/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-VariableLbe.epf --traceabstraction.order.of.the.error.locations.to.be.checked PROGRAM_FIRST -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --cacsl2boogietranslator.check.absence.of.signed.integer.overflows true -i ../../../trunk/examples/svcomp/weaver/unroll-cond-4.wvr.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-ac9dbd0-m [2023-08-27 15:32:37,113 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-08-27 15:32:37,190 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 15:32:37,196 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-08-27 15:32:37,196 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Checked method. Library mode if empty. [2023-08-27 15:32:37,217 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-27 15:32:37,218 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-27 15:32:37,218 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-27 15:32:37,219 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-27 15:32:37,219 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-08-27 15:32:37,219 INFO L153 SettingsManager]: * Use SBE=true [2023-08-27 15:32:37,220 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-27 15:32:37,220 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-27 15:32:37,220 INFO L153 SettingsManager]: * sizeof long=4 [2023-08-27 15:32:37,221 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-27 15:32:37,221 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-08-27 15:32:37,221 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-08-27 15:32:37,222 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-27 15:32:37,222 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-27 15:32:37,222 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-27 15:32:37,223 INFO L153 SettingsManager]: * sizeof long double=12 [2023-08-27 15:32:37,226 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-08-27 15:32:37,226 INFO L153 SettingsManager]: * Use constant arrays=true [2023-08-27 15:32:37,226 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-27 15:32:37,226 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-27 15:32:37,227 INFO L153 SettingsManager]: * To the following directory=./dump/ [2023-08-27 15:32:37,227 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-27 15:32:37,227 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-27 15:32:37,227 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-27 15:32:37,228 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-27 15:32:37,228 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-27 15:32:37,228 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-27 15:32:37,228 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-27 15:32:37,229 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-27 15:32:37,229 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-27 15:32:37,229 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Order of the error locations to be checked -> PROGRAM_FIRST Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check absence of signed integer overflows -> true [2023-08-27 15:32:37,553 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-27 15:32:37,580 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-27 15:32:37,582 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-27 15:32:37,583 INFO L270 PluginConnector]: Initializing CDTParser... [2023-08-27 15:32:37,583 INFO L274 PluginConnector]: CDTParser initialized [2023-08-27 15:32:37,584 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/unroll-cond-4.wvr.c [2023-08-27 15:32:38,778 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-08-27 15:32:38,959 INFO L384 CDTParser]: Found 1 translation units. [2023-08-27 15:32:38,959 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/unroll-cond-4.wvr.c [2023-08-27 15:32:38,965 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/97d20a926/972049bf484e46ed967e4a285f06880d/FLAG7d10ff029 [2023-08-27 15:32:38,975 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/97d20a926/972049bf484e46ed967e4a285f06880d [2023-08-27 15:32:38,977 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-27 15:32:38,978 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-08-27 15:32:38,979 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-27 15:32:38,979 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-27 15:32:38,981 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-27 15:32:38,982 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.08 03:32:38" (1/1) ... [2023-08-27 15:32:38,982 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@77f2987f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 03:32:38, skipping insertion in model container [2023-08-27 15:32:38,982 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.08 03:32:38" (1/1) ... [2023-08-27 15:32:39,008 INFO L176 MainTranslator]: Built tables and reachable declarations [2023-08-27 15:32:39,171 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-27 15:32:39,185 INFO L201 MainTranslator]: Completed pre-run [2023-08-27 15:32:39,216 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-27 15:32:39,230 INFO L206 MainTranslator]: Completed translation [2023-08-27 15:32:39,230 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 03:32:39 WrapperNode [2023-08-27 15:32:39,230 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-27 15:32:39,231 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-27 15:32:39,231 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-27 15:32:39,231 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-27 15:32:39,237 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 03:32:39" (1/1) ... [2023-08-27 15:32:39,254 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 03:32:39" (1/1) ... [2023-08-27 15:32:39,291 INFO L138 Inliner]: procedures = 24, calls = 42, calls flagged for inlining = 16, calls inlined = 16, statements flattened = 191 [2023-08-27 15:32:39,291 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-27 15:32:39,292 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-27 15:32:39,292 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-27 15:32:39,292 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-08-27 15:32:39,299 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 03:32:39" (1/1) ... [2023-08-27 15:32:39,300 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 03:32:39" (1/1) ... [2023-08-27 15:32:39,312 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 03:32:39" (1/1) ... [2023-08-27 15:32:39,313 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 03:32:39" (1/1) ... [2023-08-27 15:32:39,325 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 03:32:39" (1/1) ... [2023-08-27 15:32:39,328 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 03:32:39" (1/1) ... [2023-08-27 15:32:39,330 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 03:32:39" (1/1) ... [2023-08-27 15:32:39,331 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 03:32:39" (1/1) ... [2023-08-27 15:32:39,333 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-27 15:32:39,333 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-27 15:32:39,334 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-08-27 15:32:39,334 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-08-27 15:32:39,334 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 03:32:39" (1/1) ... [2023-08-27 15:32:39,346 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-27 15:32:39,361 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 15:32:39,374 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 15:32:39,383 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 15:32:39,420 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-27 15:32:39,421 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-08-27 15:32:39,421 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-08-27 15:32:39,421 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-08-27 15:32:39,421 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-08-27 15:32:39,422 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-27 15:32:39,422 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-27 15:32:39,422 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-27 15:32:39,422 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-08-27 15:32:39,423 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-27 15:32:39,423 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-27 15:32:39,423 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-27 15:32:39,423 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-27 15:32:39,424 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 15:32:39,506 INFO L236 CfgBuilder]: Building ICFG [2023-08-27 15:32:39,508 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-27 15:32:39,859 INFO L277 CfgBuilder]: Performing block encoding [2023-08-27 15:32:39,868 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-27 15:32:39,868 INFO L302 CfgBuilder]: Removed 3 assume(true) statements. [2023-08-27 15:32:39,870 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.08 03:32:39 BoogieIcfgContainer [2023-08-27 15:32:39,870 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-27 15:32:39,872 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-27 15:32:39,872 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-08-27 15:32:39,874 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-08-27 15:32:39,875 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.08 03:32:38" (1/3) ... [2023-08-27 15:32:39,875 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6c096d41 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.08 03:32:39, skipping insertion in model container [2023-08-27 15:32:39,875 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 03:32:39" (2/3) ... [2023-08-27 15:32:39,876 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6c096d41 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.08 03:32:39, skipping insertion in model container [2023-08-27 15:32:39,876 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.08 03:32:39" (3/3) ... [2023-08-27 15:32:39,881 INFO L112 eAbstractionObserver]: Analyzing ICFG unroll-cond-4.wvr.c [2023-08-27 15:32:39,896 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-27 15:32:39,897 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 3 error locations. [2023-08-27 15:32:39,897 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-27 15:32:39,986 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-08-27 15:32:40,024 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 214 places, 228 transitions, 472 flow [2023-08-27 15:32:40,125 INFO L124 PetriNetUnfolderBase]: 21/226 cut-off events. [2023-08-27 15:32:40,125 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-08-27 15:32:40,133 INFO L83 FinitePrefix]: Finished finitePrefix Result has 235 conditions, 226 events. 21/226 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 391 event pairs, 0 based on Foata normal form. 0/202 useless extension candidates. Maximal degree in co-relation 133. Up to 2 conditions per place. [2023-08-27 15:32:40,134 INFO L82 GeneralOperation]: Start removeDead. Operand has 214 places, 228 transitions, 472 flow [2023-08-27 15:32:40,145 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 203 places, 217 transitions, 446 flow [2023-08-27 15:32:40,150 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-27 15:32:40,164 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 203 places, 217 transitions, 446 flow [2023-08-27 15:32:40,170 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 203 places, 217 transitions, 446 flow [2023-08-27 15:32:40,170 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 203 places, 217 transitions, 446 flow [2023-08-27 15:32:40,224 INFO L124 PetriNetUnfolderBase]: 21/217 cut-off events. [2023-08-27 15:32:40,224 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-08-27 15:32:40,229 INFO L83 FinitePrefix]: Finished finitePrefix Result has 226 conditions, 217 events. 21/217 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 373 event pairs, 0 based on Foata normal form. 0/194 useless extension candidates. Maximal degree in co-relation 133. Up to 2 conditions per place. [2023-08-27 15:32:40,233 INFO L119 LiptonReduction]: Number of co-enabled transitions 5492 [2023-08-27 15:32:50,155 INFO L134 LiptonReduction]: Checked pairs total: 5321 [2023-08-27 15:32:50,155 INFO L136 LiptonReduction]: Total number of compositions: 262 [2023-08-27 15:32:50,175 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-27 15:32:50,181 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;@4a7b43c7, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-27 15:32:50,184 INFO L358 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2023-08-27 15:32:50,190 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-27 15:32:50,191 INFO L124 PetriNetUnfolderBase]: 1/2 cut-off events. [2023-08-27 15:32:50,191 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-27 15:32:50,191 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 15:32:50,191 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-27 15:32:50,192 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 15:32:50,196 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 15:32:50,196 INFO L85 PathProgramCache]: Analyzing trace with hash 30561, now seen corresponding path program 1 times [2023-08-27 15:32:50,203 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 15:32:50,204 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [885376282] [2023-08-27 15:32:50,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 15:32:50,204 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 15:32:50,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 15:32:50,407 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 15:32:50,408 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 15:32:50,408 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [885376282] [2023-08-27 15:32:50,409 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [885376282] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-27 15:32:50,409 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-27 15:32:50,409 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-27 15:32:50,410 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1004173851] [2023-08-27 15:32:50,411 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-27 15:32:50,417 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-27 15:32:50,421 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 15:32:50,437 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-27 15:32:50,437 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-27 15:32:50,440 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 200 out of 490 [2023-08-27 15:32:50,445 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 23 places, 19 transitions, 50 flow. Second operand has 3 states, 3 states have (on average 200.66666666666666) internal successors, (602), 3 states have internal predecessors, (602), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 15:32:50,445 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 15:32:50,445 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 200 of 490 [2023-08-27 15:32:50,446 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 15:32:50,527 INFO L124 PetriNetUnfolderBase]: 50/87 cut-off events. [2023-08-27 15:32:50,527 INFO L125 PetriNetUnfolderBase]: For 7/7 co-relation queries the response was YES. [2023-08-27 15:32:50,527 INFO L83 FinitePrefix]: Finished finitePrefix Result has 187 conditions, 87 events. 50/87 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 198 event pairs, 19 based on Foata normal form. 0/54 useless extension candidates. Maximal degree in co-relation 129. Up to 84 conditions per place. [2023-08-27 15:32:50,529 INFO L140 encePairwiseOnDemand]: 485/490 looper letters, 16 selfloop transitions, 3 changer transitions 0/21 dead transitions. [2023-08-27 15:32:50,529 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 25 places, 21 transitions, 92 flow [2023-08-27 15:32:50,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-27 15:32:50,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-27 15:32:50,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 621 transitions. [2023-08-27 15:32:50,543 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42244897959183675 [2023-08-27 15:32:50,544 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 621 transitions. [2023-08-27 15:32:50,544 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 621 transitions. [2023-08-27 15:32:50,546 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 15:32:50,548 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 621 transitions. [2023-08-27 15:32:50,552 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 207.0) internal successors, (621), 3 states have internal predecessors, (621), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 15:32:50,558 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 490.0) internal successors, (1960), 4 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 15:32:50,559 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 490.0) internal successors, (1960), 4 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 15:32:50,560 INFO L175 Difference]: Start difference. First operand has 23 places, 19 transitions, 50 flow. Second operand 3 states and 621 transitions. [2023-08-27 15:32:50,561 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 25 places, 21 transitions, 92 flow [2023-08-27 15:32:50,563 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 21 places, 21 transitions, 84 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-08-27 15:32:50,564 INFO L231 Difference]: Finished difference. Result has 22 places, 21 transitions, 63 flow [2023-08-27 15:32:50,565 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=490, PETRI_DIFFERENCE_MINUEND_FLOW=42, PETRI_DIFFERENCE_MINUEND_PLACES=19, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=19, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=16, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=63, PETRI_PLACES=22, PETRI_TRANSITIONS=21} [2023-08-27 15:32:50,568 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, -1 predicate places. [2023-08-27 15:32:50,569 INFO L495 AbstractCegarLoop]: Abstraction has has 22 places, 21 transitions, 63 flow [2023-08-27 15:32:50,569 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 200.66666666666666) internal successors, (602), 3 states have internal predecessors, (602), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 15:32:50,569 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 15:32:50,569 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-08-27 15:32:50,570 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-27 15:32:50,570 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT (and 2 more)] === [2023-08-27 15:32:50,577 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 15:32:50,577 INFO L85 PathProgramCache]: Analyzing trace with hash 949091, now seen corresponding path program 1 times [2023-08-27 15:32:50,577 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 15:32:50,578 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [841552147] [2023-08-27 15:32:50,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 15:32:50,578 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 15:32:50,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 15:32:50,690 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 15:32:50,690 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 15:32:50,690 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [841552147] [2023-08-27 15:32:50,690 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [841552147] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-27 15:32:50,691 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-27 15:32:50,691 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-27 15:32:50,691 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [695139573] [2023-08-27 15:32:50,691 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-27 15:32:50,692 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-27 15:32:50,692 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 15:32:50,692 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-27 15:32:50,693 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-27 15:32:50,693 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 200 out of 490 [2023-08-27 15:32:50,694 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 22 places, 21 transitions, 63 flow. Second operand has 3 states, 3 states have (on average 201.0) internal successors, (603), 3 states have internal predecessors, (603), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 15:32:50,694 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 15:32:50,694 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 200 of 490 [2023-08-27 15:32:50,695 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 15:32:50,751 INFO L124 PetriNetUnfolderBase]: 50/86 cut-off events. [2023-08-27 15:32:50,751 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-08-27 15:32:50,752 INFO L83 FinitePrefix]: Finished finitePrefix Result has 185 conditions, 86 events. 50/86 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 190 event pairs, 19 based on Foata normal form. 0/54 useless extension candidates. Maximal degree in co-relation 161. Up to 80 conditions per place. [2023-08-27 15:32:50,752 INFO L140 encePairwiseOnDemand]: 487/490 looper letters, 15 selfloop transitions, 3 changer transitions 0/20 dead transitions. [2023-08-27 15:32:50,753 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 23 places, 20 transitions, 95 flow [2023-08-27 15:32:50,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-27 15:32:50,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-27 15:32:50,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 617 transitions. [2023-08-27 15:32:50,757 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4197278911564626 [2023-08-27 15:32:50,758 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 617 transitions. [2023-08-27 15:32:50,758 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 617 transitions. [2023-08-27 15:32:50,758 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 15:32:50,758 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 617 transitions. [2023-08-27 15:32:50,762 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 205.66666666666666) internal successors, (617), 3 states have internal predecessors, (617), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 15:32:50,765 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 490.0) internal successors, (1960), 4 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 15:32:50,766 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 490.0) internal successors, (1960), 4 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 15:32:50,766 INFO L175 Difference]: Start difference. First operand has 22 places, 21 transitions, 63 flow. Second operand 3 states and 617 transitions. [2023-08-27 15:32:50,766 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 23 places, 20 transitions, 95 flow [2023-08-27 15:32:50,767 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 22 places, 20 transitions, 90 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-08-27 15:32:50,768 INFO L231 Difference]: Finished difference. Result has 22 places, 20 transitions, 60 flow [2023-08-27 15:32:50,768 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=490, PETRI_DIFFERENCE_MINUEND_FLOW=54, PETRI_DIFFERENCE_MINUEND_PLACES=20, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=20, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=17, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=60, PETRI_PLACES=22, PETRI_TRANSITIONS=20} [2023-08-27 15:32:50,768 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, -1 predicate places. [2023-08-27 15:32:50,769 INFO L495 AbstractCegarLoop]: Abstraction has has 22 places, 20 transitions, 60 flow [2023-08-27 15:32:50,769 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 201.0) internal successors, (603), 3 states have internal predecessors, (603), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 15:32:50,769 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 15:32:50,769 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-08-27 15:32:50,769 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-27 15:32:50,770 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 15:32:50,770 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 15:32:50,770 INFO L85 PathProgramCache]: Analyzing trace with hash 949119, now seen corresponding path program 1 times [2023-08-27 15:32:50,770 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 15:32:50,771 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1771222227] [2023-08-27 15:32:50,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 15:32:50,771 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 15:32:50,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 15:32:50,875 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 15:32:50,875 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 15:32:50,875 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1771222227] [2023-08-27 15:32:50,876 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1771222227] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 15:32:50,876 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [272221099] [2023-08-27 15:32:50,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 15:32:50,876 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 15:32:50,876 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 15:32:50,882 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 15:32:50,910 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 15:32:50,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 15:32:50,988 INFO L262 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-27 15:32:50,991 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 15:32:51,036 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 15:32:51,036 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 15:32:51,058 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 15:32:51,059 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [272221099] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 15:32:51,062 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 15:32:51,062 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 5 [2023-08-27 15:32:51,062 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1146974219] [2023-08-27 15:32:51,062 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 15:32:51,063 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-27 15:32:51,063 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 15:32:51,063 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-27 15:32:51,064 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-08-27 15:32:51,066 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 200 out of 490 [2023-08-27 15:32:51,067 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 22 places, 20 transitions, 60 flow. Second operand has 7 states, 7 states have (on average 201.14285714285714) internal successors, (1408), 7 states have internal predecessors, (1408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 15:32:51,067 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 15:32:51,068 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 200 of 490 [2023-08-27 15:32:51,068 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 15:32:51,128 INFO L124 PetriNetUnfolderBase]: 53/92 cut-off events. [2023-08-27 15:32:51,128 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-08-27 15:32:51,128 INFO L83 FinitePrefix]: Finished finitePrefix Result has 206 conditions, 92 events. 53/92 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 216 event pairs, 19 based on Foata normal form. 0/62 useless extension candidates. Maximal degree in co-relation 161. Up to 86 conditions per place. [2023-08-27 15:32:51,129 INFO L140 encePairwiseOnDemand]: 486/490 looper letters, 15 selfloop transitions, 9 changer transitions 0/26 dead transitions. [2023-08-27 15:32:51,129 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 27 places, 26 transitions, 138 flow [2023-08-27 15:32:51,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-27 15:32:51,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-27 15:32:51,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1227 transitions. [2023-08-27 15:32:51,132 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4173469387755102 [2023-08-27 15:32:51,133 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1227 transitions. [2023-08-27 15:32:51,133 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1227 transitions. [2023-08-27 15:32:51,134 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 15:32:51,134 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1227 transitions. [2023-08-27 15:32:51,137 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 204.5) internal successors, (1227), 6 states have internal predecessors, (1227), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 15:32:51,142 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 490.0) internal successors, (3430), 7 states have internal predecessors, (3430), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 15:32:51,143 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 490.0) internal successors, (3430), 7 states have internal predecessors, (3430), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 15:32:51,143 INFO L175 Difference]: Start difference. First operand has 22 places, 20 transitions, 60 flow. Second operand 6 states and 1227 transitions. [2023-08-27 15:32:51,143 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 27 places, 26 transitions, 138 flow [2023-08-27 15:32:51,144 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 25 places, 26 transitions, 126 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-27 15:32:51,145 INFO L231 Difference]: Finished difference. Result has 28 places, 26 transitions, 115 flow [2023-08-27 15:32:51,145 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=490, 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 15:32:51,146 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 5 predicate places. [2023-08-27 15:32:51,146 INFO L495 AbstractCegarLoop]: Abstraction has has 28 places, 26 transitions, 115 flow [2023-08-27 15:32:51,147 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 201.14285714285714) internal successors, (1408), 7 states have internal predecessors, (1408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 15:32:51,147 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 15:32:51,147 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1] [2023-08-27 15:32:51,156 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-08-27 15:32:51,353 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 15:32:51,354 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 15:32:51,354 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 15:32:51,354 INFO L85 PathProgramCache]: Analyzing trace with hash -1788712963, now seen corresponding path program 2 times [2023-08-27 15:32:51,354 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 15:32:51,355 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1734481605] [2023-08-27 15:32:51,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 15:32:51,355 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 15:32:51,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 15:32:51,481 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 15:32:51,481 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 15:32:51,481 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1734481605] [2023-08-27 15:32:51,481 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1734481605] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 15:32:51,481 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1870080563] [2023-08-27 15:32:51,481 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-27 15:32:51,482 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 15:32:51,482 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 15:32:51,483 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 15:32:51,491 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 15:32:51,576 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-08-27 15:32:51,576 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 15:32:51,577 INFO L262 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-27 15:32:51,578 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 15:32:51,593 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 15:32:51,593 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-27 15:32:51,594 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1870080563] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-27 15:32:51,594 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-27 15:32:51,594 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [5] total 6 [2023-08-27 15:32:51,594 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1241917332] [2023-08-27 15:32:51,594 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-27 15:32:51,594 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-27 15:32:51,595 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 15:32:51,595 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-27 15:32:51,595 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2023-08-27 15:32:51,596 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 201 out of 490 [2023-08-27 15:32:51,628 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 28 places, 26 transitions, 115 flow. Second operand has 3 states, 3 states have (on average 202.0) internal successors, (606), 3 states have internal predecessors, (606), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 15:32:51,628 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 15:32:51,628 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 201 of 490 [2023-08-27 15:32:51,629 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 15:32:51,669 INFO L124 PetriNetUnfolderBase]: 53/91 cut-off events. [2023-08-27 15:32:51,670 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-08-27 15:32:51,670 INFO L83 FinitePrefix]: Finished finitePrefix Result has 217 conditions, 91 events. 53/91 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 204 event pairs, 19 based on Foata normal form. 1/61 useless extension candidates. Maximal degree in co-relation 187. Up to 88 conditions per place. [2023-08-27 15:32:51,671 INFO L140 encePairwiseOnDemand]: 488/490 looper letters, 22 selfloop transitions, 1 changer transitions 0/25 dead transitions. [2023-08-27 15:32:51,671 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 29 places, 25 transitions, 151 flow [2023-08-27 15:32:51,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-27 15:32:51,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-27 15:32:51,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 619 transitions. [2023-08-27 15:32:51,673 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42108843537414964 [2023-08-27 15:32:51,673 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 619 transitions. [2023-08-27 15:32:51,673 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 619 transitions. [2023-08-27 15:32:51,674 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 15:32:51,674 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 619 transitions. [2023-08-27 15:32:51,675 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 206.33333333333334) internal successors, (619), 3 states have internal predecessors, (619), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 15:32:51,678 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 490.0) internal successors, (1960), 4 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 15:32:51,679 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 490.0) internal successors, (1960), 4 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 15:32:51,679 INFO L175 Difference]: Start difference. First operand has 28 places, 26 transitions, 115 flow. Second operand 3 states and 619 transitions. [2023-08-27 15:32:51,679 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 29 places, 25 transitions, 151 flow [2023-08-27 15:32:51,680 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 15:32:51,680 INFO L231 Difference]: Finished difference. Result has 24 places, 25 transitions, 70 flow [2023-08-27 15:32:51,681 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=490, 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 15:32:51,681 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 1 predicate places. [2023-08-27 15:32:51,681 INFO L495 AbstractCegarLoop]: Abstraction has has 24 places, 25 transitions, 70 flow [2023-08-27 15:32:51,682 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 202.0) internal successors, (606), 3 states have internal predecessors, (606), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 15:32:51,682 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 15:32:51,682 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 15:32:51,691 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-08-27 15:32:51,888 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2023-08-27 15:32:51,888 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 15:32:51,889 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 15:32:51,889 INFO L85 PathProgramCache]: Analyzing trace with hash -98128153, now seen corresponding path program 1 times [2023-08-27 15:32:51,889 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 15:32:51,889 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [847044185] [2023-08-27 15:32:51,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 15:32:51,889 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 15:32:51,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 15:32:52,008 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 15:32:52,009 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 15:32:52,009 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [847044185] [2023-08-27 15:32:52,009 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [847044185] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-27 15:32:52,009 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-27 15:32:52,009 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-27 15:32:52,009 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [401192726] [2023-08-27 15:32:52,010 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-27 15:32:52,010 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-27 15:32:52,011 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 15:32:52,011 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-27 15:32:52,011 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-27 15:32:52,012 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 196 out of 490 [2023-08-27 15:32:52,013 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 24 places, 25 transitions, 70 flow. Second operand has 3 states, 3 states have (on average 200.0) internal successors, (600), 3 states have internal predecessors, (600), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 15:32:52,013 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 15:32:52,013 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 196 of 490 [2023-08-27 15:32:52,013 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 15:32:52,084 INFO L124 PetriNetUnfolderBase]: 52/90 cut-off events. [2023-08-27 15:32:52,085 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-08-27 15:32:52,085 INFO L83 FinitePrefix]: Finished finitePrefix Result has 192 conditions, 90 events. 52/90 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 197 event pairs, 19 based on Foata normal form. 1/61 useless extension candidates. Maximal degree in co-relation 184. Up to 87 conditions per place. [2023-08-27 15:32:52,085 INFO L140 encePairwiseOnDemand]: 487/490 looper letters, 20 selfloop transitions, 2 changer transitions 0/24 dead transitions. [2023-08-27 15:32:52,085 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 26 places, 24 transitions, 110 flow [2023-08-27 15:32:52,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-27 15:32:52,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-27 15:32:52,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 605 transitions. [2023-08-27 15:32:52,088 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41156462585034015 [2023-08-27 15:32:52,088 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 605 transitions. [2023-08-27 15:32:52,088 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 605 transitions. [2023-08-27 15:32:52,088 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 15:32:52,088 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 605 transitions. [2023-08-27 15:32:52,090 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 201.66666666666666) internal successors, (605), 3 states have internal predecessors, (605), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 15:32:52,093 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 490.0) internal successors, (1960), 4 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 15:32:52,094 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 490.0) internal successors, (1960), 4 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 15:32:52,094 INFO L175 Difference]: Start difference. First operand has 24 places, 25 transitions, 70 flow. Second operand 3 states and 605 transitions. [2023-08-27 15:32:52,094 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 26 places, 24 transitions, 110 flow [2023-08-27 15:32:52,095 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 15:32:52,095 INFO L231 Difference]: Finished difference. Result has 25 places, 24 transitions, 69 flow [2023-08-27 15:32:52,096 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=490, 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 15:32:52,098 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 2 predicate places. [2023-08-27 15:32:52,098 INFO L495 AbstractCegarLoop]: Abstraction has has 25 places, 24 transitions, 69 flow [2023-08-27 15:32:52,100 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 200.0) internal successors, (600), 3 states have internal predecessors, (600), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 15:32:52,101 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 15:32:52,101 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 15:32:52,101 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-08-27 15:32:52,103 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 15:32:52,103 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 15:32:52,104 INFO L85 PathProgramCache]: Analyzing trace with hash 1045741545, now seen corresponding path program 1 times [2023-08-27 15:32:52,104 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 15:32:52,104 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [379925108] [2023-08-27 15:32:52,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 15:32:52,104 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 15:32:52,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 15:32:52,416 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 15:32:52,417 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 15:32:52,417 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [379925108] [2023-08-27 15:32:52,417 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [379925108] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-27 15:32:52,418 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-27 15:32:52,418 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-27 15:32:52,418 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1533081796] [2023-08-27 15:32:52,418 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-27 15:32:52,418 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-27 15:32:52,418 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 15:32:52,419 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-27 15:32:52,420 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-08-27 15:32:52,421 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 178 out of 490 [2023-08-27 15:32:52,421 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 25 places, 24 transitions, 69 flow. Second operand has 5 states, 5 states have (on average 181.0) internal successors, (905), 5 states have internal predecessors, (905), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 15:32:52,422 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 15:32:52,422 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 178 of 490 [2023-08-27 15:32:52,422 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 15:32:52,578 INFO L124 PetriNetUnfolderBase]: 75/141 cut-off events. [2023-08-27 15:32:52,578 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-08-27 15:32:52,579 INFO L83 FinitePrefix]: Finished finitePrefix Result has 301 conditions, 141 events. 75/141 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 369 event pairs, 24 based on Foata normal form. 0/110 useless extension candidates. Maximal degree in co-relation 292. Up to 83 conditions per place. [2023-08-27 15:32:52,579 INFO L140 encePairwiseOnDemand]: 484/490 looper letters, 41 selfloop transitions, 5 changer transitions 0/46 dead transitions. [2023-08-27 15:32:52,582 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 29 places, 46 transitions, 210 flow [2023-08-27 15:32:52,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-27 15:32:52,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-27 15:32:52,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 930 transitions. [2023-08-27 15:32:52,585 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3795918367346939 [2023-08-27 15:32:52,586 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 930 transitions. [2023-08-27 15:32:52,586 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 930 transitions. [2023-08-27 15:32:52,586 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 15:32:52,586 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 930 transitions. [2023-08-27 15:32:52,589 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 186.0) internal successors, (930), 5 states have internal predecessors, (930), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 15:32:52,593 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 490.0) internal successors, (2940), 6 states have internal predecessors, (2940), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 15:32:52,593 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 490.0) internal successors, (2940), 6 states have internal predecessors, (2940), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 15:32:52,594 INFO L175 Difference]: Start difference. First operand has 25 places, 24 transitions, 69 flow. Second operand 5 states and 930 transitions. [2023-08-27 15:32:52,594 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 29 places, 46 transitions, 210 flow [2023-08-27 15:32:52,594 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 27 places, 46 transitions, 206 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-27 15:32:52,596 INFO L231 Difference]: Finished difference. Result has 30 places, 28 transitions, 101 flow [2023-08-27 15:32:52,596 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=490, 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=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=101, PETRI_PLACES=30, PETRI_TRANSITIONS=28} [2023-08-27 15:32:52,598 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 7 predicate places. [2023-08-27 15:32:52,598 INFO L495 AbstractCegarLoop]: Abstraction has has 30 places, 28 transitions, 101 flow [2023-08-27 15:32:52,599 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 181.0) internal successors, (905), 5 states have internal predecessors, (905), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 15:32:52,599 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 15:32:52,599 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 15:32:52,599 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-08-27 15:32:52,599 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 15:32:52,600 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 15:32:52,600 INFO L85 PathProgramCache]: Analyzing trace with hash 161545971, now seen corresponding path program 2 times [2023-08-27 15:32:52,600 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 15:32:52,600 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [560704398] [2023-08-27 15:32:52,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 15:32:52,601 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 15:32:52,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 15:32:52,932 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 15:32:52,933 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 15:32:52,933 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [560704398] [2023-08-27 15:32:52,933 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [560704398] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-27 15:32:52,933 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-27 15:32:52,933 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-27 15:32:52,933 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1417390843] [2023-08-27 15:32:52,933 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-27 15:32:52,934 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-27 15:32:52,934 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 15:32:52,934 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-27 15:32:52,934 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-27 15:32:52,935 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 178 out of 490 [2023-08-27 15:32:52,936 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 30 places, 28 transitions, 101 flow. Second operand has 5 states, 5 states have (on average 181.0) internal successors, (905), 5 states have internal predecessors, (905), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 15:32:52,936 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 15:32:52,936 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 178 of 490 [2023-08-27 15:32:52,937 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 15:32:53,071 INFO L124 PetriNetUnfolderBase]: 114/214 cut-off events. [2023-08-27 15:32:53,076 INFO L125 PetriNetUnfolderBase]: For 118/118 co-relation queries the response was YES. [2023-08-27 15:32:53,077 INFO L83 FinitePrefix]: Finished finitePrefix Result has 618 conditions, 214 events. 114/214 cut-off events. For 118/118 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 678 event pairs, 42 based on Foata normal form. 2/175 useless extension candidates. Maximal degree in co-relation 607. Up to 139 conditions per place. [2023-08-27 15:32:53,078 INFO L140 encePairwiseOnDemand]: 484/490 looper letters, 43 selfloop transitions, 7 changer transitions 0/50 dead transitions. [2023-08-27 15:32:53,078 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 34 places, 50 transitions, 283 flow [2023-08-27 15:32:53,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-27 15:32:53,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-27 15:32:53,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 926 transitions. [2023-08-27 15:32:53,081 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37795918367346937 [2023-08-27 15:32:53,081 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 926 transitions. [2023-08-27 15:32:53,081 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 926 transitions. [2023-08-27 15:32:53,082 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 15:32:53,082 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 926 transitions. [2023-08-27 15:32:53,084 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 185.2) internal successors, (926), 5 states have internal predecessors, (926), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 15:32:53,087 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 490.0) internal successors, (2940), 6 states have internal predecessors, (2940), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 15:32:53,090 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 490.0) internal successors, (2940), 6 states have internal predecessors, (2940), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 15:32:53,090 INFO L175 Difference]: Start difference. First operand has 30 places, 28 transitions, 101 flow. Second operand 5 states and 926 transitions. [2023-08-27 15:32:53,090 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 34 places, 50 transitions, 283 flow [2023-08-27 15:32:53,093 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 33 places, 50 transitions, 266 flow, removed 5 selfloop flow, removed 1 redundant places. [2023-08-27 15:32:53,094 INFO L231 Difference]: Finished difference. Result has 36 places, 32 transitions, 143 flow [2023-08-27 15:32:53,094 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=490, PETRI_DIFFERENCE_MINUEND_FLOW=95, PETRI_DIFFERENCE_MINUEND_PLACES=29, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=28, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=143, PETRI_PLACES=36, PETRI_TRANSITIONS=32} [2023-08-27 15:32:53,095 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 13 predicate places. [2023-08-27 15:32:53,095 INFO L495 AbstractCegarLoop]: Abstraction has has 36 places, 32 transitions, 143 flow [2023-08-27 15:32:53,095 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 181.0) internal successors, (905), 5 states have internal predecessors, (905), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 15:32:53,096 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 15:32:53,096 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 15:32:53,096 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-08-27 15:32:53,096 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 15:32:53,096 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 15:32:53,096 INFO L85 PathProgramCache]: Analyzing trace with hash -202436465, now seen corresponding path program 3 times [2023-08-27 15:32:53,096 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 15:32:53,097 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [972710998] [2023-08-27 15:32:53,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 15:32:53,097 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 15:32:53,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 15:32:53,480 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 15:32:53,480 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 15:32:53,481 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [972710998] [2023-08-27 15:32:53,481 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [972710998] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-27 15:32:53,481 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-27 15:32:53,481 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-27 15:32:53,481 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1454840180] [2023-08-27 15:32:53,481 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-27 15:32:53,481 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-27 15:32:53,482 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 15:32:53,482 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-27 15:32:53,482 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-27 15:32:53,483 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 178 out of 490 [2023-08-27 15:32:53,484 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 36 places, 32 transitions, 143 flow. Second operand has 5 states, 5 states have (on average 181.0) internal successors, (905), 5 states have internal predecessors, (905), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 15:32:53,484 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 15:32:53,484 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 178 of 490 [2023-08-27 15:32:53,484 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 15:32:53,677 INFO L124 PetriNetUnfolderBase]: 124/230 cut-off events. [2023-08-27 15:32:53,677 INFO L125 PetriNetUnfolderBase]: For 317/317 co-relation queries the response was YES. [2023-08-27 15:32:53,678 INFO L83 FinitePrefix]: Finished finitePrefix Result has 801 conditions, 230 events. 124/230 cut-off events. For 317/317 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 740 event pairs, 44 based on Foata normal form. 4/207 useless extension candidates. Maximal degree in co-relation 787. Up to 127 conditions per place. [2023-08-27 15:32:53,679 INFO L140 encePairwiseOnDemand]: 484/490 looper letters, 43 selfloop transitions, 12 changer transitions 0/55 dead transitions. [2023-08-27 15:32:53,679 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 40 places, 55 transitions, 352 flow [2023-08-27 15:32:53,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-27 15:32:53,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-27 15:32:53,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 931 transitions. [2023-08-27 15:32:53,682 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38 [2023-08-27 15:32:53,682 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 931 transitions. [2023-08-27 15:32:53,683 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 931 transitions. [2023-08-27 15:32:53,683 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 15:32:53,683 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 931 transitions. [2023-08-27 15:32:53,685 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 186.2) internal successors, (931), 5 states have internal predecessors, (931), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 15:32:53,688 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 490.0) internal successors, (2940), 6 states have internal predecessors, (2940), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 15:32:53,689 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 490.0) internal successors, (2940), 6 states have internal predecessors, (2940), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 15:32:53,689 INFO L175 Difference]: Start difference. First operand has 36 places, 32 transitions, 143 flow. Second operand 5 states and 931 transitions. [2023-08-27 15:32:53,689 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 40 places, 55 transitions, 352 flow [2023-08-27 15:32:53,691 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 39 places, 55 transitions, 328 flow, removed 8 selfloop flow, removed 1 redundant places. [2023-08-27 15:32:53,692 INFO L231 Difference]: Finished difference. Result has 42 places, 38 transitions, 222 flow [2023-08-27 15:32:53,692 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=490, PETRI_DIFFERENCE_MINUEND_FLOW=133, PETRI_DIFFERENCE_MINUEND_PLACES=35, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=222, PETRI_PLACES=42, PETRI_TRANSITIONS=38} [2023-08-27 15:32:53,692 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 19 predicate places. [2023-08-27 15:32:53,692 INFO L495 AbstractCegarLoop]: Abstraction has has 42 places, 38 transitions, 222 flow [2023-08-27 15:32:53,693 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 181.0) internal successors, (905), 5 states have internal predecessors, (905), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 15:32:53,693 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 15:32:53,693 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 15:32:53,693 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-08-27 15:32:53,693 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 15:32:53,694 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 15:32:53,694 INFO L85 PathProgramCache]: Analyzing trace with hash 1938946377, now seen corresponding path program 4 times [2023-08-27 15:32:53,694 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 15:32:53,694 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [152095906] [2023-08-27 15:32:53,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 15:32:53,694 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 15:32:53,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 15:32:53,899 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-27 15:32:53,899 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 15:32:53,900 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [152095906] [2023-08-27 15:32:53,900 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [152095906] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-27 15:32:53,900 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-27 15:32:53,900 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-27 15:32:53,900 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1634065142] [2023-08-27 15:32:53,900 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-27 15:32:53,900 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-27 15:32:53,901 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 15:32:53,901 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-27 15:32:53,901 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-08-27 15:32:53,902 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 178 out of 490 [2023-08-27 15:32:53,903 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 38 transitions, 222 flow. Second operand has 5 states, 5 states have (on average 181.0) internal successors, (905), 5 states have internal predecessors, (905), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 15:32:53,903 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 15:32:53,903 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 178 of 490 [2023-08-27 15:32:53,903 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 15:32:54,034 INFO L124 PetriNetUnfolderBase]: 120/226 cut-off events. [2023-08-27 15:32:54,034 INFO L125 PetriNetUnfolderBase]: For 547/547 co-relation queries the response was YES. [2023-08-27 15:32:54,035 INFO L83 FinitePrefix]: Finished finitePrefix Result has 864 conditions, 226 events. 120/226 cut-off events. For 547/547 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 743 event pairs, 50 based on Foata normal form. 4/203 useless extension candidates. Maximal degree in co-relation 847. Up to 183 conditions per place. [2023-08-27 15:32:54,036 INFO L140 encePairwiseOnDemand]: 484/490 looper letters, 38 selfloop transitions, 15 changer transitions 0/53 dead transitions. [2023-08-27 15:32:54,036 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 53 transitions, 406 flow [2023-08-27 15:32:54,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-27 15:32:54,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-27 15:32:54,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 925 transitions. [2023-08-27 15:32:54,039 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37755102040816324 [2023-08-27 15:32:54,039 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 925 transitions. [2023-08-27 15:32:54,039 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 925 transitions. [2023-08-27 15:32:54,040 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 15:32:54,040 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 925 transitions. [2023-08-27 15:32:54,042 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 185.0) internal successors, (925), 5 states have internal predecessors, (925), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 15:32:54,045 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 490.0) internal successors, (2940), 6 states have internal predecessors, (2940), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 15:32:54,046 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 490.0) internal successors, (2940), 6 states have internal predecessors, (2940), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 15:32:54,046 INFO L175 Difference]: Start difference. First operand has 42 places, 38 transitions, 222 flow. Second operand 5 states and 925 transitions. [2023-08-27 15:32:54,046 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 53 transitions, 406 flow [2023-08-27 15:32:54,048 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 53 transitions, 393 flow, removed 3 selfloop flow, removed 1 redundant places. [2023-08-27 15:32:54,049 INFO L231 Difference]: Finished difference. Result has 47 places, 44 transitions, 315 flow [2023-08-27 15:32:54,050 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=490, PETRI_DIFFERENCE_MINUEND_FLOW=211, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=315, PETRI_PLACES=47, PETRI_TRANSITIONS=44} [2023-08-27 15:32:54,050 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 24 predicate places. [2023-08-27 15:32:54,050 INFO L495 AbstractCegarLoop]: Abstraction has has 47 places, 44 transitions, 315 flow [2023-08-27 15:32:54,051 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 181.0) internal successors, (905), 5 states have internal predecessors, (905), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 15:32:54,051 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 15:32:54,051 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 15:32:54,051 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-08-27 15:32:54,051 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 15:32:54,052 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 15:32:54,052 INFO L85 PathProgramCache]: Analyzing trace with hash -1349975001, now seen corresponding path program 5 times [2023-08-27 15:32:54,052 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 15:32:54,052 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [893790190] [2023-08-27 15:32:54,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 15:32:54,052 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 15:32:54,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 15:32:54,316 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 15:32:54,317 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 15:32:54,317 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [893790190] [2023-08-27 15:32:54,317 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [893790190] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-27 15:32:54,317 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-27 15:32:54,317 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-27 15:32:54,317 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [213915306] [2023-08-27 15:32:54,317 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-27 15:32:54,317 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-27 15:32:54,318 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 15:32:54,318 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-27 15:32:54,318 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-08-27 15:32:54,319 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 178 out of 490 [2023-08-27 15:32:54,320 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 44 transitions, 315 flow. Second operand has 5 states, 5 states have (on average 181.0) internal successors, (905), 5 states have internal predecessors, (905), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 15:32:54,320 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 15:32:54,320 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 178 of 490 [2023-08-27 15:32:54,320 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 15:32:54,442 INFO L124 PetriNetUnfolderBase]: 121/229 cut-off events. [2023-08-27 15:32:54,442 INFO L125 PetriNetUnfolderBase]: For 733/733 co-relation queries the response was YES. [2023-08-27 15:32:54,443 INFO L83 FinitePrefix]: Finished finitePrefix Result has 976 conditions, 229 events. 121/229 cut-off events. For 733/733 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 756 event pairs, 38 based on Foata normal form. 2/204 useless extension candidates. Maximal degree in co-relation 957. Up to 129 conditions per place. [2023-08-27 15:32:54,444 INFO L140 encePairwiseOnDemand]: 484/490 looper letters, 44 selfloop transitions, 14 changer transitions 0/58 dead transitions. [2023-08-27 15:32:54,444 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 58 transitions, 473 flow [2023-08-27 15:32:54,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-27 15:32:54,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-27 15:32:54,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 929 transitions. [2023-08-27 15:32:54,447 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37918367346938775 [2023-08-27 15:32:54,447 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 929 transitions. [2023-08-27 15:32:54,447 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 929 transitions. [2023-08-27 15:32:54,448 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 15:32:54,448 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 929 transitions. [2023-08-27 15:32:54,450 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 185.8) internal successors, (929), 5 states have internal predecessors, (929), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 15:32:54,453 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 490.0) internal successors, (2940), 6 states have internal predecessors, (2940), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 15:32:54,455 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 490.0) internal successors, (2940), 6 states have internal predecessors, (2940), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 15:32:54,455 INFO L175 Difference]: Start difference. First operand has 47 places, 44 transitions, 315 flow. Second operand 5 states and 929 transitions. [2023-08-27 15:32:54,455 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 58 transitions, 473 flow [2023-08-27 15:32:54,458 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 58 transitions, 419 flow, removed 15 selfloop flow, removed 2 redundant places. [2023-08-27 15:32:54,460 INFO L231 Difference]: Finished difference. Result has 50 places, 45 transitions, 301 flow [2023-08-27 15:32:54,461 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=490, PETRI_DIFFERENCE_MINUEND_FLOW=261, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=301, PETRI_PLACES=50, PETRI_TRANSITIONS=45} [2023-08-27 15:32:54,461 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 27 predicate places. [2023-08-27 15:32:54,461 INFO L495 AbstractCegarLoop]: Abstraction has has 50 places, 45 transitions, 301 flow [2023-08-27 15:32:54,462 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 181.0) internal successors, (905), 5 states have internal predecessors, (905), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 15:32:54,462 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 15:32:54,462 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 15:32:54,462 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-08-27 15:32:54,462 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 15:32:54,462 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 15:32:54,463 INFO L85 PathProgramCache]: Analyzing trace with hash -1510415347, now seen corresponding path program 6 times [2023-08-27 15:32:54,463 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 15:32:54,463 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [856865492] [2023-08-27 15:32:54,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 15:32:54,463 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 15:32:54,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 15:32:54,713 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 15:32:54,713 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 15:32:54,713 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [856865492] [2023-08-27 15:32:54,713 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [856865492] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-27 15:32:54,713 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-27 15:32:54,713 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-27 15:32:54,714 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1008599227] [2023-08-27 15:32:54,714 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-27 15:32:54,714 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-27 15:32:54,714 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 15:32:54,714 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-27 15:32:54,714 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-27 15:32:54,715 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 178 out of 490 [2023-08-27 15:32:54,716 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 45 transitions, 301 flow. Second operand has 5 states, 5 states have (on average 181.0) internal successors, (905), 5 states have internal predecessors, (905), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 15:32:54,716 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 15:32:54,717 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 178 of 490 [2023-08-27 15:32:54,717 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 15:32:54,836 INFO L124 PetriNetUnfolderBase]: 120/222 cut-off events. [2023-08-27 15:32:54,836 INFO L125 PetriNetUnfolderBase]: For 679/679 co-relation queries the response was YES. [2023-08-27 15:32:54,837 INFO L83 FinitePrefix]: Finished finitePrefix Result has 913 conditions, 222 events. 120/222 cut-off events. For 679/679 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 708 event pairs, 49 based on Foata normal form. 2/197 useless extension candidates. Maximal degree in co-relation 893. Up to 176 conditions per place. [2023-08-27 15:32:54,838 INFO L140 encePairwiseOnDemand]: 484/490 looper letters, 40 selfloop transitions, 15 changer transitions 0/55 dead transitions. [2023-08-27 15:32:54,838 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 55 transitions, 445 flow [2023-08-27 15:32:54,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-27 15:32:54,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-27 15:32:54,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 925 transitions. [2023-08-27 15:32:54,842 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37755102040816324 [2023-08-27 15:32:54,842 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 925 transitions. [2023-08-27 15:32:54,842 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 925 transitions. [2023-08-27 15:32:54,842 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 15:32:54,842 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 925 transitions. [2023-08-27 15:32:54,844 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 185.0) internal successors, (925), 5 states have internal predecessors, (925), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 15:32:54,848 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 490.0) internal successors, (2940), 6 states have internal predecessors, (2940), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 15:32:54,849 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 490.0) internal successors, (2940), 6 states have internal predecessors, (2940), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 15:32:54,849 INFO L175 Difference]: Start difference. First operand has 50 places, 45 transitions, 301 flow. Second operand 5 states and 925 transitions. [2023-08-27 15:32:54,849 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 55 transitions, 445 flow [2023-08-27 15:32:54,852 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 55 transitions, 411 flow, removed 2 selfloop flow, removed 3 redundant places. [2023-08-27 15:32:54,853 INFO L231 Difference]: Finished difference. Result has 52 places, 46 transitions, 313 flow [2023-08-27 15:32:54,853 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=490, PETRI_DIFFERENCE_MINUEND_FLOW=269, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=313, PETRI_PLACES=52, PETRI_TRANSITIONS=46} [2023-08-27 15:32:54,853 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 29 predicate places. [2023-08-27 15:32:54,853 INFO L495 AbstractCegarLoop]: Abstraction has has 52 places, 46 transitions, 313 flow [2023-08-27 15:32:54,854 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 181.0) internal successors, (905), 5 states have internal predecessors, (905), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 15:32:54,854 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 15:32:54,854 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 15:32:54,854 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-08-27 15:32:54,855 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 15:32:54,855 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 15:32:54,855 INFO L85 PathProgramCache]: Analyzing trace with hash 155297862, now seen corresponding path program 1 times [2023-08-27 15:32:54,855 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 15:32:54,855 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1135805559] [2023-08-27 15:32:54,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 15:32:54,856 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 15:32:54,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 15:32:55,150 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 15:32:55,150 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 15:32:55,151 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1135805559] [2023-08-27 15:32:55,151 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1135805559] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 15:32:55,151 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [448767881] [2023-08-27 15:32:55,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 15:32:55,151 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 15:32:55,151 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 15:32:55,152 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 15:32:55,176 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 15:32:55,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 15:32:55,253 INFO L262 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 41 conjunts are in the unsatisfiable core [2023-08-27 15:32:55,257 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 15:32:55,317 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 15:32:55,365 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 15:32:55,411 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 15:32:55,947 INFO L322 Elim1Store]: treesize reduction 22, result has 12.0 percent of original size [2023-08-27 15:32:55,948 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 323 treesize of output 302 [2023-08-27 15:32:56,198 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 15:32:56,198 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 15:33:05,250 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 15:33:05,250 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 276 treesize of output 168 [2023-08-27 15:33:05,289 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 15:33:05,289 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 986 treesize of output 906 [2023-08-27 15:33:05,346 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 15:33:05,347 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 221 treesize of output 181 [2023-08-27 15:33:05,792 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 15:33:05,792 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 166 treesize of output 186 [2023-08-27 15:33:07,374 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 15:33:07,374 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [448767881] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 15:33:07,374 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 15:33:07,375 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8, 8] total 22 [2023-08-27 15:33:07,375 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1171127910] [2023-08-27 15:33:07,375 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 15:33:07,375 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-08-27 15:33:07,376 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 15:33:07,376 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-08-27 15:33:07,376 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=372, Unknown=2, NotChecked=0, Total=462 [2023-08-27 15:33:07,378 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 118 out of 490 [2023-08-27 15:33:07,381 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 46 transitions, 313 flow. Second operand has 22 states, 22 states have (on average 120.18181818181819) internal successors, (2644), 22 states have internal predecessors, (2644), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 15:33:07,381 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 15:33:07,381 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 118 of 490 [2023-08-27 15:33:07,381 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 15:33:15,704 WARN L234 SmtUtils]: Spent 8.18s on a formula simplification. DAG size of input: 54 DAG size of output: 51 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-27 15:33:22,076 WARN L234 SmtUtils]: Spent 6.17s on a formula simplification. DAG size of input: 56 DAG size of output: 53 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-27 15:33:30,852 WARN L234 SmtUtils]: Spent 8.29s on a formula simplification. DAG size of input: 64 DAG size of output: 61 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-27 15:33:34,719 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.56s for a HTC check with result VALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-27 15:33:44,997 WARN L234 SmtUtils]: Spent 6.12s on a formula simplification that was a NOOP. DAG size: 78 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-27 15:33:54,231 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-27 15:34:01,679 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-27 15:34:03,481 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.42s for a HTC check with result VALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-27 15:34:05,540 INFO L124 PetriNetUnfolderBase]: 681/1285 cut-off events. [2023-08-27 15:34:05,541 INFO L125 PetriNetUnfolderBase]: For 3439/3439 co-relation queries the response was YES. [2023-08-27 15:34:05,545 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5135 conditions, 1285 events. 681/1285 cut-off events. For 3439/3439 co-relation queries the response was YES. Maximal size of possible extension queue 102. Compared 7203 event pairs, 32 based on Foata normal form. 10/1102 useless extension candidates. Maximal degree in co-relation 5114. Up to 397 conditions per place. [2023-08-27 15:34:05,550 INFO L140 encePairwiseOnDemand]: 479/490 looper letters, 177 selfloop transitions, 128 changer transitions 87/392 dead transitions. [2023-08-27 15:34:05,550 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 100 places, 392 transitions, 2925 flow [2023-08-27 15:34:05,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2023-08-27 15:34:05,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2023-08-27 15:34:05,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 6126 transitions. [2023-08-27 15:34:05,571 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.25514369012911287 [2023-08-27 15:34:05,571 INFO L72 ComplementDD]: Start complementDD. Operand 49 states and 6126 transitions. [2023-08-27 15:34:05,571 INFO L73 IsDeterministic]: Start isDeterministic. Operand 49 states and 6126 transitions. [2023-08-27 15:34:05,575 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 15:34:05,575 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 49 states and 6126 transitions. [2023-08-27 15:34:05,646 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 50 states, 49 states have (on average 125.0204081632653) internal successors, (6126), 49 states have internal predecessors, (6126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 15:34:05,674 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 50 states, 50 states have (on average 490.0) internal successors, (24500), 50 states have internal predecessors, (24500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 15:34:05,679 INFO L81 ComplementDD]: Finished complementDD. Result has 50 states, 50 states have (on average 490.0) internal successors, (24500), 50 states have internal predecessors, (24500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 15:34:05,679 INFO L175 Difference]: Start difference. First operand has 52 places, 46 transitions, 313 flow. Second operand 49 states and 6126 transitions. [2023-08-27 15:34:05,679 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 100 places, 392 transitions, 2925 flow [2023-08-27 15:34:05,697 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 97 places, 392 transitions, 2746 flow, removed 4 selfloop flow, removed 3 redundant places. [2023-08-27 15:34:05,702 INFO L231 Difference]: Finished difference. Result has 118 places, 172 transitions, 1675 flow [2023-08-27 15:34:05,703 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=490, PETRI_DIFFERENCE_MINUEND_FLOW=281, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=11, PETRI_DIFFERENCE_SUBTRAHEND_STATES=49, PETRI_FLOW=1675, PETRI_PLACES=118, PETRI_TRANSITIONS=172} [2023-08-27 15:34:05,704 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 95 predicate places. [2023-08-27 15:34:05,704 INFO L495 AbstractCegarLoop]: Abstraction has has 118 places, 172 transitions, 1675 flow [2023-08-27 15:34:05,705 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 120.18181818181819) internal successors, (2644), 22 states have internal predecessors, (2644), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 15:34:05,705 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 15:34:05,705 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 15:34:05,716 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-08-27 15:34:05,910 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 15:34:05,911 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 15:34:05,911 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 15:34:05,911 INFO L85 PathProgramCache]: Analyzing trace with hash 1533614192, now seen corresponding path program 2 times [2023-08-27 15:34:05,911 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 15:34:05,911 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1623215378] [2023-08-27 15:34:05,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 15:34:05,912 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 15:34:05,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 15:34:06,166 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 15:34:06,167 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 15:34:06,167 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1623215378] [2023-08-27 15:34:06,167 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1623215378] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 15:34:06,167 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [335824773] [2023-08-27 15:34:06,167 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-27 15:34:06,167 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 15:34:06,168 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 15:34:06,169 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 15:34:06,171 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 15:34:06,316 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-27 15:34:06,316 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 15:34:06,318 INFO L262 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 41 conjunts are in the unsatisfiable core [2023-08-27 15:34:06,321 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 15:34:06,363 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 15:34:06,416 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 15:34:06,452 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 15:34:07,054 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-27 15:34:07,065 INFO L322 Elim1Store]: treesize reduction 15, result has 31.8 percent of original size [2023-08-27 15:34:07,065 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 41 treesize of output 24 [2023-08-27 15:34:07,101 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 15:34:07,101 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 15:34:12,086 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 15:34:12,087 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 276 treesize of output 168 [2023-08-27 15:34:12,115 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 15:34:12,116 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 466 treesize of output 466 [2023-08-27 15:34:12,159 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 15:34:12,159 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 386 treesize of output 346 [2023-08-27 15:34:12,216 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 15:34:12,216 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 161 treesize of output 181 [2023-08-27 15:34:14,163 INFO L209 tifierPushTermWalker]: Run 10 iterations without descend maybe there is a nontermination bug. [2023-08-27 15:34:14,470 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 15:34:14,470 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [335824773] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 15:34:14,470 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 15:34:14,470 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8, 8] total 22 [2023-08-27 15:34:14,471 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2116936335] [2023-08-27 15:34:14,471 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 15:34:14,471 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-08-27 15:34:14,472 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 15:34:14,472 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-08-27 15:34:14,472 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=359, Unknown=2, NotChecked=0, Total=462 [2023-08-27 15:34:14,474 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 118 out of 490 [2023-08-27 15:34:14,476 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 118 places, 172 transitions, 1675 flow. Second operand has 22 states, 22 states have (on average 120.18181818181819) internal successors, (2644), 22 states have internal predecessors, (2644), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 15:34:14,476 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 15:34:14,476 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 118 of 490 [2023-08-27 15:34:14,476 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 15:34:22,738 WARN L234 SmtUtils]: Spent 8.14s on a formula simplification. DAG size of input: 53 DAG size of output: 50 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-27 15:34:35,169 WARN L234 SmtUtils]: Spent 12.30s on a formula simplification. DAG size of input: 55 DAG size of output: 52 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-27 15:34:57,253 WARN L234 SmtUtils]: Spent 6.34s on a formula simplification. DAG size of input: 101 DAG size of output: 95 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-27 15:35:07,144 INFO L124 PetriNetUnfolderBase]: 614/1337 cut-off events. [2023-08-27 15:35:07,144 INFO L125 PetriNetUnfolderBase]: For 9288/9288 co-relation queries the response was YES. [2023-08-27 15:35:07,149 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6967 conditions, 1337 events. 614/1337 cut-off events. For 9288/9288 co-relation queries the response was YES. Maximal size of possible extension queue 121. Compared 8734 event pairs, 30 based on Foata normal form. 10/1321 useless extension candidates. Maximal degree in co-relation 6924. Up to 545 conditions per place. [2023-08-27 15:35:07,155 INFO L140 encePairwiseOnDemand]: 479/490 looper letters, 179 selfloop transitions, 149 changer transitions 30/358 dead transitions. [2023-08-27 15:35:07,156 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 162 places, 358 transitions, 3483 flow [2023-08-27 15:35:07,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2023-08-27 15:35:07,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2023-08-27 15:35:07,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 6284 transitions. [2023-08-27 15:35:07,171 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2514605842336935 [2023-08-27 15:35:07,171 INFO L72 ComplementDD]: Start complementDD. Operand 51 states and 6284 transitions. [2023-08-27 15:35:07,171 INFO L73 IsDeterministic]: Start isDeterministic. Operand 51 states and 6284 transitions. [2023-08-27 15:35:07,174 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 15:35:07,174 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 51 states and 6284 transitions. [2023-08-27 15:35:07,187 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 52 states, 51 states have (on average 123.2156862745098) internal successors, (6284), 51 states have internal predecessors, (6284), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 15:35:07,215 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 52 states, 52 states have (on average 490.0) internal successors, (25480), 52 states have internal predecessors, (25480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 15:35:07,221 INFO L81 ComplementDD]: Finished complementDD. Result has 52 states, 52 states have (on average 490.0) internal successors, (25480), 52 states have internal predecessors, (25480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 15:35:07,222 INFO L175 Difference]: Start difference. First operand has 118 places, 172 transitions, 1675 flow. Second operand 51 states and 6284 transitions. [2023-08-27 15:35:07,222 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 162 places, 358 transitions, 3483 flow [2023-08-27 15:35:07,264 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 153 places, 358 transitions, 2980 flow, removed 212 selfloop flow, removed 9 redundant places. [2023-08-27 15:35:07,268 INFO L231 Difference]: Finished difference. Result has 165 places, 214 transitions, 2182 flow [2023-08-27 15:35:07,268 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=490, PETRI_DIFFERENCE_MINUEND_FLOW=1322, PETRI_DIFFERENCE_MINUEND_PLACES=103, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=172, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=108, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=51, PETRI_FLOW=2182, PETRI_PLACES=165, PETRI_TRANSITIONS=214} [2023-08-27 15:35:07,269 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 142 predicate places. [2023-08-27 15:35:07,269 INFO L495 AbstractCegarLoop]: Abstraction has has 165 places, 214 transitions, 2182 flow [2023-08-27 15:35:07,270 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 120.18181818181819) internal successors, (2644), 22 states have internal predecessors, (2644), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 15:35:07,270 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 15:35:07,270 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 15:35:07,275 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 15:35:07,473 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 15:35:07,473 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 15:35:07,473 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 15:35:07,473 INFO L85 PathProgramCache]: Analyzing trace with hash 1823467490, now seen corresponding path program 3 times [2023-08-27 15:35:07,473 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 15:35:07,473 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [254482408] [2023-08-27 15:35:07,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 15:35:07,474 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 15:35:07,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 15:35:07,688 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 15:35:07,688 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 15:35:07,688 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [254482408] [2023-08-27 15:35:07,688 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [254482408] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 15:35:07,688 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [110018165] [2023-08-27 15:35:07,688 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-27 15:35:07,688 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 15:35:07,689 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 15:35:07,690 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 15:35:07,693 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 15:35:07,813 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-08-27 15:35:07,813 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 15:35:07,815 INFO L262 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 30 conjunts are in the unsatisfiable core [2023-08-27 15:35:07,817 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 15:35:08,165 INFO L322 Elim1Store]: treesize reduction 22, result has 12.0 percent of original size [2023-08-27 15:35:08,165 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 323 treesize of output 302 [2023-08-27 15:35:08,304 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 15:35:08,304 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 15:35:13,516 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 15:35:13,517 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 433 treesize of output 314 [2023-08-27 15:35:18,100 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 15:35:18,100 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [110018165] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 15:35:18,100 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 15:35:18,100 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 20 [2023-08-27 15:35:18,101 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [730254275] [2023-08-27 15:35:18,101 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 15:35:18,101 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-08-27 15:35:18,101 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 15:35:18,102 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-08-27 15:35:18,102 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=299, Unknown=0, NotChecked=0, Total=380 [2023-08-27 15:35:18,104 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 125 out of 490 [2023-08-27 15:35:18,105 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 165 places, 214 transitions, 2182 flow. Second operand has 20 states, 20 states have (on average 127.4) internal successors, (2548), 20 states have internal predecessors, (2548), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 15:35:18,105 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 15:35:18,106 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 125 of 490 [2023-08-27 15:35:18,106 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 15:35:21,401 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.08s for a HTC check with result VALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-27 15:35:25,984 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.44s for a HTC check with result VALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-27 15:35:26,200 INFO L124 PetriNetUnfolderBase]: 571/1231 cut-off events. [2023-08-27 15:35:26,200 INFO L125 PetriNetUnfolderBase]: For 8869/8869 co-relation queries the response was YES. [2023-08-27 15:35:26,206 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6663 conditions, 1231 events. 571/1231 cut-off events. For 8869/8869 co-relation queries the response was YES. Maximal size of possible extension queue 109. Compared 7740 event pairs, 132 based on Foata normal form. 11/1231 useless extension candidates. Maximal degree in co-relation 6613. Up to 857 conditions per place. [2023-08-27 15:35:26,211 INFO L140 encePairwiseOnDemand]: 480/490 looper letters, 186 selfloop transitions, 90 changer transitions 13/289 dead transitions. [2023-08-27 15:35:26,212 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 187 places, 289 transitions, 3132 flow [2023-08-27 15:35:26,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2023-08-27 15:35:26,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2023-08-27 15:35:26,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 3656 transitions. [2023-08-27 15:35:26,217 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2664723032069971 [2023-08-27 15:35:26,217 INFO L72 ComplementDD]: Start complementDD. Operand 28 states and 3656 transitions. [2023-08-27 15:35:26,218 INFO L73 IsDeterministic]: Start isDeterministic. Operand 28 states and 3656 transitions. [2023-08-27 15:35:26,218 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 15:35:26,219 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 28 states and 3656 transitions. [2023-08-27 15:35:26,223 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 29 states, 28 states have (on average 130.57142857142858) internal successors, (3656), 28 states have internal predecessors, (3656), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 15:35:26,232 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 29 states, 29 states have (on average 490.0) internal successors, (14210), 29 states have internal predecessors, (14210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 15:35:26,233 INFO L81 ComplementDD]: Finished complementDD. Result has 29 states, 29 states have (on average 490.0) internal successors, (14210), 29 states have internal predecessors, (14210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 15:35:26,233 INFO L175 Difference]: Start difference. First operand has 165 places, 214 transitions, 2182 flow. Second operand 28 states and 3656 transitions. [2023-08-27 15:35:26,233 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 187 places, 289 transitions, 3132 flow [2023-08-27 15:35:26,284 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 160 places, 289 transitions, 2782 flow, removed 81 selfloop flow, removed 27 redundant places. [2023-08-27 15:35:26,289 INFO L231 Difference]: Finished difference. Result has 166 places, 223 transitions, 2176 flow [2023-08-27 15:35:26,289 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=490, PETRI_DIFFERENCE_MINUEND_FLOW=1836, PETRI_DIFFERENCE_MINUEND_PLACES=133, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=213, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=80, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=124, PETRI_DIFFERENCE_SUBTRAHEND_STATES=28, PETRI_FLOW=2176, PETRI_PLACES=166, PETRI_TRANSITIONS=223} [2023-08-27 15:35:26,290 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 143 predicate places. [2023-08-27 15:35:26,290 INFO L495 AbstractCegarLoop]: Abstraction has has 166 places, 223 transitions, 2176 flow [2023-08-27 15:35:26,290 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 127.4) internal successors, (2548), 20 states have internal predecessors, (2548), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 15:35:26,290 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 15:35:26,291 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 15:35:26,296 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 15:35:26,496 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,SelfDestructingSolverStorable13 [2023-08-27 15:35:26,496 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 15:35:26,497 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 15:35:26,497 INFO L85 PathProgramCache]: Analyzing trace with hash 177802652, now seen corresponding path program 4 times [2023-08-27 15:35:26,497 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 15:35:26,497 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1352527317] [2023-08-27 15:35:26,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 15:35:26,497 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 15:35:26,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 15:35:26,729 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 15:35:26,730 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 15:35:26,730 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1352527317] [2023-08-27 15:35:26,730 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1352527317] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 15:35:26,730 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [310793537] [2023-08-27 15:35:26,730 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-27 15:35:26,730 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 15:35:26,730 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 15:35:26,731 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 15:35:26,737 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 15:35:26,827 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-27 15:35:26,827 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 15:35:26,829 INFO L262 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 41 conjunts are in the unsatisfiable core [2023-08-27 15:35:26,834 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 15:35:26,876 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 15:35:26,920 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 15:35:27,032 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-27 15:35:27,033 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 15:35:27,243 INFO L322 Elim1Store]: treesize reduction 22, result has 12.0 percent of original size [2023-08-27 15:35:27,244 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 327 treesize of output 306 [2023-08-27 15:35:27,404 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 15:35:27,404 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 15:35:30,725 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 15:35:30,725 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 273 treesize of output 165 [2023-08-27 15:35:30,755 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 15:35:30,756 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 1306 treesize of output 1130 [2023-08-27 15:35:30,810 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 15:35:30,810 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 228 treesize of output 242 [2023-08-27 15:35:30,849 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 15:35:30,849 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 209 treesize of output 149 [2023-08-27 15:35:35,087 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 15:35:35,087 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [310793537] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 15:35:35,087 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 15:35:35,087 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8, 8] total 22 [2023-08-27 15:35:35,088 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1614539466] [2023-08-27 15:35:35,088 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 15:35:35,088 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-08-27 15:35:35,088 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 15:35:35,089 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-08-27 15:35:35,089 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=379, Unknown=1, NotChecked=0, Total=462 [2023-08-27 15:35:35,091 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 118 out of 490 [2023-08-27 15:35:35,092 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 166 places, 223 transitions, 2176 flow. Second operand has 22 states, 22 states have (on average 120.18181818181819) internal successors, (2644), 22 states have internal predecessors, (2644), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 15:35:35,092 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 15:35:35,092 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 118 of 490 [2023-08-27 15:35:35,092 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 15:35:47,520 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.86s for a HTC check with result VALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-27 15:36:02,474 WARN L234 SmtUtils]: Spent 14.08s on a formula simplification. DAG size of input: 118 DAG size of output: 107 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-27 15:36:13,031 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.27s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-27 15:36:16,478 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-27 15:36:18,836 INFO L124 PetriNetUnfolderBase]: 682/1431 cut-off events. [2023-08-27 15:36:18,837 INFO L125 PetriNetUnfolderBase]: For 9101/9101 co-relation queries the response was YES. [2023-08-27 15:36:18,842 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7522 conditions, 1431 events. 682/1431 cut-off events. For 9101/9101 co-relation queries the response was YES. Maximal size of possible extension queue 128. Compared 9150 event pairs, 62 based on Foata normal form. 23/1437 useless extension candidates. Maximal degree in co-relation 7475. Up to 387 conditions per place. [2023-08-27 15:36:18,847 INFO L140 encePairwiseOnDemand]: 479/490 looper letters, 142 selfloop transitions, 154 changer transitions 88/384 dead transitions. [2023-08-27 15:36:18,847 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 203 places, 384 transitions, 4102 flow [2023-08-27 15:36:18,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2023-08-27 15:36:18,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2023-08-27 15:36:18,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 4945 transitions. [2023-08-27 15:36:18,854 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.25229591836734694 [2023-08-27 15:36:18,854 INFO L72 ComplementDD]: Start complementDD. Operand 40 states and 4945 transitions. [2023-08-27 15:36:18,854 INFO L73 IsDeterministic]: Start isDeterministic. Operand 40 states and 4945 transitions. [2023-08-27 15:36:18,855 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 15:36:18,855 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 40 states and 4945 transitions. [2023-08-27 15:36:18,861 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 41 states, 40 states have (on average 123.625) internal successors, (4945), 40 states have internal predecessors, (4945), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 15:36:18,875 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 41 states, 41 states have (on average 490.0) internal successors, (20090), 41 states have internal predecessors, (20090), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 15:36:18,876 INFO L81 ComplementDD]: Finished complementDD. Result has 41 states, 41 states have (on average 490.0) internal successors, (20090), 41 states have internal predecessors, (20090), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 15:36:18,877 INFO L175 Difference]: Start difference. First operand has 166 places, 223 transitions, 2176 flow. Second operand 40 states and 4945 transitions. [2023-08-27 15:36:18,877 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 203 places, 384 transitions, 4102 flow [2023-08-27 15:36:18,935 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 182 places, 384 transitions, 3907 flow, removed 32 selfloop flow, removed 21 redundant places. [2023-08-27 15:36:18,940 INFO L231 Difference]: Finished difference. Result has 193 places, 217 transitions, 2480 flow [2023-08-27 15:36:18,940 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=490, PETRI_DIFFERENCE_MINUEND_FLOW=1989, PETRI_DIFFERENCE_MINUEND_PLACES=143, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=223, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=131, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=87, PETRI_DIFFERENCE_SUBTRAHEND_STATES=40, PETRI_FLOW=2480, PETRI_PLACES=193, PETRI_TRANSITIONS=217} [2023-08-27 15:36:18,941 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 170 predicate places. [2023-08-27 15:36:18,941 INFO L495 AbstractCegarLoop]: Abstraction has has 193 places, 217 transitions, 2480 flow [2023-08-27 15:36:18,942 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 120.18181818181819) internal successors, (2644), 22 states have internal predecessors, (2644), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 15:36:18,942 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 15:36:18,942 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 15:36:18,947 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2023-08-27 15:36:19,147 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-08-27 15:36:19,147 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 15:36:19,148 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 15:36:19,148 INFO L85 PathProgramCache]: Analyzing trace with hash -1207054232, now seen corresponding path program 5 times [2023-08-27 15:36:19,148 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 15:36:19,148 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [964620567] [2023-08-27 15:36:19,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 15:36:19,148 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 15:36:19,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 15:36:19,350 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 15:36:19,350 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 15:36:19,350 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [964620567] [2023-08-27 15:36:19,350 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [964620567] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 15:36:19,350 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [523180529] [2023-08-27 15:36:19,350 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-27 15:36:19,351 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 15:36:19,351 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 15:36:19,352 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 15:36:19,357 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 15:36:19,471 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-27 15:36:19,471 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 15:36:19,473 INFO L262 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 41 conjunts are in the unsatisfiable core [2023-08-27 15:36:19,476 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 15:36:19,511 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 15:36:19,547 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 15:36:19,572 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 15:36:19,838 INFO L322 Elim1Store]: treesize reduction 22, result has 12.0 percent of original size [2023-08-27 15:36:19,838 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 323 treesize of output 302 [2023-08-27 15:36:19,966 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 15:36:19,966 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 15:36:28,575 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 15:36:28,576 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 276 treesize of output 168 [2023-08-27 15:36:28,605 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 15:36:28,605 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 466 treesize of output 466 [2023-08-27 15:36:28,656 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 15:36:28,657 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 386 treesize of output 346 [2023-08-27 15:36:28,712 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 15:36:28,713 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 161 treesize of output 181 [2023-08-27 15:36:31,120 INFO L209 tifierPushTermWalker]: Run 10 iterations without descend maybe there is a nontermination bug. [2023-08-27 15:36:31,357 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 15:36:31,358 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [523180529] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 15:36:31,358 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 15:36:31,358 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8, 8] total 22 [2023-08-27 15:36:31,358 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1098199134] [2023-08-27 15:36:31,358 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 15:36:31,358 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-08-27 15:36:31,358 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 15:36:31,359 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-08-27 15:36:31,359 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=360, Unknown=2, NotChecked=0, Total=462 [2023-08-27 15:36:31,361 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 118 out of 490 [2023-08-27 15:36:31,363 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 193 places, 217 transitions, 2480 flow. Second operand has 22 states, 22 states have (on average 120.18181818181819) internal successors, (2644), 22 states have internal predecessors, (2644), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 15:36:31,363 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 15:36:31,363 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 118 of 490 [2023-08-27 15:36:31,363 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 15:36:37,619 WARN L234 SmtUtils]: Spent 6.08s on a formula simplification. DAG size of input: 53 DAG size of output: 50 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-27 15:36:47,174 WARN L234 SmtUtils]: Spent 6.41s on a formula simplification that was a NOOP. DAG size: 106 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-27 15:36:51,068 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 15:36:54,479 INFO L124 PetriNetUnfolderBase]: 468/949 cut-off events. [2023-08-27 15:36:54,479 INFO L125 PetriNetUnfolderBase]: For 7491/7491 co-relation queries the response was YES. [2023-08-27 15:36:54,482 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5554 conditions, 949 events. 468/949 cut-off events. For 7491/7491 co-relation queries the response was YES. Maximal size of possible extension queue 84. Compared 5281 event pairs, 39 based on Foata normal form. 14/962 useless extension candidates. Maximal degree in co-relation 5495. Up to 496 conditions per place. [2023-08-27 15:36:54,486 INFO L140 encePairwiseOnDemand]: 479/490 looper letters, 165 selfloop transitions, 119 changer transitions 23/307 dead transitions. [2023-08-27 15:36:54,486 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 208 places, 307 transitions, 3578 flow [2023-08-27 15:36:54,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2023-08-27 15:36:54,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2023-08-27 15:36:54,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 4078 transitions. [2023-08-27 15:36:54,492 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.25219542362399505 [2023-08-27 15:36:54,493 INFO L72 ComplementDD]: Start complementDD. Operand 33 states and 4078 transitions. [2023-08-27 15:36:54,493 INFO L73 IsDeterministic]: Start isDeterministic. Operand 33 states and 4078 transitions. [2023-08-27 15:36:54,494 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 15:36:54,494 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 33 states and 4078 transitions. [2023-08-27 15:36:54,498 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 34 states, 33 states have (on average 123.57575757575758) internal successors, (4078), 33 states have internal predecessors, (4078), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 15:36:54,509 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 34 states, 34 states have (on average 490.0) internal successors, (16660), 34 states have internal predecessors, (16660), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 15:36:54,510 INFO L81 ComplementDD]: Finished complementDD. Result has 34 states, 34 states have (on average 490.0) internal successors, (16660), 34 states have internal predecessors, (16660), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 15:36:54,510 INFO L175 Difference]: Start difference. First operand has 193 places, 217 transitions, 2480 flow. Second operand 33 states and 4078 transitions. [2023-08-27 15:36:54,510 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 208 places, 307 transitions, 3578 flow [2023-08-27 15:36:54,557 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 178 places, 307 transitions, 3148 flow, removed 149 selfloop flow, removed 30 redundant places. [2023-08-27 15:36:54,562 INFO L231 Difference]: Finished difference. Result has 185 places, 218 transitions, 2466 flow [2023-08-27 15:36:54,562 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=490, PETRI_DIFFERENCE_MINUEND_FLOW=2114, PETRI_DIFFERENCE_MINUEND_PLACES=146, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=215, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=111, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=99, PETRI_DIFFERENCE_SUBTRAHEND_STATES=33, PETRI_FLOW=2466, PETRI_PLACES=185, PETRI_TRANSITIONS=218} [2023-08-27 15:36:54,562 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 162 predicate places. [2023-08-27 15:36:54,563 INFO L495 AbstractCegarLoop]: Abstraction has has 185 places, 218 transitions, 2466 flow [2023-08-27 15:36:54,563 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 120.18181818181819) internal successors, (2644), 22 states have internal predecessors, (2644), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 15:36:54,563 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 15:36:54,563 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 15:36:54,569 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 15:36:54,768 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 15:36:54,769 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 15:36:54,769 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 15:36:54,769 INFO L85 PathProgramCache]: Analyzing trace with hash -1496907530, now seen corresponding path program 6 times [2023-08-27 15:36:54,769 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 15:36:54,769 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1476413010] [2023-08-27 15:36:54,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 15:36:54,769 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 15:36:54,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 15:36:54,978 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 15:36:54,978 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 15:36:54,978 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1476413010] [2023-08-27 15:36:54,978 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1476413010] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 15:36:54,979 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1015874597] [2023-08-27 15:36:54,979 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-27 15:36:54,979 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 15:36:54,979 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 15:36:54,980 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 15:36:54,985 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 15:36:55,141 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2023-08-27 15:36:55,142 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 15:36:55,143 INFO L262 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 30 conjunts are in the unsatisfiable core [2023-08-27 15:36:55,146 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 15:36:55,542 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-27 15:36:55,549 INFO L322 Elim1Store]: treesize reduction 15, result has 31.8 percent of original size [2023-08-27 15:36:55,550 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 41 treesize of output 24 [2023-08-27 15:36:55,587 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 15:36:55,587 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 15:36:55,939 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 15:36:55,939 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 4 new quantified variables, introduced 6 case distinctions, treesize of input 418 treesize of output 426 [2023-08-27 15:37:01,012 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 15:37:01,013 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1015874597] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 15:37:01,013 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 15:37:01,013 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 20 [2023-08-27 15:37:01,013 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [170223711] [2023-08-27 15:37:01,013 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 15:37:01,013 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-08-27 15:37:01,014 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 15:37:01,014 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-08-27 15:37:01,014 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=294, Unknown=0, NotChecked=0, Total=380 [2023-08-27 15:37:01,015 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 125 out of 490 [2023-08-27 15:37:01,016 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 185 places, 218 transitions, 2466 flow. Second operand has 20 states, 20 states have (on average 127.4) internal successors, (2548), 20 states have internal predecessors, (2548), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 15:37:01,016 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 15:37:01,017 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 125 of 490 [2023-08-27 15:37:01,017 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 15:37:02,346 INFO L124 PetriNetUnfolderBase]: 453/900 cut-off events. [2023-08-27 15:37:02,346 INFO L125 PetriNetUnfolderBase]: For 5817/5817 co-relation queries the response was YES. [2023-08-27 15:37:02,350 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5184 conditions, 900 events. 453/900 cut-off events. For 5817/5817 co-relation queries the response was YES. Maximal size of possible extension queue 79. Compared 4816 event pairs, 11 based on Foata normal form. 6/905 useless extension candidates. Maximal degree in co-relation 5129. Up to 432 conditions per place. [2023-08-27 15:37:02,356 INFO L140 encePairwiseOnDemand]: 480/490 looper letters, 143 selfloop transitions, 144 changer transitions 4/291 dead transitions. [2023-08-27 15:37:02,356 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 215 places, 291 transitions, 3326 flow [2023-08-27 15:37:02,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2023-08-27 15:37:02,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2023-08-27 15:37:02,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 4415 transitions. [2023-08-27 15:37:02,362 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2650060024009604 [2023-08-27 15:37:02,362 INFO L72 ComplementDD]: Start complementDD. Operand 34 states and 4415 transitions. [2023-08-27 15:37:02,362 INFO L73 IsDeterministic]: Start isDeterministic. Operand 34 states and 4415 transitions. [2023-08-27 15:37:02,363 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 15:37:02,363 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 34 states and 4415 transitions. [2023-08-27 15:37:02,368 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 35 states, 34 states have (on average 129.85294117647058) internal successors, (4415), 34 states have internal predecessors, (4415), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 15:37:02,379 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 35 states, 35 states have (on average 490.0) internal successors, (17150), 35 states have internal predecessors, (17150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 15:37:02,381 INFO L81 ComplementDD]: Finished complementDD. Result has 35 states, 35 states have (on average 490.0) internal successors, (17150), 35 states have internal predecessors, (17150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 15:37:02,381 INFO L175 Difference]: Start difference. First operand has 185 places, 218 transitions, 2466 flow. Second operand 34 states and 4415 transitions. [2023-08-27 15:37:02,381 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 215 places, 291 transitions, 3326 flow [2023-08-27 15:37:02,418 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 194 places, 291 transitions, 3000 flow, removed 46 selfloop flow, removed 21 redundant places. [2023-08-27 15:37:02,422 INFO L231 Difference]: Finished difference. Result has 194 places, 222 transitions, 2494 flow [2023-08-27 15:37:02,422 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=490, PETRI_DIFFERENCE_MINUEND_FLOW=2152, PETRI_DIFFERENCE_MINUEND_PLACES=161, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=218, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=139, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=79, PETRI_DIFFERENCE_SUBTRAHEND_STATES=34, PETRI_FLOW=2494, PETRI_PLACES=194, PETRI_TRANSITIONS=222} [2023-08-27 15:37:02,422 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 171 predicate places. [2023-08-27 15:37:02,422 INFO L495 AbstractCegarLoop]: Abstraction has has 194 places, 222 transitions, 2494 flow [2023-08-27 15:37:02,423 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 127.4) internal successors, (2548), 20 states have internal predecessors, (2548), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 15:37:02,423 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 15:37:02,423 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 15:37:02,438 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2023-08-27 15:37:02,630 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-08-27 15:37:02,631 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 15:37:02,631 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 15:37:02,632 INFO L85 PathProgramCache]: Analyzing trace with hash -1807820928, now seen corresponding path program 7 times [2023-08-27 15:37:02,632 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 15:37:02,632 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1059068720] [2023-08-27 15:37:02,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 15:37:02,632 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 15:37:02,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 15:37:02,803 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 15:37:02,804 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 15:37:02,804 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1059068720] [2023-08-27 15:37:02,804 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1059068720] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 15:37:02,804 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [679511241] [2023-08-27 15:37:02,804 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-27 15:37:02,804 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 15:37:02,804 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 15:37:02,805 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 15:37:02,808 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 15:37:02,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 15:37:02,907 INFO L262 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 41 conjunts are in the unsatisfiable core [2023-08-27 15:37:02,911 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 15:37:02,963 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 15:37:02,994 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 15:37:03,035 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 15:37:03,469 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-27 15:37:03,476 INFO L322 Elim1Store]: treesize reduction 15, result has 31.8 percent of original size [2023-08-27 15:37:03,476 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 41 treesize of output 24 [2023-08-27 15:37:03,505 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 15:37:03,507 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 15:37:09,385 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 15:37:09,385 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 276 treesize of output 168 [2023-08-27 15:37:09,418 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 15:37:09,418 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 986 treesize of output 906 [2023-08-27 15:37:09,457 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 15:37:09,458 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 221 treesize of output 181 [2023-08-27 15:37:09,794 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 15:37:09,795 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 166 treesize of output 186 [2023-08-27 15:37:10,740 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 15:37:10,740 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [679511241] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 15:37:10,740 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 15:37:10,740 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8, 8] total 22 [2023-08-27 15:37:10,741 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [398629588] [2023-08-27 15:37:10,741 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 15:37:10,741 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-08-27 15:37:10,741 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 15:37:10,741 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-08-27 15:37:10,742 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=367, Unknown=2, NotChecked=0, Total=462 [2023-08-27 15:37:10,743 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 118 out of 490 [2023-08-27 15:37:10,744 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 194 places, 222 transitions, 2494 flow. Second operand has 22 states, 22 states have (on average 120.18181818181819) internal successors, (2644), 22 states have internal predecessors, (2644), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 15:37:10,744 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 15:37:10,744 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 118 of 490 [2023-08-27 15:37:10,744 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 15:37:14,968 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 15:37:23,946 INFO L124 PetriNetUnfolderBase]: 455/902 cut-off events. [2023-08-27 15:37:23,946 INFO L125 PetriNetUnfolderBase]: For 5016/5016 co-relation queries the response was YES. [2023-08-27 15:37:23,948 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5216 conditions, 902 events. 455/902 cut-off events. For 5016/5016 co-relation queries the response was YES. Maximal size of possible extension queue 83. Compared 4822 event pairs, 6 based on Foata normal form. 10/911 useless extension candidates. Maximal degree in co-relation 5168. Up to 306 conditions per place. [2023-08-27 15:37:23,952 INFO L140 encePairwiseOnDemand]: 479/490 looper letters, 138 selfloop transitions, 140 changer transitions 37/315 dead transitions. [2023-08-27 15:37:23,952 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 227 places, 315 transitions, 3498 flow [2023-08-27 15:37:23,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2023-08-27 15:37:23,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2023-08-27 15:37:23,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 4426 transitions. [2023-08-27 15:37:23,962 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.25090702947845805 [2023-08-27 15:37:23,962 INFO L72 ComplementDD]: Start complementDD. Operand 36 states and 4426 transitions. [2023-08-27 15:37:23,962 INFO L73 IsDeterministic]: Start isDeterministic. Operand 36 states and 4426 transitions. [2023-08-27 15:37:23,963 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 15:37:23,963 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 36 states and 4426 transitions. [2023-08-27 15:37:23,968 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 37 states, 36 states have (on average 122.94444444444444) internal successors, (4426), 36 states have internal predecessors, (4426), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 15:37:23,979 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 37 states, 37 states have (on average 490.0) internal successors, (18130), 37 states have internal predecessors, (18130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 15:37:23,980 INFO L81 ComplementDD]: Finished complementDD. Result has 37 states, 37 states have (on average 490.0) internal successors, (18130), 37 states have internal predecessors, (18130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 15:37:23,980 INFO L175 Difference]: Start difference. First operand has 194 places, 222 transitions, 2494 flow. Second operand 36 states and 4426 transitions. [2023-08-27 15:37:23,980 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 227 places, 315 transitions, 3498 flow [2023-08-27 15:37:24,014 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 206 places, 315 transitions, 3330 flow, removed 31 selfloop flow, removed 21 redundant places. [2023-08-27 15:37:24,019 INFO L231 Difference]: Finished difference. Result has 210 places, 207 transitions, 2491 flow [2023-08-27 15:37:24,019 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=490, PETRI_DIFFERENCE_MINUEND_FLOW=2330, PETRI_DIFFERENCE_MINUEND_PLACES=171, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=222, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=135, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=86, PETRI_DIFFERENCE_SUBTRAHEND_STATES=36, PETRI_FLOW=2491, PETRI_PLACES=210, PETRI_TRANSITIONS=207} [2023-08-27 15:37:24,019 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 187 predicate places. [2023-08-27 15:37:24,019 INFO L495 AbstractCegarLoop]: Abstraction has has 210 places, 207 transitions, 2491 flow [2023-08-27 15:37:24,020 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 120.18181818181819) internal successors, (2644), 22 states have internal predecessors, (2644), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 15:37:24,020 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 15:37:24,020 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 15:37:24,028 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 15:37:24,225 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-08-27 15:37:24,226 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 15:37:24,226 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 15:37:24,226 INFO L85 PathProgramCache]: Analyzing trace with hash 2104017923, now seen corresponding path program 1 times [2023-08-27 15:37:24,226 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 15:37:24,226 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1744913372] [2023-08-27 15:37:24,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 15:37:24,226 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 15:37:24,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 15:37:24,432 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-27 15:37:24,432 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 15:37:24,433 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1744913372] [2023-08-27 15:37:24,433 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1744913372] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 15:37:24,433 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1581123725] [2023-08-27 15:37:24,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 15:37:24,433 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 15:37:24,433 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 15:37:24,434 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 15:37:24,441 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 15:37:24,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 15:37:24,645 INFO L262 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 9 conjunts are in the unsatisfiable core [2023-08-27 15:37:24,651 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 15:37:24,802 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-27 15:37:24,802 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 15:37:24,936 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 114 treesize of output 106 [2023-08-27 15:37:25,022 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 112 treesize of output 104 [2023-08-27 15:37:25,194 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-27 15:37:25,194 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1581123725] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 15:37:25,194 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 15:37:25,194 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 11 [2023-08-27 15:37:25,194 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1058802578] [2023-08-27 15:37:25,194 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 15:37:25,194 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-08-27 15:37:25,194 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 15:37:25,195 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-08-27 15:37:25,195 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2023-08-27 15:37:25,196 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 178 out of 490 [2023-08-27 15:37:25,196 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 210 places, 207 transitions, 2491 flow. Second operand has 11 states, 11 states have (on average 180.45454545454547) internal successors, (1985), 11 states have internal predecessors, (1985), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 15:37:25,197 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 15:37:25,197 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 178 of 490 [2023-08-27 15:37:25,197 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 15:37:26,013 INFO L124 PetriNetUnfolderBase]: 432/847 cut-off events. [2023-08-27 15:37:26,014 INFO L125 PetriNetUnfolderBase]: For 5479/5479 co-relation queries the response was YES. [2023-08-27 15:37:26,017 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5222 conditions, 847 events. 432/847 cut-off events. For 5479/5479 co-relation queries the response was YES. Maximal size of possible extension queue 79. Compared 4399 event pairs, 32 based on Foata normal form. 24/870 useless extension candidates. Maximal degree in co-relation 5172. Up to 205 conditions per place. [2023-08-27 15:37:26,021 INFO L140 encePairwiseOnDemand]: 484/490 looper letters, 134 selfloop transitions, 132 changer transitions 0/266 dead transitions. [2023-08-27 15:37:26,021 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 208 places, 266 transitions, 3451 flow [2023-08-27 15:37:26,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-08-27 15:37:26,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2023-08-27 15:37:26,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 2943 transitions. [2023-08-27 15:37:26,025 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3753826530612245 [2023-08-27 15:37:26,025 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 2943 transitions. [2023-08-27 15:37:26,025 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 2943 transitions. [2023-08-27 15:37:26,026 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 15:37:26,026 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 2943 transitions. [2023-08-27 15:37:26,029 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 183.9375) internal successors, (2943), 16 states have internal predecessors, (2943), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 15:37:26,034 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 490.0) internal successors, (8330), 17 states have internal predecessors, (8330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 15:37:26,034 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 490.0) internal successors, (8330), 17 states have internal predecessors, (8330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 15:37:26,034 INFO L175 Difference]: Start difference. First operand has 210 places, 207 transitions, 2491 flow. Second operand 16 states and 2943 transitions. [2023-08-27 15:37:26,035 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 208 places, 266 transitions, 3451 flow [2023-08-27 15:37:26,068 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 172 places, 266 transitions, 3178 flow, removed 19 selfloop flow, removed 36 redundant places. [2023-08-27 15:37:26,072 INFO L231 Difference]: Finished difference. Result has 175 places, 217 transitions, 2691 flow [2023-08-27 15:37:26,072 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=490, PETRI_DIFFERENCE_MINUEND_FLOW=2230, PETRI_DIFFERENCE_MINUEND_PLACES=157, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=207, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=122, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=81, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=2691, PETRI_PLACES=175, PETRI_TRANSITIONS=217} [2023-08-27 15:37:26,073 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 152 predicate places. [2023-08-27 15:37:26,073 INFO L495 AbstractCegarLoop]: Abstraction has has 175 places, 217 transitions, 2691 flow [2023-08-27 15:37:26,073 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 180.45454545454547) internal successors, (1985), 11 states have internal predecessors, (1985), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 15:37:26,073 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 15:37:26,074 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 15:37:26,079 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-08-27 15:37:26,279 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 15:37:26,279 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 15:37:26,280 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 15:37:26,280 INFO L85 PathProgramCache]: Analyzing trace with hash -178642135, now seen corresponding path program 2 times [2023-08-27 15:37:26,280 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 15:37:26,280 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1838422061] [2023-08-27 15:37:26,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 15:37:26,280 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 15:37:26,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 15:37:26,444 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-27 15:37:26,444 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 15:37:26,444 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1838422061] [2023-08-27 15:37:26,444 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1838422061] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 15:37:26,444 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [327786897] [2023-08-27 15:37:26,444 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-27 15:37:26,445 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 15:37:26,445 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 15:37:26,446 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 15:37:26,453 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 15:37:26,703 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-27 15:37:26,703 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 15:37:26,705 INFO L262 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 9 conjunts are in the unsatisfiable core [2023-08-27 15:37:26,707 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 15:37:26,849 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-27 15:37:26,849 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 15:37:26,986 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 114 treesize of output 106 [2023-08-27 15:37:27,087 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 120 treesize of output 112 [2023-08-27 15:37:27,237 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-27 15:37:27,238 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [327786897] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 15:37:27,238 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 15:37:27,238 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2023-08-27 15:37:27,238 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [654281919] [2023-08-27 15:37:27,238 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 15:37:27,238 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-08-27 15:37:27,238 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 15:37:27,239 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-08-27 15:37:27,239 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2023-08-27 15:37:27,242 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 178 out of 490 [2023-08-27 15:37:27,243 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 175 places, 217 transitions, 2691 flow. Second operand has 12 states, 12 states have (on average 180.33333333333334) internal successors, (2164), 12 states have internal predecessors, (2164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 15:37:27,243 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 15:37:27,243 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 178 of 490 [2023-08-27 15:37:27,243 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 15:37:28,502 INFO L124 PetriNetUnfolderBase]: 496/951 cut-off events. [2023-08-27 15:37:28,502 INFO L125 PetriNetUnfolderBase]: For 8617/8617 co-relation queries the response was YES. [2023-08-27 15:37:28,505 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6209 conditions, 951 events. 496/951 cut-off events. For 8617/8617 co-relation queries the response was YES. Maximal size of possible extension queue 94. Compared 5044 event pairs, 33 based on Foata normal form. 20/970 useless extension candidates. Maximal degree in co-relation 6160. Up to 229 conditions per place. [2023-08-27 15:37:28,510 INFO L140 encePairwiseOnDemand]: 484/490 looper letters, 141 selfloop transitions, 161 changer transitions 0/302 dead transitions. [2023-08-27 15:37:28,510 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 191 places, 302 transitions, 3973 flow [2023-08-27 15:37:28,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-08-27 15:37:28,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2023-08-27 15:37:28,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 3142 transitions. [2023-08-27 15:37:28,513 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3771908763505402 [2023-08-27 15:37:28,513 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 3142 transitions. [2023-08-27 15:37:28,513 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 3142 transitions. [2023-08-27 15:37:28,513 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 15:37:28,514 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 3142 transitions. [2023-08-27 15:37:28,516 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 184.8235294117647) internal successors, (3142), 17 states have internal predecessors, (3142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 15:37:28,521 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 490.0) internal successors, (8820), 18 states have internal predecessors, (8820), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 15:37:28,521 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 490.0) internal successors, (8820), 18 states have internal predecessors, (8820), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 15:37:28,522 INFO L175 Difference]: Start difference. First operand has 175 places, 217 transitions, 2691 flow. Second operand 17 states and 3142 transitions. [2023-08-27 15:37:28,522 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 191 places, 302 transitions, 3973 flow [2023-08-27 15:37:28,572 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 184 places, 302 transitions, 3727 flow, removed 60 selfloop flow, removed 7 redundant places. [2023-08-27 15:37:28,576 INFO L231 Difference]: Finished difference. Result has 187 places, 246 transitions, 3385 flow [2023-08-27 15:37:28,577 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=490, PETRI_DIFFERENCE_MINUEND_FLOW=2476, PETRI_DIFFERENCE_MINUEND_PLACES=168, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=217, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=137, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=3385, PETRI_PLACES=187, PETRI_TRANSITIONS=246} [2023-08-27 15:37:28,577 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 164 predicate places. [2023-08-27 15:37:28,577 INFO L495 AbstractCegarLoop]: Abstraction has has 187 places, 246 transitions, 3385 flow [2023-08-27 15:37:28,577 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 180.33333333333334) internal successors, (2164), 12 states have internal predecessors, (2164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 15:37:28,578 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 15:37:28,578 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 15:37:28,585 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-08-27 15:37:28,783 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 15:37:28,783 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 15:37:28,784 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 15:37:28,784 INFO L85 PathProgramCache]: Analyzing trace with hash 223265457, now seen corresponding path program 3 times [2023-08-27 15:37:28,784 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 15:37:28,784 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [83052681] [2023-08-27 15:37:28,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 15:37:28,784 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 15:37:28,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 15:37:29,026 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-27 15:37:29,027 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 15:37:29,027 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [83052681] [2023-08-27 15:37:29,027 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [83052681] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 15:37:29,027 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [322240934] [2023-08-27 15:37:29,027 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-27 15:37:29,027 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 15:37:29,027 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 15:37:29,028 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 15:37:29,039 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 15:37:29,217 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-08-27 15:37:29,217 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 15:37:29,219 INFO L262 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 9 conjunts are in the unsatisfiable core [2023-08-27 15:37:29,221 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 15:37:29,329 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-27 15:37:29,329 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 15:37:29,414 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 112 treesize of output 104 [2023-08-27 15:37:29,468 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 122 treesize of output 114 [2023-08-27 15:37:29,635 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-27 15:37:29,635 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [322240934] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 15:37:29,635 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 15:37:29,636 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2023-08-27 15:37:29,636 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1173219273] [2023-08-27 15:37:29,636 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 15:37:29,636 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-08-27 15:37:29,636 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 15:37:29,637 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-08-27 15:37:29,637 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2023-08-27 15:37:29,638 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 178 out of 490 [2023-08-27 15:37:29,639 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 187 places, 246 transitions, 3385 flow. Second operand has 12 states, 12 states have (on average 180.33333333333334) internal successors, (2164), 12 states have internal predecessors, (2164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 15:37:29,639 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 15:37:29,639 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 178 of 490 [2023-08-27 15:37:29,639 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 15:37:30,855 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.08s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-27 15:37:32,279 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.41s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-27 15:37:33,109 INFO L124 PetriNetUnfolderBase]: 556/1101 cut-off events. [2023-08-27 15:37:33,110 INFO L125 PetriNetUnfolderBase]: For 10088/10088 co-relation queries the response was YES. [2023-08-27 15:37:33,113 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7489 conditions, 1101 events. 556/1101 cut-off events. For 10088/10088 co-relation queries the response was YES. Maximal size of possible extension queue 112. Compared 6239 event pairs, 50 based on Foata normal form. 24/1124 useless extension candidates. Maximal degree in co-relation 7439. Up to 277 conditions per place. [2023-08-27 15:37:33,118 INFO L140 encePairwiseOnDemand]: 484/490 looper letters, 185 selfloop transitions, 162 changer transitions 0/347 dead transitions. [2023-08-27 15:37:33,118 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 206 places, 347 transitions, 4859 flow [2023-08-27 15:37:33,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-08-27 15:37:33,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2023-08-27 15:37:33,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 3699 transitions. [2023-08-27 15:37:33,121 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3774489795918367 [2023-08-27 15:37:33,121 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 3699 transitions. [2023-08-27 15:37:33,121 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 3699 transitions. [2023-08-27 15:37:33,122 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 15:37:33,122 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 3699 transitions. [2023-08-27 15:37:33,124 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 21 states, 20 states have (on average 184.95) internal successors, (3699), 20 states have internal predecessors, (3699), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 15:37:33,130 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 21 states, 21 states have (on average 490.0) internal successors, (10290), 21 states have internal predecessors, (10290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 15:37:33,130 INFO L81 ComplementDD]: Finished complementDD. Result has 21 states, 21 states have (on average 490.0) internal successors, (10290), 21 states have internal predecessors, (10290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 15:37:33,130 INFO L175 Difference]: Start difference. First operand has 187 places, 246 transitions, 3385 flow. Second operand 20 states and 3699 transitions. [2023-08-27 15:37:33,131 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 206 places, 347 transitions, 4859 flow [2023-08-27 15:37:33,195 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 202 places, 347 transitions, 4487 flow, removed 143 selfloop flow, removed 4 redundant places. [2023-08-27 15:37:33,199 INFO L231 Difference]: Finished difference. Result has 209 places, 273 transitions, 3975 flow [2023-08-27 15:37:33,200 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=490, PETRI_DIFFERENCE_MINUEND_FLOW=3050, PETRI_DIFFERENCE_MINUEND_PLACES=183, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=243, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=137, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=97, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=3975, PETRI_PLACES=209, PETRI_TRANSITIONS=273} [2023-08-27 15:37:33,200 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 186 predicate places. [2023-08-27 15:37:33,200 INFO L495 AbstractCegarLoop]: Abstraction has has 209 places, 273 transitions, 3975 flow [2023-08-27 15:37:33,200 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 180.33333333333334) internal successors, (2164), 12 states have internal predecessors, (2164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 15:37:33,200 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 15:37:33,200 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 15:37:33,205 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 15:37:33,401 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2023-08-27 15:37:33,401 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT (and 2 more)] === [2023-08-27 15:37:33,401 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 15:37:33,401 INFO L85 PathProgramCache]: Analyzing trace with hash -924273079, now seen corresponding path program 4 times [2023-08-27 15:37:33,402 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 15:37:33,402 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [186787057] [2023-08-27 15:37:33,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 15:37:33,402 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 15:37:33,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 15:37:33,906 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-27 15:37:33,906 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 15:37:33,907 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [186787057] [2023-08-27 15:37:33,907 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [186787057] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 15:37:33,907 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1119544241] [2023-08-27 15:37:33,907 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-27 15:37:33,907 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 15:37:33,907 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 15:37:33,908 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 15:37:33,930 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 15:37:34,145 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-27 15:37:34,145 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 15:37:34,146 INFO L262 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 9 conjunts are in the unsatisfiable core [2023-08-27 15:37:34,148 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 15:37:34,314 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 15:37:34,315 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 275 treesize of output 260 [2023-08-27 15:37:34,851 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-27 15:37:34,852 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 15:37:34,992 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 122 treesize of output 114 [2023-08-27 15:37:35,197 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 112 treesize of output 104 [2023-08-27 15:37:35,355 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-27 15:37:35,355 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1119544241] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 15:37:35,355 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 15:37:35,355 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 11 [2023-08-27 15:37:35,356 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [545419706] [2023-08-27 15:37:35,356 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 15:37:35,356 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-08-27 15:37:35,356 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 15:37:35,356 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-08-27 15:37:35,356 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2023-08-27 15:37:35,357 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 178 out of 490 [2023-08-27 15:37:35,358 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 209 places, 273 transitions, 3975 flow. Second operand has 11 states, 11 states have (on average 180.0909090909091) internal successors, (1981), 11 states have internal predecessors, (1981), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 15:37:35,358 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 15:37:35,358 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 178 of 490 [2023-08-27 15:37:35,358 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 15:37:36,979 INFO L124 PetriNetUnfolderBase]: 548/1058 cut-off events. [2023-08-27 15:37:36,979 INFO L125 PetriNetUnfolderBase]: For 7042/7042 co-relation queries the response was YES. [2023-08-27 15:37:36,985 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7162 conditions, 1058 events. 548/1058 cut-off events. For 7042/7042 co-relation queries the response was YES. Maximal size of possible extension queue 106. Compared 5780 event pairs, 52 based on Foata normal form. 14/1071 useless extension candidates. Maximal degree in co-relation 7105. Up to 277 conditions per place. [2023-08-27 15:37:36,990 INFO L140 encePairwiseOnDemand]: 484/490 looper letters, 170 selfloop transitions, 149 changer transitions 0/319 dead transitions. [2023-08-27 15:37:36,991 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 223 places, 319 transitions, 4700 flow [2023-08-27 15:37:36,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-08-27 15:37:36,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2023-08-27 15:37:36,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 2960 transitions. [2023-08-27 15:37:36,994 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37755102040816324 [2023-08-27 15:37:36,994 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 2960 transitions. [2023-08-27 15:37:36,994 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 2960 transitions. [2023-08-27 15:37:36,995 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 15:37:36,995 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 2960 transitions. [2023-08-27 15:37:36,997 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 185.0) internal successors, (2960), 16 states have internal predecessors, (2960), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 15:37:37,002 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 490.0) internal successors, (8330), 17 states have internal predecessors, (8330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 15:37:37,002 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 490.0) internal successors, (8330), 17 states have internal predecessors, (8330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 15:37:37,002 INFO L175 Difference]: Start difference. First operand has 209 places, 273 transitions, 3975 flow. Second operand 16 states and 2960 transitions. [2023-08-27 15:37:37,003 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 223 places, 319 transitions, 4700 flow [2023-08-27 15:37:37,061 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 217 places, 319 transitions, 4516 flow, removed 42 selfloop flow, removed 6 redundant places. [2023-08-27 15:37:37,067 INFO L231 Difference]: Finished difference. Result has 219 places, 271 transitions, 4066 flow [2023-08-27 15:37:37,067 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=490, PETRI_DIFFERENCE_MINUEND_FLOW=3659, PETRI_DIFFERENCE_MINUEND_PLACES=202, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=267, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=145, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=118, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=4066, PETRI_PLACES=219, PETRI_TRANSITIONS=271} [2023-08-27 15:37:37,068 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 196 predicate places. [2023-08-27 15:37:37,068 INFO L495 AbstractCegarLoop]: Abstraction has has 219 places, 271 transitions, 4066 flow [2023-08-27 15:37:37,068 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 180.0909090909091) internal successors, (1981), 11 states have internal predecessors, (1981), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 15:37:37,068 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 15:37:37,068 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 15:37:37,074 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-08-27 15:37:37,274 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,SelfDestructingSolverStorable21 [2023-08-27 15:37:37,274 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT (and 2 more)] === [2023-08-27 15:37:37,275 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 15:37:37,275 INFO L85 PathProgramCache]: Analyzing trace with hash 340172495, now seen corresponding path program 5 times [2023-08-27 15:37:37,275 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 15:37:37,275 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1174986737] [2023-08-27 15:37:37,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 15:37:37,275 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 15:37:37,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 15:37:37,606 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-27 15:37:37,606 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 15:37:37,606 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1174986737] [2023-08-27 15:37:37,606 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1174986737] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 15:37:37,607 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [521837236] [2023-08-27 15:37:37,607 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-27 15:37:37,607 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 15:37:37,607 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 15:37:37,609 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 15:37:37,625 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 15:37:37,833 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-27 15:37:37,833 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 15:37:37,834 INFO L262 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 9 conjunts are in the unsatisfiable core [2023-08-27 15:37:37,837 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 15:37:37,978 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 15:37:37,978 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 275 treesize of output 260 [2023-08-27 15:37:38,422 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-27 15:37:38,423 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 15:37:38,537 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 112 treesize of output 104 [2023-08-27 15:37:38,708 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 122 treesize of output 114 [2023-08-27 15:37:38,945 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-27 15:37:38,945 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [521837236] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 15:37:38,945 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 15:37:38,945 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 11 [2023-08-27 15:37:38,945 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1894219366] [2023-08-27 15:37:38,945 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 15:37:38,946 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-08-27 15:37:38,946 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 15:37:38,946 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-08-27 15:37:38,946 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2023-08-27 15:37:38,947 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 178 out of 490 [2023-08-27 15:37:38,949 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 219 places, 271 transitions, 4066 flow. Second operand has 11 states, 11 states have (on average 180.0909090909091) internal successors, (1981), 11 states have internal predecessors, (1981), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 15:37:38,949 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 15:37:38,949 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 178 of 490 [2023-08-27 15:37:38,949 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 15:37:39,945 INFO L124 PetriNetUnfolderBase]: 749/1382 cut-off events. [2023-08-27 15:37:39,945 INFO L125 PetriNetUnfolderBase]: For 10626/10626 co-relation queries the response was YES. [2023-08-27 15:37:39,950 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9760 conditions, 1382 events. 749/1382 cut-off events. For 10626/10626 co-relation queries the response was YES. Maximal size of possible extension queue 129. Compared 7665 event pairs, 89 based on Foata normal form. 14/1395 useless extension candidates. Maximal degree in co-relation 9701. Up to 652 conditions per place. [2023-08-27 15:37:39,955 INFO L140 encePairwiseOnDemand]: 484/490 looper letters, 218 selfloop transitions, 175 changer transitions 0/393 dead transitions. [2023-08-27 15:37:39,955 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 231 places, 393 transitions, 6365 flow [2023-08-27 15:37:39,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-08-27 15:37:39,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-08-27 15:37:39,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 2408 transitions. [2023-08-27 15:37:39,964 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.378021978021978 [2023-08-27 15:37:39,964 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 2408 transitions. [2023-08-27 15:37:39,964 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 2408 transitions. [2023-08-27 15:37:39,965 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 15:37:39,965 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 2408 transitions. [2023-08-27 15:37:39,967 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 185.23076923076923) internal successors, (2408), 13 states have internal predecessors, (2408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 15:37:39,970 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 490.0) internal successors, (6860), 14 states have internal predecessors, (6860), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 15:37:39,971 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 490.0) internal successors, (6860), 14 states have internal predecessors, (6860), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 15:37:39,971 INFO L175 Difference]: Start difference. First operand has 219 places, 271 transitions, 4066 flow. Second operand 13 states and 2408 transitions. [2023-08-27 15:37:39,971 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 231 places, 393 transitions, 6365 flow [2023-08-27 15:37:40,045 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 222 places, 393 transitions, 6061 flow, removed 27 selfloop flow, removed 9 redundant places. [2023-08-27 15:37:40,050 INFO L231 Difference]: Finished difference. Result has 228 places, 335 transitions, 5438 flow [2023-08-27 15:37:40,050 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=490, PETRI_DIFFERENCE_MINUEND_FLOW=3798, PETRI_DIFFERENCE_MINUEND_PLACES=210, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=270, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=125, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=129, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=5438, PETRI_PLACES=228, PETRI_TRANSITIONS=335} [2023-08-27 15:37:40,050 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 205 predicate places. [2023-08-27 15:37:40,051 INFO L495 AbstractCegarLoop]: Abstraction has has 228 places, 335 transitions, 5438 flow [2023-08-27 15:37:40,051 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 180.0909090909091) internal successors, (1981), 11 states have internal predecessors, (1981), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 15:37:40,051 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 15:37:40,051 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 15:37:40,056 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 15:37:40,251 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 15:37:40,252 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT (and 2 more)] === [2023-08-27 15:37:40,252 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 15:37:40,252 INFO L85 PathProgramCache]: Analyzing trace with hash 1487711031, now seen corresponding path program 6 times [2023-08-27 15:37:40,252 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 15:37:40,252 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [113241614] [2023-08-27 15:37:40,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 15:37:40,252 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 15:37:40,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 15:37:40,436 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-27 15:37:40,436 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 15:37:40,436 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [113241614] [2023-08-27 15:37:40,436 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [113241614] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 15:37:40,436 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [33264349] [2023-08-27 15:37:40,436 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-27 15:37:40,437 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 15:37:40,437 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 15:37:40,438 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-27 15:37:40,464 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-08-27 15:37:40,618 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2023-08-27 15:37:40,619 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 15:37:40,620 INFO L262 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 9 conjunts are in the unsatisfiable core [2023-08-27 15:37:40,622 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 15:37:40,790 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-27 15:37:40,791 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 15:37:40,929 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 112 treesize of output 104 [2023-08-27 15:37:41,070 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 114 treesize of output 106 [2023-08-27 15:37:41,295 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-27 15:37:41,295 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [33264349] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 15:37:41,295 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 15:37:41,295 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2023-08-27 15:37:41,295 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [868145051] [2023-08-27 15:37:41,296 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 15:37:41,296 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-08-27 15:37:41,296 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 15:37:41,296 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-08-27 15:37:41,296 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2023-08-27 15:37:41,298 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 178 out of 490 [2023-08-27 15:37:41,300 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 228 places, 335 transitions, 5438 flow. Second operand has 12 states, 12 states have (on average 180.33333333333334) internal successors, (2164), 12 states have internal predecessors, (2164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 15:37:41,300 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 15:37:41,300 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 178 of 490 [2023-08-27 15:37:41,300 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 15:37:42,581 INFO L124 PetriNetUnfolderBase]: 736/1369 cut-off events. [2023-08-27 15:37:42,581 INFO L125 PetriNetUnfolderBase]: For 12652/12652 co-relation queries the response was YES. [2023-08-27 15:37:42,587 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10084 conditions, 1369 events. 736/1369 cut-off events. For 12652/12652 co-relation queries the response was YES. Maximal size of possible extension queue 131. Compared 7650 event pairs, 89 based on Foata normal form. 36/1404 useless extension candidates. Maximal degree in co-relation 10020. Up to 652 conditions per place. [2023-08-27 15:37:42,593 INFO L140 encePairwiseOnDemand]: 484/490 looper letters, 214 selfloop transitions, 180 changer transitions 0/394 dead transitions. [2023-08-27 15:37:42,593 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 244 places, 394 transitions, 6588 flow [2023-08-27 15:37:42,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-08-27 15:37:42,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2023-08-27 15:37:42,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 3129 transitions. [2023-08-27 15:37:42,597 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37563025210084033 [2023-08-27 15:37:42,597 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 3129 transitions. [2023-08-27 15:37:42,597 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 3129 transitions. [2023-08-27 15:37:42,598 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 15:37:42,598 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 3129 transitions. [2023-08-27 15:37:42,600 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 184.05882352941177) internal successors, (3129), 17 states have internal predecessors, (3129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 15:37:42,605 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 490.0) internal successors, (8820), 18 states have internal predecessors, (8820), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 15:37:42,605 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 490.0) internal successors, (8820), 18 states have internal predecessors, (8820), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 15:37:42,606 INFO L175 Difference]: Start difference. First operand has 228 places, 335 transitions, 5438 flow. Second operand 17 states and 3129 transitions. [2023-08-27 15:37:42,606 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 244 places, 394 transitions, 6588 flow [2023-08-27 15:37:42,721 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 239 places, 394 transitions, 6240 flow, removed 132 selfloop flow, removed 5 redundant places. [2023-08-27 15:37:42,728 INFO L231 Difference]: Finished difference. Result has 241 places, 341 transitions, 5596 flow [2023-08-27 15:37:42,728 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=490, PETRI_DIFFERENCE_MINUEND_FLOW=4975, PETRI_DIFFERENCE_MINUEND_PLACES=223, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=329, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=171, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=155, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=5596, PETRI_PLACES=241, PETRI_TRANSITIONS=341} [2023-08-27 15:37:42,728 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 218 predicate places. [2023-08-27 15:37:42,729 INFO L495 AbstractCegarLoop]: Abstraction has has 241 places, 341 transitions, 5596 flow [2023-08-27 15:37:42,729 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 180.33333333333334) internal successors, (2164), 12 states have internal predecessors, (2164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 15:37:42,729 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 15:37:42,729 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 15:37:42,737 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2023-08-27 15:37:42,937 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 15:37:42,938 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT (and 2 more)] === [2023-08-27 15:37:42,938 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 15:37:42,938 INFO L85 PathProgramCache]: Analyzing trace with hash -281026869, now seen corresponding path program 7 times [2023-08-27 15:37:42,938 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 15:37:42,938 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1878475890] [2023-08-27 15:37:42,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 15:37:42,938 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 15:37:42,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 15:37:43,217 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-27 15:37:43,218 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 15:37:43,218 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1878475890] [2023-08-27 15:37:43,218 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1878475890] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 15:37:43,218 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1265912877] [2023-08-27 15:37:43,218 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-27 15:37:43,218 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 15:37:43,218 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 15:37:43,221 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-27 15:37:43,246 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-08-27 15:37:43,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 15:37:43,405 INFO L262 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 9 conjunts are in the unsatisfiable core [2023-08-27 15:37:43,406 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 15:37:43,536 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 15:37:43,536 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 275 treesize of output 260 [2023-08-27 15:37:44,091 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-27 15:37:44,091 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 15:37:44,224 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 114 treesize of output 106 [2023-08-27 15:37:44,334 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 112 treesize of output 104 [2023-08-27 15:37:44,505 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-27 15:37:44,505 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1265912877] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 15:37:44,505 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 15:37:44,505 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 11 [2023-08-27 15:37:44,505 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [338810896] [2023-08-27 15:37:44,505 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 15:37:44,505 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-08-27 15:37:44,506 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 15:37:44,506 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-08-27 15:37:44,506 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2023-08-27 15:37:44,507 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 178 out of 490 [2023-08-27 15:37:44,508 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 241 places, 341 transitions, 5596 flow. Second operand has 11 states, 11 states have (on average 180.1818181818182) internal successors, (1982), 11 states have internal predecessors, (1982), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 15:37:44,508 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 15:37:44,508 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 178 of 490 [2023-08-27 15:37:44,508 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 15:37:45,256 INFO L124 PetriNetUnfolderBase]: 911/1692 cut-off events. [2023-08-27 15:37:45,256 INFO L125 PetriNetUnfolderBase]: For 14775/14775 co-relation queries the response was YES. [2023-08-27 15:37:45,262 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12515 conditions, 1692 events. 911/1692 cut-off events. For 14775/14775 co-relation queries the response was YES. Maximal size of possible extension queue 153. Compared 9859 event pairs, 31 based on Foata normal form. 8/1699 useless extension candidates. Maximal degree in co-relation 12450. Up to 441 conditions per place. [2023-08-27 15:37:45,269 INFO L140 encePairwiseOnDemand]: 484/490 looper letters, 237 selfloop transitions, 235 changer transitions 0/472 dead transitions. [2023-08-27 15:37:45,270 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 255 places, 472 transitions, 8217 flow [2023-08-27 15:37:45,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-08-27 15:37:45,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2023-08-27 15:37:45,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 2775 transitions. [2023-08-27 15:37:45,275 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37755102040816324 [2023-08-27 15:37:45,275 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 2775 transitions. [2023-08-27 15:37:45,275 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 2775 transitions. [2023-08-27 15:37:45,276 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 15:37:45,276 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 2775 transitions. [2023-08-27 15:37:45,278 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 185.0) internal successors, (2775), 15 states have internal predecessors, (2775), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 15:37:45,282 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 490.0) internal successors, (7840), 16 states have internal predecessors, (7840), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 15:37:45,283 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 490.0) internal successors, (7840), 16 states have internal predecessors, (7840), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 15:37:45,283 INFO L175 Difference]: Start difference. First operand has 241 places, 341 transitions, 5596 flow. Second operand 15 states and 2775 transitions. [2023-08-27 15:37:45,283 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 255 places, 472 transitions, 8217 flow [2023-08-27 15:37:45,409 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 246 places, 472 transitions, 7916 flow, removed 39 selfloop flow, removed 9 redundant places. [2023-08-27 15:37:45,417 INFO L231 Difference]: Finished difference. Result has 251 places, 398 transitions, 6940 flow [2023-08-27 15:37:45,417 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=490, PETRI_DIFFERENCE_MINUEND_FLOW=5312, PETRI_DIFFERENCE_MINUEND_PLACES=232, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=341, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=189, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=134, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=6940, PETRI_PLACES=251, PETRI_TRANSITIONS=398} [2023-08-27 15:37:45,418 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 228 predicate places. [2023-08-27 15:37:45,418 INFO L495 AbstractCegarLoop]: Abstraction has has 251 places, 398 transitions, 6940 flow [2023-08-27 15:37:45,418 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 180.1818181818182) internal successors, (1982), 11 states have internal predecessors, (1982), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 15:37:45,418 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 15:37:45,418 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 15:37:45,427 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2023-08-27 15:37:45,624 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2023-08-27 15:37:45,624 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT (and 2 more)] === [2023-08-27 15:37:45,624 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 15:37:45,624 INFO L85 PathProgramCache]: Analyzing trace with hash -805449651, now seen corresponding path program 8 times [2023-08-27 15:37:45,625 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 15:37:45,625 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1601479166] [2023-08-27 15:37:45,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 15:37:45,625 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 15:37:45,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 15:37:45,917 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-27 15:37:45,917 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 15:37:45,917 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1601479166] [2023-08-27 15:37:45,917 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1601479166] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 15:37:45,918 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [650463821] [2023-08-27 15:37:45,918 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-27 15:37:45,918 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 15:37:45,918 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 15:37:45,919 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-27 15:37:45,921 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-08-27 15:37:46,145 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-27 15:37:46,145 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 15:37:46,147 INFO L262 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 9 conjunts are in the unsatisfiable core [2023-08-27 15:37:46,149 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 15:37:46,394 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-27 15:37:46,394 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 15:37:46,518 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 114 treesize of output 106 [2023-08-27 15:37:46,683 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 120 treesize of output 112 [2023-08-27 15:37:46,822 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-27 15:37:46,822 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [650463821] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 15:37:46,822 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 15:37:46,822 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2023-08-27 15:37:46,822 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2119698318] [2023-08-27 15:37:46,823 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 15:37:46,823 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-08-27 15:37:46,823 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 15:37:46,823 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-08-27 15:37:46,823 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2023-08-27 15:37:46,824 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 178 out of 490 [2023-08-27 15:37:46,825 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 251 places, 398 transitions, 6940 flow. Second operand has 12 states, 12 states have (on average 180.33333333333334) internal successors, (2164), 12 states have internal predecessors, (2164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 15:37:46,825 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 15:37:46,825 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 178 of 490 [2023-08-27 15:37:46,825 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 15:37:47,851 INFO L124 PetriNetUnfolderBase]: 972/1813 cut-off events. [2023-08-27 15:37:47,852 INFO L125 PetriNetUnfolderBase]: For 19750/19750 co-relation queries the response was YES. [2023-08-27 15:37:47,859 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14087 conditions, 1813 events. 972/1813 cut-off events. For 19750/19750 co-relation queries the response was YES. Maximal size of possible extension queue 156. Compared 10613 event pairs, 42 based on Foata normal form. 24/1836 useless extension candidates. Maximal degree in co-relation 14016. Up to 478 conditions per place. [2023-08-27 15:37:47,864 INFO L140 encePairwiseOnDemand]: 483/490 looper letters, 245 selfloop transitions, 264 changer transitions 0/509 dead transitions. [2023-08-27 15:37:47,864 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 268 places, 509 transitions, 9226 flow [2023-08-27 15:37:47,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-08-27 15:37:47,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2023-08-27 15:37:47,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 3321 transitions. [2023-08-27 15:37:47,869 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.376530612244898 [2023-08-27 15:37:47,869 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 3321 transitions. [2023-08-27 15:37:47,869 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 3321 transitions. [2023-08-27 15:37:47,870 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 15:37:47,870 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 3321 transitions. [2023-08-27 15:37:47,872 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 184.5) internal successors, (3321), 18 states have internal predecessors, (3321), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 15:37:47,877 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 490.0) internal successors, (9310), 19 states have internal predecessors, (9310), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 15:37:47,878 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 490.0) internal successors, (9310), 19 states have internal predecessors, (9310), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 15:37:47,878 INFO L175 Difference]: Start difference. First operand has 251 places, 398 transitions, 6940 flow. Second operand 18 states and 3321 transitions. [2023-08-27 15:37:47,878 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 268 places, 509 transitions, 9226 flow [2023-08-27 15:37:48,024 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 263 places, 509 transitions, 8920 flow, removed 96 selfloop flow, removed 5 redundant places. [2023-08-27 15:37:48,032 INFO L231 Difference]: Finished difference. Result has 270 places, 429 transitions, 7990 flow [2023-08-27 15:37:48,033 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=490, PETRI_DIFFERENCE_MINUEND_FLOW=6548, PETRI_DIFFERENCE_MINUEND_PLACES=246, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=393, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=231, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=144, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=7990, PETRI_PLACES=270, PETRI_TRANSITIONS=429} [2023-08-27 15:37:48,033 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 247 predicate places. [2023-08-27 15:37:48,033 INFO L495 AbstractCegarLoop]: Abstraction has has 270 places, 429 transitions, 7990 flow [2023-08-27 15:37:48,033 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 180.33333333333334) internal successors, (2164), 12 states have internal predecessors, (2164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 15:37:48,034 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 15:37:48,034 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 15:37:48,041 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2023-08-27 15:37:48,237 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2023-08-27 15:37:48,237 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT (and 2 more)] === [2023-08-27 15:37:48,237 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 15:37:48,237 INFO L85 PathProgramCache]: Analyzing trace with hash -1952988187, now seen corresponding path program 9 times [2023-08-27 15:37:48,237 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 15:37:48,237 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1118370747] [2023-08-27 15:37:48,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 15:37:48,237 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 15:37:48,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 15:37:48,441 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-27 15:37:48,441 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 15:37:48,441 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1118370747] [2023-08-27 15:37:48,441 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1118370747] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 15:37:48,441 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [436822384] [2023-08-27 15:37:48,441 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-27 15:37:48,441 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 15:37:48,442 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 15:37:48,443 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-27 15:37:48,445 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2023-08-27 15:37:48,645 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-08-27 15:37:48,645 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 15:37:48,646 INFO L262 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 9 conjunts are in the unsatisfiable core [2023-08-27 15:37:48,649 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 15:37:48,811 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 100 treesize of output 92 [2023-08-27 15:37:48,849 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 92 treesize of output 84 [2023-08-27 15:37:48,973 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-27 15:37:48,973 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 15:37:49,142 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 114 treesize of output 106 [2023-08-27 15:37:49,273 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 120 treesize of output 112 [2023-08-27 15:37:49,479 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-27 15:37:49,480 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [436822384] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 15:37:49,480 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 15:37:49,480 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 13 [2023-08-27 15:37:49,480 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [242307480] [2023-08-27 15:37:49,480 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 15:37:49,480 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-08-27 15:37:49,480 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 15:37:49,480 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-08-27 15:37:49,480 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2023-08-27 15:37:49,481 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 178 out of 490 [2023-08-27 15:37:49,482 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 270 places, 429 transitions, 7990 flow. Second operand has 13 states, 13 states have (on average 179.92307692307693) internal successors, (2339), 13 states have internal predecessors, (2339), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 15:37:49,482 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 15:37:49,482 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 178 of 490 [2023-08-27 15:37:49,482 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 15:37:50,640 INFO L124 PetriNetUnfolderBase]: 967/1790 cut-off events. [2023-08-27 15:37:50,640 INFO L125 PetriNetUnfolderBase]: For 22183/22183 co-relation queries the response was YES. [2023-08-27 15:37:50,648 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14746 conditions, 1790 events. 967/1790 cut-off events. For 22183/22183 co-relation queries the response was YES. Maximal size of possible extension queue 154. Compared 10359 event pairs, 42 based on Foata normal form. 8/1797 useless extension candidates. Maximal degree in co-relation 14670. Up to 478 conditions per place. [2023-08-27 15:37:50,653 INFO L140 encePairwiseOnDemand]: 483/490 looper letters, 240 selfloop transitions, 254 changer transitions 0/494 dead transitions. [2023-08-27 15:37:50,653 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 283 places, 494 transitions, 9552 flow [2023-08-27 15:37:50,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-08-27 15:37:50,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2023-08-27 15:37:50,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 2772 transitions. [2023-08-27 15:37:50,656 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37714285714285717 [2023-08-27 15:37:50,656 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 2772 transitions. [2023-08-27 15:37:50,656 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 2772 transitions. [2023-08-27 15:37:50,656 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 15:37:50,656 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 2772 transitions. [2023-08-27 15:37:50,658 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 184.8) internal successors, (2772), 15 states have internal predecessors, (2772), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 15:37:50,661 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 490.0) internal successors, (7840), 16 states have internal predecessors, (7840), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 15:37:50,661 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 490.0) internal successors, (7840), 16 states have internal predecessors, (7840), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 15:37:50,661 INFO L175 Difference]: Start difference. First operand has 270 places, 429 transitions, 7990 flow. Second operand 15 states and 2772 transitions. [2023-08-27 15:37:50,661 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 283 places, 494 transitions, 9552 flow [2023-08-27 15:37:50,823 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 274 places, 494 transitions, 9272 flow, removed 66 selfloop flow, removed 9 redundant places. [2023-08-27 15:37:50,830 INFO L231 Difference]: Finished difference. Result has 275 places, 426 transitions, 8124 flow [2023-08-27 15:37:50,830 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=490, PETRI_DIFFERENCE_MINUEND_FLOW=7589, PETRI_DIFFERENCE_MINUEND_PLACES=260, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=425, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=253, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=171, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=8124, PETRI_PLACES=275, PETRI_TRANSITIONS=426} [2023-08-27 15:37:50,830 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 252 predicate places. [2023-08-27 15:37:50,830 INFO L495 AbstractCegarLoop]: Abstraction has has 275 places, 426 transitions, 8124 flow [2023-08-27 15:37:50,831 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 179.92307692307693) internal successors, (2339), 13 states have internal predecessors, (2339), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 15:37:50,831 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 15:37:50,831 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 15:37:50,836 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2023-08-27 15:37:51,031 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2023-08-27 15:37:51,032 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT (and 2 more)] === [2023-08-27 15:37:51,032 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 15:37:51,032 INFO L85 PathProgramCache]: Analyzing trace with hash 1085659664, now seen corresponding path program 8 times [2023-08-27 15:37:51,032 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 15:37:51,032 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [830555381] [2023-08-27 15:37:51,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 15:37:51,033 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 15:37:51,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 15:37:51,607 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 15:37:51,607 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 15:37:51,607 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [830555381] [2023-08-27 15:37:51,607 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [830555381] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 15:37:51,607 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [300193628] [2023-08-27 15:37:51,607 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-27 15:37:51,608 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 15:37:51,608 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 15:37:51,609 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-27 15:37:51,639 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2023-08-27 15:37:51,756 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-27 15:37:51,756 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 15:37:51,758 INFO L262 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 44 conjunts are in the unsatisfiable core [2023-08-27 15:37:51,761 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 15:37:52,392 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-27 15:37:52,412 INFO L322 Elim1Store]: treesize reduction 69, result has 15.9 percent of original size [2023-08-27 15:37:52,412 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 49 treesize of output 40 [2023-08-27 15:37:52,442 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 15:37:52,442 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 15:37:56,056 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 15:37:56,057 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 422 treesize of output 382 [2023-08-27 15:38:01,594 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 15:38:01,594 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [300193628] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 15:38:01,595 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 15:38:01,595 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 9, 9] total 21 [2023-08-27 15:38:01,595 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [742971258] [2023-08-27 15:38:01,595 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 15:38:01,595 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-08-27 15:38:01,595 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 15:38:01,596 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-08-27 15:38:01,596 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=137, Invalid=369, Unknown=0, NotChecked=0, Total=506 [2023-08-27 15:38:01,597 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 125 out of 490 [2023-08-27 15:38:01,598 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 275 places, 426 transitions, 8124 flow. Second operand has 23 states, 23 states have (on average 127.0) internal successors, (2921), 23 states have internal predecessors, (2921), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 15:38:01,598 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 15:38:01,598 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 125 of 490 [2023-08-27 15:38:01,598 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 15:38:03,737 INFO L124 PetriNetUnfolderBase]: 1058/2008 cut-off events. [2023-08-27 15:38:03,737 INFO L125 PetriNetUnfolderBase]: For 25261/25261 co-relation queries the response was YES. [2023-08-27 15:38:03,749 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16647 conditions, 2008 events. 1058/2008 cut-off events. For 25261/25261 co-relation queries the response was YES. Maximal size of possible extension queue 166. Compared 12290 event pairs, 68 based on Foata normal form. 3/2010 useless extension candidates. Maximal degree in co-relation 16574. Up to 1049 conditions per place. [2023-08-27 15:38:03,756 INFO L140 encePairwiseOnDemand]: 479/490 looper letters, 274 selfloop transitions, 197 changer transitions 43/514 dead transitions. [2023-08-27 15:38:03,756 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 299 places, 514 transitions, 9929 flow [2023-08-27 15:38:03,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2023-08-27 15:38:03,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2023-08-27 15:38:03,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 3251 transitions. [2023-08-27 15:38:03,759 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2653877551020408 [2023-08-27 15:38:03,759 INFO L72 ComplementDD]: Start complementDD. Operand 25 states and 3251 transitions. [2023-08-27 15:38:03,759 INFO L73 IsDeterministic]: Start isDeterministic. Operand 25 states and 3251 transitions. [2023-08-27 15:38:03,760 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 15:38:03,760 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 25 states and 3251 transitions. [2023-08-27 15:38:03,762 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 26 states, 25 states have (on average 130.04) internal successors, (3251), 25 states have internal predecessors, (3251), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 15:38:03,767 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 26 states, 26 states have (on average 490.0) internal successors, (12740), 26 states have internal predecessors, (12740), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 15:38:03,767 INFO L81 ComplementDD]: Finished complementDD. Result has 26 states, 26 states have (on average 490.0) internal successors, (12740), 26 states have internal predecessors, (12740), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 15:38:03,767 INFO L175 Difference]: Start difference. First operand has 275 places, 426 transitions, 8124 flow. Second operand 25 states and 3251 transitions. [2023-08-27 15:38:03,767 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 299 places, 514 transitions, 9929 flow [2023-08-27 15:38:03,928 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 290 places, 514 transitions, 9533 flow, removed 18 selfloop flow, removed 9 redundant places. [2023-08-27 15:38:03,936 INFO L231 Difference]: Finished difference. Result has 294 places, 441 transitions, 8684 flow [2023-08-27 15:38:03,936 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=490, PETRI_DIFFERENCE_MINUEND_FLOW=7761, PETRI_DIFFERENCE_MINUEND_PLACES=266, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=426, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=168, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=231, PETRI_DIFFERENCE_SUBTRAHEND_STATES=25, PETRI_FLOW=8684, PETRI_PLACES=294, PETRI_TRANSITIONS=441} [2023-08-27 15:38:03,937 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 271 predicate places. [2023-08-27 15:38:03,937 INFO L495 AbstractCegarLoop]: Abstraction has has 294 places, 441 transitions, 8684 flow [2023-08-27 15:38:03,937 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 127.0) internal successors, (2921), 23 states have internal predecessors, (2921), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 15:38:03,937 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 15:38:03,937 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 15:38:03,945 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2023-08-27 15:38:04,143 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 15:38:04,143 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT (and 2 more)] === [2023-08-27 15:38:04,143 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 15:38:04,143 INFO L85 PathProgramCache]: Analyzing trace with hash 98743201, now seen corresponding path program 9 times [2023-08-27 15:38:04,143 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 15:38:04,143 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1624018814] [2023-08-27 15:38:04,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 15:38:04,144 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 15:38:04,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 15:38:04,576 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-27 15:38:04,576 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 15:38:04,576 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1624018814] [2023-08-27 15:38:04,576 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1624018814] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 15:38:04,577 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [138428604] [2023-08-27 15:38:04,577 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-27 15:38:04,577 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 15:38:04,577 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 15:38:04,578 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-27 15:38:04,585 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2023-08-27 15:38:04,747 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-08-27 15:38:04,748 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 15:38:04,749 INFO L262 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 40 conjunts are in the unsatisfiable core [2023-08-27 15:38:04,752 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 15:38:04,942 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-27 15:38:04,943 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 15:38:05,302 INFO L322 Elim1Store]: treesize reduction 52, result has 1.9 percent of original size [2023-08-27 15:38:05,302 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 5 new quantified variables, introduced 6 case distinctions, treesize of input 329 treesize of output 304 [2023-08-27 15:38:05,411 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-27 15:38:05,411 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 15:38:16,118 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 15:38:16,118 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 162 treesize of output 210 [2023-08-27 15:38:16,142 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 15:38:16,142 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 58 treesize of output 70 [2023-08-27 15:38:16,407 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-27 15:38:16,408 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [138428604] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 15:38:16,408 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 15:38:16,408 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 10, 8] total 23 [2023-08-27 15:38:16,408 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1172430704] [2023-08-27 15:38:16,408 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 15:38:16,408 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-08-27 15:38:16,409 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 15:38:16,409 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-08-27 15:38:16,409 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=409, Unknown=1, NotChecked=0, Total=506 [2023-08-27 15:38:16,411 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 129 out of 490 [2023-08-27 15:38:16,412 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 294 places, 441 transitions, 8684 flow. Second operand has 23 states, 23 states have (on average 131.0) internal successors, (3013), 23 states have internal predecessors, (3013), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 15:38:16,412 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 15:38:16,412 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 129 of 490 [2023-08-27 15:38:16,412 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 15:38:20,635 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-27 15:38:22,514 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.64s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-27 15:38:26,232 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-27 15:38:29,775 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.48s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-27 15:38:32,320 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-27 15:38:34,338 WARN L539 Checker$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 15:38:42,778 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-27 15:38:46,347 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-27 15:38:47,215 INFO L124 PetriNetUnfolderBase]: 1743/3287 cut-off events. [2023-08-27 15:38:47,215 INFO L125 PetriNetUnfolderBase]: For 47247/47247 co-relation queries the response was YES. [2023-08-27 15:38:47,230 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27173 conditions, 3287 events. 1743/3287 cut-off events. For 47247/47247 co-relation queries the response was YES. Maximal size of possible extension queue 223. Compared 22026 event pairs, 69 based on Foata normal form. 13/3299 useless extension candidates. Maximal degree in co-relation 27095. Up to 851 conditions per place. [2023-08-27 15:38:47,242 INFO L140 encePairwiseOnDemand]: 480/490 looper letters, 363 selfloop transitions, 429 changer transitions 21/813 dead transitions. [2023-08-27 15:38:47,242 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 312 places, 813 transitions, 15192 flow [2023-08-27 15:38:47,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2023-08-27 15:38:47,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2023-08-27 15:38:47,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 5579 transitions. [2023-08-27 15:38:47,248 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.27770034843205577 [2023-08-27 15:38:47,248 INFO L72 ComplementDD]: Start complementDD. Operand 41 states and 5579 transitions. [2023-08-27 15:38:47,248 INFO L73 IsDeterministic]: Start isDeterministic. Operand 41 states and 5579 transitions. [2023-08-27 15:38:47,249 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 15:38:47,249 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 41 states and 5579 transitions. [2023-08-27 15:38:47,254 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 42 states, 41 states have (on average 136.0731707317073) internal successors, (5579), 41 states have internal predecessors, (5579), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 15:38:47,266 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 42 states, 42 states have (on average 490.0) internal successors, (20580), 42 states have internal predecessors, (20580), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 15:38:47,268 INFO L81 ComplementDD]: Finished complementDD. Result has 42 states, 42 states have (on average 490.0) internal successors, (20580), 42 states have internal predecessors, (20580), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 15:38:47,269 INFO L175 Difference]: Start difference. First operand has 294 places, 441 transitions, 8684 flow. Second operand 41 states and 5579 transitions. [2023-08-27 15:38:47,269 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 312 places, 813 transitions, 15192 flow [2023-08-27 15:38:47,557 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 299 places, 813 transitions, 14874 flow, removed 117 selfloop flow, removed 13 redundant places. [2023-08-27 15:38:47,568 INFO L231 Difference]: Finished difference. Result has 317 places, 600 transitions, 12687 flow [2023-08-27 15:38:47,568 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=490, PETRI_DIFFERENCE_MINUEND_FLOW=8476, PETRI_DIFFERENCE_MINUEND_PLACES=259, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=441, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=291, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=129, PETRI_DIFFERENCE_SUBTRAHEND_STATES=41, PETRI_FLOW=12687, PETRI_PLACES=317, PETRI_TRANSITIONS=600} [2023-08-27 15:38:47,569 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 294 predicate places. [2023-08-27 15:38:47,569 INFO L495 AbstractCegarLoop]: Abstraction has has 317 places, 600 transitions, 12687 flow [2023-08-27 15:38:47,569 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 131.0) internal successors, (3013), 23 states have internal predecessors, (3013), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 15:38:47,569 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 15:38:47,569 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 15:38:47,575 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2023-08-27 15:38:47,773 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2023-08-27 15:38:47,773 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT (and 2 more)] === [2023-08-27 15:38:47,773 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 15:38:47,773 INFO L85 PathProgramCache]: Analyzing trace with hash 1870183115, now seen corresponding path program 10 times [2023-08-27 15:38:47,773 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 15:38:47,773 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1540997160] [2023-08-27 15:38:47,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 15:38:47,773 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 15:38:47,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 15:38:48,110 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-27 15:38:48,111 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 15:38:48,111 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1540997160] [2023-08-27 15:38:48,111 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1540997160] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 15:38:48,111 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1182225444] [2023-08-27 15:38:48,111 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-27 15:38:48,111 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 15:38:48,111 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 15:38:48,113 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-27 15:38:48,131 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2023-08-27 15:38:48,315 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-27 15:38:48,316 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 15:38:48,317 INFO L262 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 36 conjunts are in the unsatisfiable core [2023-08-27 15:38:48,319 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 15:38:48,666 INFO L322 Elim1Store]: treesize reduction 25, result has 52.8 percent of original size [2023-08-27 15:38:48,667 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 5 new quantified variables, introduced 6 case distinctions, treesize of input 333 treesize of output 335 [2023-08-27 15:38:48,850 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-27 15:38:48,850 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 15:38:55,677 INFO L322 Elim1Store]: treesize reduction 10, result has 90.5 percent of original size [2023-08-27 15:38:55,678 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 74 treesize of output 128 [2023-08-27 15:38:55,800 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-27 15:38:55,800 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1182225444] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 15:38:55,800 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 15:38:55,800 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9, 7] total 21 [2023-08-27 15:38:55,800 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [646118633] [2023-08-27 15:38:55,801 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 15:38:55,801 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-08-27 15:38:55,801 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 15:38:55,801 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-08-27 15:38:55,801 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=332, Unknown=0, NotChecked=0, Total=420 [2023-08-27 15:38:55,802 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 133 out of 490 [2023-08-27 15:38:55,804 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 317 places, 600 transitions, 12687 flow. Second operand has 21 states, 21 states have (on average 135.0952380952381) internal successors, (2837), 21 states have internal predecessors, (2837), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 15:38:55,804 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 15:38:55,804 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 133 of 490 [2023-08-27 15:38:55,804 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 15:39:00,947 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.73s for a HTC check with result VALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-27 15:39:06,410 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-27 15:39:09,940 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 [] [2023-08-27 15:39:15,732 INFO L124 PetriNetUnfolderBase]: 2206/4141 cut-off events. [2023-08-27 15:39:15,732 INFO L125 PetriNetUnfolderBase]: For 75373/75373 co-relation queries the response was YES. [2023-08-27 15:39:15,755 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37179 conditions, 4141 events. 2206/4141 cut-off events. For 75373/75373 co-relation queries the response was YES. Maximal size of possible extension queue 273. Compared 28596 event pairs, 141 based on Foata normal form. 8/4148 useless extension candidates. Maximal degree in co-relation 37087. Up to 1020 conditions per place. [2023-08-27 15:39:15,770 INFO L140 encePairwiseOnDemand]: 480/490 looper letters, 467 selfloop transitions, 468 changer transitions 20/955 dead transitions. [2023-08-27 15:39:15,770 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 354 places, 955 transitions, 19706 flow [2023-08-27 15:39:15,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2023-08-27 15:39:15,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2023-08-27 15:39:15,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 5743 transitions. [2023-08-27 15:39:15,774 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2858636137381782 [2023-08-27 15:39:15,774 INFO L72 ComplementDD]: Start complementDD. Operand 41 states and 5743 transitions. [2023-08-27 15:39:15,774 INFO L73 IsDeterministic]: Start isDeterministic. Operand 41 states and 5743 transitions. [2023-08-27 15:39:15,775 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 15:39:15,775 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 41 states and 5743 transitions. [2023-08-27 15:39:15,778 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 42 states, 41 states have (on average 140.0731707317073) internal successors, (5743), 41 states have internal predecessors, (5743), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 15:39:15,787 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 42 states, 42 states have (on average 490.0) internal successors, (20580), 42 states have internal predecessors, (20580), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 15:39:15,787 INFO L81 ComplementDD]: Finished complementDD. Result has 42 states, 42 states have (on average 490.0) internal successors, (20580), 42 states have internal predecessors, (20580), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 15:39:15,788 INFO L175 Difference]: Start difference. First operand has 317 places, 600 transitions, 12687 flow. Second operand 41 states and 5743 transitions. [2023-08-27 15:39:15,788 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 354 places, 955 transitions, 19706 flow [2023-08-27 15:39:16,278 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 343 places, 955 transitions, 19136 flow, removed 202 selfloop flow, removed 11 redundant places. [2023-08-27 15:39:16,293 INFO L231 Difference]: Finished difference. Result has 363 places, 764 transitions, 17228 flow [2023-08-27 15:39:16,293 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=490, PETRI_DIFFERENCE_MINUEND_FLOW=12310, PETRI_DIFFERENCE_MINUEND_PLACES=303, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=600, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=316, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=248, PETRI_DIFFERENCE_SUBTRAHEND_STATES=41, PETRI_FLOW=17228, PETRI_PLACES=363, PETRI_TRANSITIONS=764} [2023-08-27 15:39:16,294 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 340 predicate places. [2023-08-27 15:39:16,294 INFO L495 AbstractCegarLoop]: Abstraction has has 363 places, 764 transitions, 17228 flow [2023-08-27 15:39:16,294 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 135.0952380952381) internal successors, (2837), 21 states have internal predecessors, (2837), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 15:39:16,295 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 15:39:16,295 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 15:39:16,300 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2023-08-27 15:39:16,497 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 15:39:16,498 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT (and 2 more)] === [2023-08-27 15:39:16,498 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 15:39:16,498 INFO L85 PathProgramCache]: Analyzing trace with hash -1277245645, now seen corresponding path program 11 times [2023-08-27 15:39:16,498 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 15:39:16,498 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1493230635] [2023-08-27 15:39:16,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 15:39:16,498 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 15:39:16,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 15:39:16,770 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-27 15:39:16,770 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 15:39:16,770 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1493230635] [2023-08-27 15:39:16,770 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1493230635] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 15:39:16,770 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [40816588] [2023-08-27 15:39:16,771 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-27 15:39:16,771 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 15:39:16,771 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 15:39:16,772 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-27 15:39:16,773 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2023-08-27 15:39:16,946 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-27 15:39:16,946 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 15:39:16,947 INFO L262 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 50 conjunts are in the unsatisfiable core [2023-08-27 15:39:16,949 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 15:39:17,401 INFO L322 Elim1Store]: treesize reduction 52, result has 1.9 percent of original size [2023-08-27 15:39:17,401 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 5 new quantified variables, introduced 6 case distinctions, treesize of input 343 treesize of output 310 [2023-08-27 15:39:17,514 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 15:39:17,515 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 15:39:25,544 INFO L322 Elim1Store]: treesize reduction 10, result has 90.5 percent of original size [2023-08-27 15:39:25,544 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 126 treesize of output 140 [2023-08-27 15:39:25,851 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-27 15:39:25,851 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [40816588] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 15:39:25,851 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 15:39:25,851 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 10, 7] total 22 [2023-08-27 15:39:25,851 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1829724742] [2023-08-27 15:39:25,852 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 15:39:25,852 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-08-27 15:39:25,852 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 15:39:25,852 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-08-27 15:39:25,852 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=371, Unknown=0, NotChecked=0, Total=462 [2023-08-27 15:39:25,854 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 125 out of 490 [2023-08-27 15:39:25,855 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 363 places, 764 transitions, 17228 flow. Second operand has 22 states, 22 states have (on average 127.0909090909091) internal successors, (2796), 22 states have internal predecessors, (2796), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 15:39:25,855 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 15:39:25,856 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 125 of 490 [2023-08-27 15:39:25,856 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 15:39:28,701 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-27 15:39:30,568 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.23s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-27 15:39:36,663 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-27 15:39:39,133 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.07s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-27 15:39:52,627 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-27 15:40:04,834 WARN L234 SmtUtils]: Spent 10.32s on a formula simplification. DAG size of input: 132 DAG size of output: 102 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-27 15:40:07,137 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-27 15:40:09,145 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-27 15:40:21,634 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-27 15:40:24,024 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-27 15:40:26,759 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-27 15:40:29,242 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-27 15:40:31,273 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-27 15:40:34,001 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-27 15:40:36,025 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 [] [2023-08-27 15:40:39,090 INFO L124 PetriNetUnfolderBase]: 2781/5185 cut-off events. [2023-08-27 15:40:39,091 INFO L125 PetriNetUnfolderBase]: For 120846/120846 co-relation queries the response was YES. [2023-08-27 15:40:39,124 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50136 conditions, 5185 events. 2781/5185 cut-off events. For 120846/120846 co-relation queries the response was YES. Maximal size of possible extension queue 340. Compared 37330 event pairs, 199 based on Foata normal form. 21/5205 useless extension candidates. Maximal degree in co-relation 50027. Up to 1277 conditions per place. [2023-08-27 15:40:39,145 INFO L140 encePairwiseOnDemand]: 479/490 looper letters, 540 selfloop transitions, 600 changer transitions 31/1171 dead transitions. [2023-08-27 15:40:39,146 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 414 places, 1171 transitions, 25525 flow [2023-08-27 15:40:39,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2023-08-27 15:40:39,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2023-08-27 15:40:39,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 7381 transitions. [2023-08-27 15:40:39,151 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2689868804664723 [2023-08-27 15:40:39,151 INFO L72 ComplementDD]: Start complementDD. Operand 56 states and 7381 transitions. [2023-08-27 15:40:39,151 INFO L73 IsDeterministic]: Start isDeterministic. Operand 56 states and 7381 transitions. [2023-08-27 15:40:39,152 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 15:40:39,152 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 56 states and 7381 transitions. [2023-08-27 15:40:39,156 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 57 states, 56 states have (on average 131.80357142857142) internal successors, (7381), 56 states have internal predecessors, (7381), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 15:40:39,168 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 57 states, 57 states have (on average 490.0) internal successors, (27930), 57 states have internal predecessors, (27930), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 15:40:39,169 INFO L81 ComplementDD]: Finished complementDD. Result has 57 states, 57 states have (on average 490.0) internal successors, (27930), 57 states have internal predecessors, (27930), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 15:40:39,170 INFO L175 Difference]: Start difference. First operand has 363 places, 764 transitions, 17228 flow. Second operand 56 states and 7381 transitions. [2023-08-27 15:40:39,170 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 414 places, 1171 transitions, 25525 flow [2023-08-27 15:40:40,070 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 403 places, 1171 transitions, 24699 flow, removed 352 selfloop flow, removed 11 redundant places. [2023-08-27 15:40:40,087 INFO L231 Difference]: Finished difference. Result has 421 places, 939 transitions, 22563 flow [2023-08-27 15:40:40,087 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=490, PETRI_DIFFERENCE_MINUEND_FLOW=16675, PETRI_DIFFERENCE_MINUEND_PLACES=348, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=761, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=428, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=280, PETRI_DIFFERENCE_SUBTRAHEND_STATES=56, PETRI_FLOW=22563, PETRI_PLACES=421, PETRI_TRANSITIONS=939} [2023-08-27 15:40:40,088 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 398 predicate places. [2023-08-27 15:40:40,088 INFO L495 AbstractCegarLoop]: Abstraction has has 421 places, 939 transitions, 22563 flow [2023-08-27 15:40:40,088 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 127.0909090909091) internal successors, (2796), 22 states have internal predecessors, (2796), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 15:40:40,088 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 15:40:40,088 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 15:40:40,093 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2023-08-27 15:40:40,289 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 15:40:40,289 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT (and 2 more)] === [2023-08-27 15:40:40,289 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 15:40:40,289 INFO L85 PathProgramCache]: Analyzing trace with hash -1968896405, now seen corresponding path program 12 times [2023-08-27 15:40:40,289 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 15:40:40,289 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [696528193] [2023-08-27 15:40:40,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 15:40:40,290 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 15:40:40,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 15:40:40,549 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-27 15:40:40,549 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 15:40:40,549 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [696528193] [2023-08-27 15:40:40,549 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [696528193] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 15:40:40,549 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [264903889] [2023-08-27 15:40:40,549 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-27 15:40:40,550 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 15:40:40,550 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 15:40:40,552 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-27 15:40:40,558 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2023-08-27 15:40:40,709 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2023-08-27 15:40:40,710 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 15:40:40,711 INFO L262 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 45 conjunts are in the unsatisfiable core [2023-08-27 15:40:40,713 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 15:40:41,303 INFO L322 Elim1Store]: treesize reduction 13, result has 48.0 percent of original size [2023-08-27 15:40:41,303 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 73 treesize of output 40 [2023-08-27 15:40:41,345 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 15:40:41,345 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 15:40:47,124 INFO L322 Elim1Store]: treesize reduction 10, result has 90.5 percent of original size [2023-08-27 15:40:47,125 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 126 treesize of output 140 [2023-08-27 15:40:47,489 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-27 15:40:47,489 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [264903889] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 15:40:47,489 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 15:40:47,489 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 10, 7] total 22 [2023-08-27 15:40:47,489 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [736470248] [2023-08-27 15:40:47,490 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 15:40:47,490 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-08-27 15:40:47,490 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 15:40:47,490 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-08-27 15:40:47,490 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=375, Unknown=0, NotChecked=0, Total=462 [2023-08-27 15:40:47,492 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 125 out of 490 [2023-08-27 15:40:47,493 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 421 places, 939 transitions, 22563 flow. Second operand has 22 states, 22 states have (on average 127.0) internal successors, (2794), 22 states have internal predecessors, (2794), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 15:40:47,493 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 15:40:47,494 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 125 of 490 [2023-08-27 15:40:47,494 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 15:40:50,551 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-27 15:41:00,742 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-27 15:41:03,389 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-27 15:41:06,299 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-27 15:41:08,881 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-27 15:41:11,058 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-27 15:41:13,369 INFO L124 PetriNetUnfolderBase]: 2863/5363 cut-off events. [2023-08-27 15:41:13,369 INFO L125 PetriNetUnfolderBase]: For 135215/135215 co-relation queries the response was YES. [2023-08-27 15:41:13,407 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53465 conditions, 5363 events. 2863/5363 cut-off events. For 135215/135215 co-relation queries the response was YES. Maximal size of possible extension queue 361. Compared 39140 event pairs, 92 based on Foata normal form. 9/5371 useless extension candidates. Maximal degree in co-relation 53341. Up to 1215 conditions per place. [2023-08-27 15:41:13,428 INFO L140 encePairwiseOnDemand]: 478/490 looper letters, 439 selfloop transitions, 691 changer transitions 11/1141 dead transitions. [2023-08-27 15:41:13,428 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 463 places, 1141 transitions, 27173 flow [2023-08-27 15:41:13,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2023-08-27 15:41:13,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2023-08-27 15:41:13,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 6038 transitions. [2023-08-27 15:41:13,435 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2678793256433008 [2023-08-27 15:41:13,435 INFO L72 ComplementDD]: Start complementDD. Operand 46 states and 6038 transitions. [2023-08-27 15:41:13,435 INFO L73 IsDeterministic]: Start isDeterministic. Operand 46 states and 6038 transitions. [2023-08-27 15:41:13,436 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 15:41:13,436 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 46 states and 6038 transitions. [2023-08-27 15:41:13,440 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 47 states, 46 states have (on average 131.2608695652174) internal successors, (6038), 46 states have internal predecessors, (6038), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 15:41:13,492 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 47 states, 47 states have (on average 490.0) internal successors, (23030), 47 states have internal predecessors, (23030), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 15:41:13,493 INFO L81 ComplementDD]: Finished complementDD. Result has 47 states, 47 states have (on average 490.0) internal successors, (23030), 47 states have internal predecessors, (23030), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 15:41:13,493 INFO L175 Difference]: Start difference. First operand has 421 places, 939 transitions, 22563 flow. Second operand 46 states and 6038 transitions. [2023-08-27 15:41:13,493 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 463 places, 1141 transitions, 27173 flow [2023-08-27 15:41:14,702 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 445 places, 1141 transitions, 26544 flow, removed 247 selfloop flow, removed 18 redundant places. [2023-08-27 15:41:14,775 INFO L231 Difference]: Finished difference. Result has 458 places, 999 transitions, 25532 flow [2023-08-27 15:41:14,776 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=490, PETRI_DIFFERENCE_MINUEND_FLOW=22058, PETRI_DIFFERENCE_MINUEND_PLACES=400, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=939, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=633, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=281, PETRI_DIFFERENCE_SUBTRAHEND_STATES=46, PETRI_FLOW=25532, PETRI_PLACES=458, PETRI_TRANSITIONS=999} [2023-08-27 15:41:14,777 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 435 predicate places. [2023-08-27 15:41:14,777 INFO L495 AbstractCegarLoop]: Abstraction has has 458 places, 999 transitions, 25532 flow [2023-08-27 15:41:14,778 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 127.0) internal successors, (2794), 22 states have internal predecessors, (2794), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 15:41:14,778 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 15:41:14,778 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 15:41:14,787 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2023-08-27 15:41:14,984 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 15:41:14,984 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT (and 2 more)] === [2023-08-27 15:41:14,985 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 15:41:14,985 INFO L85 PathProgramCache]: Analyzing trace with hash 1776493733, now seen corresponding path program 13 times [2023-08-27 15:41:14,985 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 15:41:14,985 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [799295995] [2023-08-27 15:41:14,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 15:41:14,985 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 15:41:15,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 15:41:15,243 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-27 15:41:15,243 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 15:41:15,243 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [799295995] [2023-08-27 15:41:15,244 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [799295995] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 15:41:15,244 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1759375864] [2023-08-27 15:41:15,244 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-27 15:41:15,244 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 15:41:15,244 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 15:41:15,245 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-27 15:41:15,246 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2023-08-27 15:41:15,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 15:41:15,425 INFO L262 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 12 conjunts are in the unsatisfiable core [2023-08-27 15:41:15,427 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 15:41:15,564 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 92 treesize of output 84 [2023-08-27 15:41:15,588 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 100 treesize of output 92 [2023-08-27 15:41:15,635 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-27 15:41:15,635 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 15:41:15,767 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 112 treesize of output 104 [2023-08-27 15:41:15,839 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 114 treesize of output 106 [2023-08-27 15:41:16,045 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-27 15:41:16,045 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1759375864] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 15:41:16,045 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 15:41:16,045 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 16 [2023-08-27 15:41:16,046 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1117647972] [2023-08-27 15:41:16,046 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 15:41:16,046 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-08-27 15:41:16,046 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 15:41:16,046 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-08-27 15:41:16,046 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=184, Unknown=0, NotChecked=0, Total=240 [2023-08-27 15:41:16,047 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 178 out of 490 [2023-08-27 15:41:16,049 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 458 places, 999 transitions, 25532 flow. Second operand has 16 states, 16 states have (on average 179.75) internal successors, (2876), 16 states have internal predecessors, (2876), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 15:41:16,049 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 15:41:16,049 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 178 of 490 [2023-08-27 15:41:16,049 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 15:41:20,019 INFO L124 PetriNetUnfolderBase]: 3403/6393 cut-off events. [2023-08-27 15:41:20,019 INFO L125 PetriNetUnfolderBase]: For 185528/185528 co-relation queries the response was YES. [2023-08-27 15:41:20,069 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67131 conditions, 6393 events. 3403/6393 cut-off events. For 185528/185528 co-relation queries the response was YES. Maximal size of possible extension queue 436. Compared 48389 event pairs, 212 based on Foata normal form. 28/6420 useless extension candidates. Maximal degree in co-relation 66997. Up to 1475 conditions per place. [2023-08-27 15:41:20,094 INFO L140 encePairwiseOnDemand]: 483/490 looper letters, 620 selfloop transitions, 675 changer transitions 1/1296 dead transitions. [2023-08-27 15:41:20,094 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 489 places, 1296 transitions, 33739 flow [2023-08-27 15:41:20,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2023-08-27 15:41:20,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2023-08-27 15:41:20,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 6094 transitions. [2023-08-27 15:41:20,098 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3768707482993197 [2023-08-27 15:41:20,098 INFO L72 ComplementDD]: Start complementDD. Operand 33 states and 6094 transitions. [2023-08-27 15:41:20,098 INFO L73 IsDeterministic]: Start isDeterministic. Operand 33 states and 6094 transitions. [2023-08-27 15:41:20,099 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 15:41:20,099 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 33 states and 6094 transitions. [2023-08-27 15:41:20,104 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 34 states, 33 states have (on average 184.66666666666666) internal successors, (6094), 33 states have internal predecessors, (6094), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 15:41:20,112 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 34 states, 34 states have (on average 490.0) internal successors, (16660), 34 states have internal predecessors, (16660), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 15:41:20,113 INFO L81 ComplementDD]: Finished complementDD. Result has 34 states, 34 states have (on average 490.0) internal successors, (16660), 34 states have internal predecessors, (16660), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 15:41:20,113 INFO L175 Difference]: Start difference. First operand has 458 places, 999 transitions, 25532 flow. Second operand 33 states and 6094 transitions. [2023-08-27 15:41:20,113 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 489 places, 1296 transitions, 33739 flow [2023-08-27 15:41:22,041 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 460 places, 1296 transitions, 32670 flow, removed 255 selfloop flow, removed 29 redundant places. [2023-08-27 15:41:22,070 INFO L231 Difference]: Finished difference. Result has 477 places, 1151 transitions, 30737 flow [2023-08-27 15:41:22,072 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=490, PETRI_DIFFERENCE_MINUEND_FLOW=24647, PETRI_DIFFERENCE_MINUEND_PLACES=428, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=997, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=528, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=424, PETRI_DIFFERENCE_SUBTRAHEND_STATES=33, PETRI_FLOW=30737, PETRI_PLACES=477, PETRI_TRANSITIONS=1151} [2023-08-27 15:41:22,072 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 454 predicate places. [2023-08-27 15:41:22,072 INFO L495 AbstractCegarLoop]: Abstraction has has 477 places, 1151 transitions, 30737 flow [2023-08-27 15:41:22,073 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 179.75) internal successors, (2876), 16 states have internal predecessors, (2876), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 15:41:22,073 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 15:41:22,073 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 15:41:22,079 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2023-08-27 15:41:22,279 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 15:41:22,279 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT (and 2 more)] === [2023-08-27 15:41:22,279 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 15:41:22,279 INFO L85 PathProgramCache]: Analyzing trace with hash -1539715839, now seen corresponding path program 14 times [2023-08-27 15:41:22,279 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 15:41:22,280 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1371238865] [2023-08-27 15:41:22,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 15:41:22,280 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 15:41:22,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 15:41:22,520 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-27 15:41:22,520 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 15:41:22,520 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1371238865] [2023-08-27 15:41:22,520 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1371238865] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 15:41:22,520 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [183198925] [2023-08-27 15:41:22,520 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-27 15:41:22,520 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 15:41:22,521 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 15:41:22,525 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-27 15:41:22,548 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2023-08-27 15:41:22,742 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-27 15:41:22,742 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 15:41:22,744 INFO L262 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 55 conjunts are in the unsatisfiable core [2023-08-27 15:41:22,747 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 15:41:22,830 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-08-27 15:41:22,882 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 15:41:22,947 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 15:41:23,465 INFO L322 Elim1Store]: treesize reduction 13, result has 48.0 percent of original size [2023-08-27 15:41:23,465 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 73 treesize of output 40 [2023-08-27 15:41:23,511 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 15:41:23,511 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 15:41:39,252 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-27 15:41:39,252 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [183198925] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 15:41:39,252 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 15:41:39,252 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 11, 8] total 24 [2023-08-27 15:41:39,252 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1220299847] [2023-08-27 15:41:39,253 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 15:41:39,253 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-08-27 15:41:39,253 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 15:41:39,253 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-08-27 15:41:39,253 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=450, Unknown=1, NotChecked=0, Total=552 [2023-08-27 15:41:39,255 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 118 out of 490 [2023-08-27 15:41:39,256 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 477 places, 1151 transitions, 30737 flow. Second operand has 24 states, 24 states have (on average 119.83333333333333) internal successors, (2876), 24 states have internal predecessors, (2876), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 15:41:39,256 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 15:41:39,256 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 118 of 490 [2023-08-27 15:41:39,256 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 15:41:45,782 WARN L234 SmtUtils]: Spent 6.17s on a formula simplification that was a NOOP. DAG size: 74 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-27 15:41:54,852 WARN L234 SmtUtils]: Spent 8.15s on a formula simplification that was a NOOP. DAG size: 83 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-27 15:41:57,838 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.26s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-27 15:42:11,566 WARN L234 SmtUtils]: Spent 13.25s on a formula simplification that was a NOOP. DAG size: 163 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-27 15:42:21,304 WARN L234 SmtUtils]: Spent 5.22s on a formula simplification that was a NOOP. DAG size: 172 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-27 15:42:22,571 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.09s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-27 15:42:23,589 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.01s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-27 15:42:26,623 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-27 15:42:47,263 WARN L234 SmtUtils]: Spent 11.95s on a formula simplification that was a NOOP. DAG size: 222 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-27 15:42:51,519 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.40s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-27 15:43:10,727 WARN L234 SmtUtils]: Spent 8.54s on a formula simplification that was a NOOP. DAG size: 227 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-27 15:43:19,444 WARN L234 SmtUtils]: Spent 6.59s on a formula simplification. DAG size of input: 206 DAG size of output: 180 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-27 15:43:26,424 WARN L234 SmtUtils]: Spent 6.22s on a formula simplification. DAG size of input: 84 DAG size of output: 82 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-27 15:43:28,897 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-27 15:43:31,298 WARN L539 Checker$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 15:43:41,512 WARN L234 SmtUtils]: Spent 8.43s on a formula simplification that was a NOOP. DAG size: 184 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-27 15:43:46,301 INFO L124 PetriNetUnfolderBase]: 3533/6683 cut-off events. [2023-08-27 15:43:46,301 INFO L125 PetriNetUnfolderBase]: For 208899/208899 co-relation queries the response was YES. [2023-08-27 15:43:46,355 INFO L83 FinitePrefix]: Finished finitePrefix Result has 72510 conditions, 6683 events. 3533/6683 cut-off events. For 208899/208899 co-relation queries the response was YES. Maximal size of possible extension queue 468. Compared 51501 event pairs, 185 based on Foata normal form. 11/6693 useless extension candidates. Maximal degree in co-relation 72367. Up to 4041 conditions per place. [2023-08-27 15:43:46,382 INFO L140 encePairwiseOnDemand]: 479/490 looper letters, 730 selfloop transitions, 600 changer transitions 11/1341 dead transitions. [2023-08-27 15:43:46,383 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 528 places, 1341 transitions, 35771 flow [2023-08-27 15:43:46,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2023-08-27 15:43:46,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2023-08-27 15:43:46,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 6414 transitions. [2023-08-27 15:43:46,387 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2517268445839874 [2023-08-27 15:43:46,387 INFO L72 ComplementDD]: Start complementDD. Operand 52 states and 6414 transitions. [2023-08-27 15:43:46,387 INFO L73 IsDeterministic]: Start isDeterministic. Operand 52 states and 6414 transitions. [2023-08-27 15:43:46,388 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 15:43:46,389 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 52 states and 6414 transitions. [2023-08-27 15:43:46,394 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 53 states, 52 states have (on average 123.34615384615384) internal successors, (6414), 52 states have internal predecessors, (6414), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 15:43:46,408 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 53 states, 53 states have (on average 490.0) internal successors, (25970), 53 states have internal predecessors, (25970), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 15:43:46,409 INFO L81 ComplementDD]: Finished complementDD. Result has 53 states, 53 states have (on average 490.0) internal successors, (25970), 53 states have internal predecessors, (25970), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 15:43:46,409 INFO L175 Difference]: Start difference. First operand has 477 places, 1151 transitions, 30737 flow. Second operand 52 states and 6414 transitions. [2023-08-27 15:43:46,410 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 528 places, 1341 transitions, 35771 flow [2023-08-27 15:43:48,443 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 521 places, 1341 transitions, 35214 flow, removed 212 selfloop flow, removed 7 redundant places. [2023-08-27 15:43:48,467 INFO L231 Difference]: Finished difference. Result has 534 places, 1216 transitions, 34138 flow [2023-08-27 15:43:48,468 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=490, PETRI_DIFFERENCE_MINUEND_FLOW=30204, PETRI_DIFFERENCE_MINUEND_PLACES=470, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1150, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=535, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=577, PETRI_DIFFERENCE_SUBTRAHEND_STATES=52, PETRI_FLOW=34138, PETRI_PLACES=534, PETRI_TRANSITIONS=1216} [2023-08-27 15:43:48,468 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 511 predicate places. [2023-08-27 15:43:48,468 INFO L495 AbstractCegarLoop]: Abstraction has has 534 places, 1216 transitions, 34138 flow [2023-08-27 15:43:48,469 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 119.83333333333333) internal successors, (2876), 24 states have internal predecessors, (2876), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 15:43:48,469 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 15:43:48,469 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 15:43:48,474 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2023-08-27 15:43:48,669 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2023-08-27 15:43:48,669 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT (and 2 more)] === [2023-08-27 15:43:48,670 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 15:43:48,670 INFO L85 PathProgramCache]: Analyzing trace with hash -2089292997, now seen corresponding path program 15 times [2023-08-27 15:43:48,670 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 15:43:48,670 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1825923355] [2023-08-27 15:43:48,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 15:43:48,670 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 15:43:48,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 15:43:48,909 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-27 15:43:48,909 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 15:43:48,909 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1825923355] [2023-08-27 15:43:48,909 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1825923355] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 15:43:48,909 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1828715305] [2023-08-27 15:43:48,909 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-27 15:43:48,910 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 15:43:48,910 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 15:43:48,913 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-27 15:43:48,918 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2023-08-27 15:43:49,078 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-08-27 15:43:49,079 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 15:43:49,080 INFO L262 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 44 conjunts are in the unsatisfiable core [2023-08-27 15:43:49,082 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 15:43:49,491 INFO L322 Elim1Store]: treesize reduction 38, result has 28.3 percent of original size [2023-08-27 15:43:49,491 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 5 new quantified variables, introduced 6 case distinctions, treesize of input 347 treesize of output 328 [2023-08-27 15:43:49,690 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 15:43:49,691 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 15:43:56,205 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 15:43:56,206 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 430 treesize of output 342 [2023-08-27 15:44:10,114 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-27 15:44:10,115 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1828715305] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 15:44:10,115 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 15:44:10,115 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 10, 7] total 22 [2023-08-27 15:44:10,115 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2046426182] [2023-08-27 15:44:10,115 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 15:44:10,115 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-08-27 15:44:10,115 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 15:44:10,116 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-08-27 15:44:10,116 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=371, Unknown=0, NotChecked=0, Total=462 [2023-08-27 15:44:10,117 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 125 out of 490 [2023-08-27 15:44:10,118 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 534 places, 1216 transitions, 34138 flow. Second operand has 22 states, 22 states have (on average 126.86363636363636) internal successors, (2791), 22 states have internal predecessors, (2791), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 15:44:10,118 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 15:44:10,118 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 125 of 490 [2023-08-27 15:44:10,118 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 15:44:14,018 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.83s for a HTC check with result VALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-27 15:44:25,284 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-27 15:44:27,292 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-27 15:45:33,027 WARN L234 SmtUtils]: Spent 59.95s on a formula simplification. DAG size of input: 203 DAG size of output: 203 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-27 15:45:35,470 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-27 15:45:42,186 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.02s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-27 15:45:44,213 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-27 15:45:46,236 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-27 15:45:48,245 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-27 15:45:50,364 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-27 15:45:52,374 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-27 15:45:54,422 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-27 15:46:01,376 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-27 15:46:03,395 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-27 15:46:08,049 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-27 15:46:15,496 INFO L124 PetriNetUnfolderBase]: 3861/7346 cut-off events. [2023-08-27 15:46:15,496 INFO L125 PetriNetUnfolderBase]: For 253532/253532 co-relation queries the response was YES. [2023-08-27 15:46:15,560 INFO L83 FinitePrefix]: Finished finitePrefix Result has 83519 conditions, 7346 events. 3861/7346 cut-off events. For 253532/253532 co-relation queries the response was YES. Maximal size of possible extension queue 520. Compared 57873 event pairs, 196 based on Foata normal form. 14/7359 useless extension candidates. Maximal degree in co-relation 83364. Up to 4554 conditions per place. [2023-08-27 15:46:15,590 INFO L140 encePairwiseOnDemand]: 478/490 looper letters, 817 selfloop transitions, 609 changer transitions 15/1441 dead transitions. [2023-08-27 15:46:15,590 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 576 places, 1441 transitions, 40742 flow [2023-08-27 15:46:15,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2023-08-27 15:46:15,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2023-08-27 15:46:15,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 5750 transitions. [2023-08-27 15:46:15,596 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.26669758812615957 [2023-08-27 15:46:15,596 INFO L72 ComplementDD]: Start complementDD. Operand 44 states and 5750 transitions. [2023-08-27 15:46:15,596 INFO L73 IsDeterministic]: Start isDeterministic. Operand 44 states and 5750 transitions. [2023-08-27 15:46:15,597 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 15:46:15,597 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 44 states and 5750 transitions. [2023-08-27 15:46:15,600 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 45 states, 44 states have (on average 130.6818181818182) internal successors, (5750), 44 states have internal predecessors, (5750), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 15:46:15,607 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 45 states, 45 states have (on average 490.0) internal successors, (22050), 45 states have internal predecessors, (22050), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 15:46:15,608 INFO L81 ComplementDD]: Finished complementDD. Result has 45 states, 45 states have (on average 490.0) internal successors, (22050), 45 states have internal predecessors, (22050), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 15:46:15,608 INFO L175 Difference]: Start difference. First operand has 534 places, 1216 transitions, 34138 flow. Second operand 44 states and 5750 transitions. [2023-08-27 15:46:15,608 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 576 places, 1441 transitions, 40742 flow [2023-08-27 15:46:18,016 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 547 places, 1441 transitions, 40399 flow, removed 79 selfloop flow, removed 29 redundant places. [2023-08-27 15:46:18,045 INFO L231 Difference]: Finished difference. Result has 560 places, 1302 transitions, 38653 flow [2023-08-27 15:46:18,046 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=490, PETRI_DIFFERENCE_MINUEND_FLOW=33770, PETRI_DIFFERENCE_MINUEND_PLACES=504, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1214, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=524, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=643, PETRI_DIFFERENCE_SUBTRAHEND_STATES=44, PETRI_FLOW=38653, PETRI_PLACES=560, PETRI_TRANSITIONS=1302} [2023-08-27 15:46:18,046 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 537 predicate places. [2023-08-27 15:46:18,046 INFO L495 AbstractCegarLoop]: Abstraction has has 560 places, 1302 transitions, 38653 flow [2023-08-27 15:46:18,046 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 126.86363636363636) internal successors, (2791), 22 states have internal predecessors, (2791), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 15:46:18,046 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 15:46:18,047 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 15:46:18,052 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2023-08-27 15:46:18,247 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2023-08-27 15:46:18,247 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT (and 2 more)] === [2023-08-27 15:46:18,247 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 15:46:18,247 INFO L85 PathProgramCache]: Analyzing trace with hash -1546185867, now seen corresponding path program 16 times [2023-08-27 15:46:18,248 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 15:46:18,248 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [753567897] [2023-08-27 15:46:18,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 15:46:18,248 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 15:46:18,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 15:46:18,458 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-27 15:46:18,458 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 15:46:18,458 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [753567897] [2023-08-27 15:46:18,458 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [753567897] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 15:46:18,458 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1917004179] [2023-08-27 15:46:18,458 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-27 15:46:18,459 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 15:46:18,459 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 15:46:18,460 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-27 15:46:18,464 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2023-08-27 15:46:18,623 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-27 15:46:18,623 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 15:46:18,624 INFO L262 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 32 conjunts are in the unsatisfiable core [2023-08-27 15:46:18,625 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 15:46:19,002 INFO L322 Elim1Store]: treesize reduction 25, result has 56.1 percent of original size [2023-08-27 15:46:19,003 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 5 new quantified variables, introduced 6 case distinctions, treesize of input 339 treesize of output 341 [2023-08-27 15:46:19,236 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-27 15:46:19,236 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 15:46:25,780 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 15:46:25,780 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 354 treesize of output 315 Received shutdown request... [2023-08-27 15:46:28,186 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2023-08-27 15:46:28,186 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 15:46:28,202 WARN L266 SmtUtils]: Removed 2 from assertion stack [2023-08-27 15:46:28,205 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr2ASSERT_VIOLATIONASSERT (4 of 5 remaining) [2023-08-27 15:46:28,214 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2023-08-27 15:46:28,406 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2023-08-27 15:46:28,406 WARN L619 AbstractCegarLoop]: Verification canceled: while CegarLoopForPetriNet was analyzing trace of length 19 with TraceHistMax 2,while TraceCheckSpWp was constructing backward predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 4 for 44ms.. [2023-08-27 15:46:28,407 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW (3 of 5 remaining) [2023-08-27 15:46:28,407 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW (2 of 5 remaining) [2023-08-27 15:46:28,407 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 5 remaining) [2023-08-27 15:46:28,408 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 5 remaining) [2023-08-27 15:46:28,408 INFO L445 BasicCegarLoop]: Path program histogram: [16, 9, 6, 2, 1, 1, 1] [2023-08-27 15:46:28,410 INFO L228 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2023-08-27 15:46:28,410 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-08-27 15:46:28,411 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 27.08 03:46:28 BasicIcfg [2023-08-27 15:46:28,411 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-08-27 15:46:28,412 INFO L158 Benchmark]: Toolchain (without parser) took 829434.25ms. Allocated memory was 402.7MB in the beginning and 1.5GB in the end (delta: 1.1GB). Free memory was 358.8MB in the beginning and 632.2MB in the end (delta: -273.5MB). Peak memory consumption was 838.0MB. Max. memory is 16.0GB. [2023-08-27 15:46:28,412 INFO L158 Benchmark]: CDTParser took 0.11ms. Allocated memory is still 402.7MB. Free memory is still 380.5MB. There was no memory consumed. Max. memory is 16.0GB. [2023-08-27 15:46:28,412 INFO L158 Benchmark]: CACSL2BoogieTranslator took 251.86ms. Allocated memory is still 402.7MB. Free memory was 358.8MB in the beginning and 347.2MB in the end (delta: 11.5MB). Peak memory consumption was 10.5MB. Max. memory is 16.0GB. [2023-08-27 15:46:28,412 INFO L158 Benchmark]: Boogie Procedure Inliner took 60.09ms. Allocated memory is still 402.7MB. Free memory was 347.2MB in the beginning and 345.1MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. [2023-08-27 15:46:28,412 INFO L158 Benchmark]: Boogie Preprocessor took 41.03ms. Allocated memory is still 402.7MB. Free memory was 345.1MB in the beginning and 343.0MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. [2023-08-27 15:46:28,413 INFO L158 Benchmark]: RCFGBuilder took 536.50ms. Allocated memory is still 402.7MB. Free memory was 343.0MB in the beginning and 322.1MB in the end (delta: 21.0MB). Peak memory consumption was 21.0MB. Max. memory is 16.0GB. [2023-08-27 15:46:28,413 INFO L158 Benchmark]: TraceAbstraction took 828539.79ms. Allocated memory was 402.7MB in the beginning and 1.5GB in the end (delta: 1.1GB). Free memory was 321.0MB in the beginning and 632.2MB in the end (delta: -311.2MB). Peak memory consumption was 800.3MB. Max. memory is 16.0GB. [2023-08-27 15:46:28,413 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.11ms. Allocated memory is still 402.7MB. Free memory is still 380.5MB. There was no memory consumed. Max. memory is 16.0GB. * CACSL2BoogieTranslator took 251.86ms. Allocated memory is still 402.7MB. Free memory was 358.8MB in the beginning and 347.2MB in the end (delta: 11.5MB). Peak memory consumption was 10.5MB. Max. memory is 16.0GB. * Boogie Procedure Inliner took 60.09ms. Allocated memory is still 402.7MB. Free memory was 347.2MB in the beginning and 345.1MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. * Boogie Preprocessor took 41.03ms. Allocated memory is still 402.7MB. Free memory was 345.1MB in the beginning and 343.0MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. * RCFGBuilder took 536.50ms. Allocated memory is still 402.7MB. Free memory was 343.0MB in the beginning and 322.1MB in the end (delta: 21.0MB). Peak memory consumption was 21.0MB. Max. memory is 16.0GB. * TraceAbstraction took 828539.79ms. Allocated memory was 402.7MB in the beginning and 1.5GB in the end (delta: 1.1GB). Free memory was 321.0MB in the beginning and 632.2MB in the end (delta: -311.2MB). Peak memory consumption was 800.3MB. Max. memory is 16.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 10.0s, 203 PlacesBefore, 23 PlacesAfterwards, 217 TransitionsBefore, 19 TransitionsAfterwards, 5492 CoEnabledTransitionPairs, 8 FixpointIterations, 72 TrivialSequentialCompositions, 114 ConcurrentSequentialCompositions, 18 TrivialYvCompositions, 40 ConcurrentYvCompositions, 18 ChoiceCompositions, 262 TotalNumberOfCompositions, 5321 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 5243, independent: 5235, independent conditional: 0, independent unconditional: 5235, dependent: 8, dependent conditional: 0, dependent unconditional: 8, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 3310, independent: 3306, independent conditional: 0, independent unconditional: 3306, dependent: 4, dependent conditional: 0, dependent unconditional: 4, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 5243, independent: 1929, independent conditional: 0, independent unconditional: 1929, dependent: 4, dependent conditional: 0, dependent unconditional: 4, unknown: 3310, unknown conditional: 0, unknown unconditional: 3310] , 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 19 with TraceHistMax 2,while TraceCheckSpWp was constructing backward predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 4 for 44ms.. - TimeoutResultAtElement [Line: 117]: Timeout (TraceAbstraction) Unable to prove that integer overflow can never occur Cancelled while CegarLoopForPetriNet was analyzing trace of length 19 with TraceHistMax 2,while TraceCheckSpWp was constructing backward predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 4 for 44ms.. - TimeoutResultAtElement [Line: 117]: Timeout (TraceAbstraction) Unable to prove that integer overflow can never occur Cancelled while CegarLoopForPetriNet was analyzing trace of length 19 with TraceHistMax 2,while TraceCheckSpWp was constructing backward predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 4 for 44ms.. - TimeoutResultAtElement [Line: 102]: 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 19 with TraceHistMax 2,while TraceCheckSpWp was constructing backward predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 4 for 44ms.. - TimeoutResultAtElement [Line: 101]: 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 19 with TraceHistMax 2,while TraceCheckSpWp was constructing backward predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 4 for 44ms.. - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 5 procedures, 319 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: 828.4s, OverallIterations: 36, TraceHistogramMax: 4, PathProgramHistogramMax: 16, EmptinessCheckTime: 0.0s, AutomataDifference: 634.7s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 10.2s, HoareTripleCheckerStatistics: 183 mSolverCounterUnknown, 3908 SdHoareTripleChecker+Valid, 193.4s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 3908 mSDsluCounter, 904 SdHoareTripleChecker+Invalid, 190.5s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 755 mSDsCounter, 983 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 14617 IncrementalHoareTripleChecker+Invalid, 15783 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 983 mSolverCounterUnsat, 149 mSDtfsCounter, 14617 mSolverCounterSat, 0.1s SdHoareTripleChecker+Time, 183 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 1694 GetRequests, 776 SyntacticMatches, 6 SemanticMatches, 912 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9913 ImplicationChecksByTransitivity, 436.9s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=38653occurred in iteration=35, InterpolantAutomatonStates: 804, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.4s SsaConstructionTime, 2.8s SatisfiabilityAnalysisTime, 162.1s InterpolantComputationTime, 945 NumberOfCodeBlocks, 941 NumberOfCodeBlocksAsserted, 80 NumberOfCheckSat, 1271 ConstructedInterpolants, 28 QuantifiedInterpolants, 28465 SizeOfPredicates, 668 NumberOfNonLiveVariables, 4416 ConjunctsInSsa, 682 ConjunctsInUnsatCore, 86 InterpolantComputations, 10 PerfectInterpolantSequences, 152/327 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