/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/popl20-more-min-array-hom.wvr.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-ac9dbd0-m [2023-08-27 14:24:48,118 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-08-27 14:24:48,197 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 14:24:48,203 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-08-27 14:24:48,203 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Checked method. Library mode if empty. [2023-08-27 14:24:48,235 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-27 14:24:48,236 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-27 14:24:48,236 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-27 14:24:48,237 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-27 14:24:48,241 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-08-27 14:24:48,241 INFO L153 SettingsManager]: * Use SBE=true [2023-08-27 14:24:48,241 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-27 14:24:48,241 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-27 14:24:48,242 INFO L153 SettingsManager]: * sizeof long=4 [2023-08-27 14:24:48,243 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-27 14:24:48,243 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-08-27 14:24:48,243 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-08-27 14:24:48,243 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-27 14:24:48,243 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-27 14:24:48,244 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-27 14:24:48,244 INFO L153 SettingsManager]: * sizeof long double=12 [2023-08-27 14:24:48,244 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-08-27 14:24:48,244 INFO L153 SettingsManager]: * Use constant arrays=true [2023-08-27 14:24:48,245 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-27 14:24:48,245 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-27 14:24:48,245 INFO L153 SettingsManager]: * To the following directory=./dump/ [2023-08-27 14:24:48,245 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-27 14:24:48,246 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-27 14:24:48,246 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-27 14:24:48,246 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-27 14:24:48,247 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-27 14:24:48,247 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-27 14:24:48,247 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-27 14:24:48,248 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-27 14:24:48,248 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-27 14:24:48,248 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Order of the error locations to be checked -> PROGRAM_FIRST Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check absence of signed integer overflows -> true [2023-08-27 14:24:48,536 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-27 14:24:48,559 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-27 14:24:48,561 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-27 14:24:48,562 INFO L270 PluginConnector]: Initializing CDTParser... [2023-08-27 14:24:48,562 INFO L274 PluginConnector]: CDTParser initialized [2023-08-27 14:24:48,563 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/popl20-more-min-array-hom.wvr.c [2023-08-27 14:24:49,636 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-08-27 14:24:49,887 INFO L384 CDTParser]: Found 1 translation units. [2023-08-27 14:24:49,887 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-more-min-array-hom.wvr.c [2023-08-27 14:24:49,896 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/647adeced/5900b07b3fd84284bc0234f24d34f4c8/FLAGda27ee613 [2023-08-27 14:24:49,916 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/647adeced/5900b07b3fd84284bc0234f24d34f4c8 [2023-08-27 14:24:49,921 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-27 14:24:49,922 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-08-27 14:24:49,925 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-27 14:24:49,925 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-27 14:24:49,927 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-27 14:24:49,929 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.08 02:24:49" (1/1) ... [2023-08-27 14:24:49,930 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2296072e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 02:24:49, skipping insertion in model container [2023-08-27 14:24:49,930 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.08 02:24:49" (1/1) ... [2023-08-27 14:24:49,955 INFO L176 MainTranslator]: Built tables and reachable declarations [2023-08-27 14:24:50,145 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-27 14:24:50,155 INFO L201 MainTranslator]: Completed pre-run [2023-08-27 14:24:50,196 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-27 14:24:50,202 WARN L669 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-08-27 14:24:50,202 WARN L669 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-08-27 14:24:50,211 INFO L206 MainTranslator]: Completed translation [2023-08-27 14:24:50,211 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 02:24:50 WrapperNode [2023-08-27 14:24:50,211 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-27 14:24:50,213 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-27 14:24:50,213 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-27 14:24:50,213 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-27 14:24:50,219 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 02:24:50" (1/1) ... [2023-08-27 14:24:50,237 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 02:24:50" (1/1) ... [2023-08-27 14:24:50,260 INFO L138 Inliner]: procedures = 24, calls = 44, calls flagged for inlining = 8, calls inlined = 8, statements flattened = 110 [2023-08-27 14:24:50,261 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-27 14:24:50,262 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-27 14:24:50,262 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-27 14:24:50,263 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-08-27 14:24:50,272 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 02:24:50" (1/1) ... [2023-08-27 14:24:50,273 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 02:24:50" (1/1) ... [2023-08-27 14:24:50,275 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 02:24:50" (1/1) ... [2023-08-27 14:24:50,275 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 02:24:50" (1/1) ... [2023-08-27 14:24:50,292 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 02:24:50" (1/1) ... [2023-08-27 14:24:50,295 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 02:24:50" (1/1) ... [2023-08-27 14:24:50,297 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 02:24:50" (1/1) ... [2023-08-27 14:24:50,298 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 02:24:50" (1/1) ... [2023-08-27 14:24:50,300 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-27 14:24:50,309 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-27 14:24:50,309 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-08-27 14:24:50,309 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-08-27 14:24:50,310 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 02:24:50" (1/1) ... [2023-08-27 14:24:50,315 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-27 14:24:50,331 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 14:24:50,346 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 14:24:50,368 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 14:24:50,392 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-27 14:24:50,392 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-08-27 14:24:50,392 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-08-27 14:24:50,393 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-08-27 14:24:50,393 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-08-27 14:24:50,393 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2023-08-27 14:24:50,393 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2023-08-27 14:24:50,393 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-27 14:24:50,394 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-27 14:24:50,394 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-27 14:24:50,394 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-08-27 14:24:50,394 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-08-27 14:24:50,394 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-08-27 14:24:50,394 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-27 14:24:50,394 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-27 14:24:50,394 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-27 14:24:50,395 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-27 14:24:50,396 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 14:24:50,501 INFO L236 CfgBuilder]: Building ICFG [2023-08-27 14:24:50,503 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-27 14:24:50,779 INFO L277 CfgBuilder]: Performing block encoding [2023-08-27 14:24:50,857 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-27 14:24:50,857 INFO L302 CfgBuilder]: Removed 4 assume(true) statements. [2023-08-27 14:24:50,863 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.08 02:24:50 BoogieIcfgContainer [2023-08-27 14:24:50,863 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-27 14:24:50,865 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-27 14:24:50,865 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-08-27 14:24:50,868 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-08-27 14:24:50,868 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.08 02:24:49" (1/3) ... [2023-08-27 14:24:50,869 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6624584a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.08 02:24:50, skipping insertion in model container [2023-08-27 14:24:50,869 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 02:24:50" (2/3) ... [2023-08-27 14:24:50,869 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6624584a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.08 02:24:50, skipping insertion in model container [2023-08-27 14:24:50,869 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.08 02:24:50" (3/3) ... [2023-08-27 14:24:50,870 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-more-min-array-hom.wvr.c [2023-08-27 14:24:50,888 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-27 14:24:50,888 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 9 error locations. [2023-08-27 14:24:50,889 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-27 14:24:50,975 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2023-08-27 14:24:51,043 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 164 places, 166 transitions, 356 flow [2023-08-27 14:24:51,160 INFO L124 PetriNetUnfolderBase]: 12/163 cut-off events. [2023-08-27 14:24:51,160 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-08-27 14:24:51,166 INFO L83 FinitePrefix]: Finished finitePrefix Result has 176 conditions, 163 events. 12/163 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 156 event pairs, 0 based on Foata normal form. 0/142 useless extension candidates. Maximal degree in co-relation 121. Up to 2 conditions per place. [2023-08-27 14:24:51,166 INFO L82 GeneralOperation]: Start removeDead. Operand has 164 places, 166 transitions, 356 flow [2023-08-27 14:24:51,175 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 150 places, 152 transitions, 322 flow [2023-08-27 14:24:51,179 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-27 14:24:51,191 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 150 places, 152 transitions, 322 flow [2023-08-27 14:24:51,195 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 150 places, 152 transitions, 322 flow [2023-08-27 14:24:51,196 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 150 places, 152 transitions, 322 flow [2023-08-27 14:24:51,233 INFO L124 PetriNetUnfolderBase]: 12/152 cut-off events. [2023-08-27 14:24:51,234 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-08-27 14:24:51,236 INFO L83 FinitePrefix]: Finished finitePrefix Result has 165 conditions, 152 events. 12/152 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 155 event pairs, 0 based on Foata normal form. 0/132 useless extension candidates. Maximal degree in co-relation 121. Up to 2 conditions per place. [2023-08-27 14:24:51,238 INFO L119 LiptonReduction]: Number of co-enabled transitions 2430 [2023-08-27 14:24:56,416 INFO L134 LiptonReduction]: Checked pairs total: 2933 [2023-08-27 14:24:56,416 INFO L136 LiptonReduction]: Total number of compositions: 159 [2023-08-27 14:24:56,428 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-27 14:24:56,433 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;@20ed94e7, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-27 14:24:56,434 INFO L358 AbstractCegarLoop]: Starting to check reachability of 18 error locations. [2023-08-27 14:24:56,436 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-27 14:24:56,436 INFO L124 PetriNetUnfolderBase]: 1/2 cut-off events. [2023-08-27 14:24:56,436 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-27 14:24:56,436 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 14:24:56,436 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-27 14:24:56,437 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 15 more)] === [2023-08-27 14:24:56,441 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 14:24:56,441 INFO L85 PathProgramCache]: Analyzing trace with hash 21671, now seen corresponding path program 1 times [2023-08-27 14:24:56,449 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 14:24:56,449 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [849133390] [2023-08-27 14:24:56,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 14:24:56,450 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 14:24:56,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 14:24:56,763 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 14:24:56,764 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 14:24:56,764 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [849133390] [2023-08-27 14:24:56,764 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [849133390] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-27 14:24:56,765 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-27 14:24:56,765 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-27 14:24:56,766 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1217520203] [2023-08-27 14:24:56,767 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-27 14:24:56,774 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-27 14:24:56,780 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 14:24:56,804 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-27 14:24:56,805 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-27 14:24:56,808 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 140 out of 325 [2023-08-27 14:24:56,813 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 38 places, 32 transitions, 82 flow. Second operand has 3 states, 3 states have (on average 140.66666666666666) internal successors, (422), 3 states have internal predecessors, (422), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:24:56,813 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 14:24:56,813 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 140 of 325 [2023-08-27 14:24:56,814 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 14:24:57,101 INFO L124 PetriNetUnfolderBase]: 1226/1603 cut-off events. [2023-08-27 14:24:57,102 INFO L125 PetriNetUnfolderBase]: For 47/47 co-relation queries the response was YES. [2023-08-27 14:24:57,106 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3274 conditions, 1603 events. 1226/1603 cut-off events. For 47/47 co-relation queries the response was YES. Maximal size of possible extension queue 148. Compared 6139 event pairs, 578 based on Foata normal form. 0/562 useless extension candidates. Maximal degree in co-relation 2744. Up to 1573 conditions per place. [2023-08-27 14:24:57,116 INFO L140 encePairwiseOnDemand]: 320/325 looper letters, 28 selfloop transitions, 3 changer transitions 0/34 dead transitions. [2023-08-27 14:24:57,117 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 40 places, 34 transitions, 148 flow [2023-08-27 14:24:57,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-27 14:24:57,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-27 14:24:57,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 453 transitions. [2023-08-27 14:24:57,130 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4646153846153846 [2023-08-27 14:24:57,131 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 453 transitions. [2023-08-27 14:24:57,131 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 453 transitions. [2023-08-27 14:24:57,132 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 14:24:57,134 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 453 transitions. [2023-08-27 14:24:57,138 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 151.0) internal successors, (453), 3 states have internal predecessors, (453), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:24:57,142 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 325.0) internal successors, (1300), 4 states have internal predecessors, (1300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:24:57,143 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 325.0) internal successors, (1300), 4 states have internal predecessors, (1300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:24:57,145 INFO L175 Difference]: Start difference. First operand has 38 places, 32 transitions, 82 flow. Second operand 3 states and 453 transitions. [2023-08-27 14:24:57,145 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 40 places, 34 transitions, 148 flow [2023-08-27 14:24:57,151 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 34 places, 34 transitions, 136 flow, removed 0 selfloop flow, removed 6 redundant places. [2023-08-27 14:24:57,152 INFO L231 Difference]: Finished difference. Result has 35 places, 34 transitions, 91 flow [2023-08-27 14:24:57,154 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=325, PETRI_DIFFERENCE_MINUEND_FLOW=70, PETRI_DIFFERENCE_MINUEND_PLACES=32, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=91, PETRI_PLACES=35, PETRI_TRANSITIONS=34} [2023-08-27 14:24:57,156 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, -3 predicate places. [2023-08-27 14:24:57,157 INFO L495 AbstractCegarLoop]: Abstraction has has 35 places, 34 transitions, 91 flow [2023-08-27 14:24:57,157 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 140.66666666666666) internal successors, (422), 3 states have internal predecessors, (422), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:24:57,157 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 14:24:57,157 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-08-27 14:24:57,157 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-27 14:24:57,158 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 15 more)] === [2023-08-27 14:24:57,158 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 14:24:57,158 INFO L85 PathProgramCache]: Analyzing trace with hash 673105, now seen corresponding path program 1 times [2023-08-27 14:24:57,158 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 14:24:57,159 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1483626230] [2023-08-27 14:24:57,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 14:24:57,159 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 14:24:57,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 14:24:57,240 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 14:24:57,240 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 14:24:57,241 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1483626230] [2023-08-27 14:24:57,241 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1483626230] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 14:24:57,241 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1322481917] [2023-08-27 14:24:57,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 14:24:57,241 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 14:24:57,241 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 14:24:57,249 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 14:24:57,275 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 14:24:57,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 14:24:57,342 INFO L262 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-27 14:24:57,345 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 14:24:57,375 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 14:24:57,376 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-27 14:24:57,376 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1322481917] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-27 14:24:57,376 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-27 14:24:57,376 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [2] total 3 [2023-08-27 14:24:57,377 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1689097878] [2023-08-27 14:24:57,377 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-27 14:24:57,377 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-27 14:24:57,378 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 14:24:57,378 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-27 14:24:57,378 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-08-27 14:24:57,379 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 140 out of 325 [2023-08-27 14:24:57,380 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 35 places, 34 transitions, 91 flow. Second operand has 4 states, 4 states have (on average 140.75) internal successors, (563), 4 states have internal predecessors, (563), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:24:57,380 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 14:24:57,380 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 140 of 325 [2023-08-27 14:24:57,380 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 14:24:57,567 INFO L124 PetriNetUnfolderBase]: 1226/1602 cut-off events. [2023-08-27 14:24:57,567 INFO L125 PetriNetUnfolderBase]: For 5/5 co-relation queries the response was YES. [2023-08-27 14:24:57,569 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3217 conditions, 1602 events. 1226/1602 cut-off events. For 5/5 co-relation queries the response was YES. Maximal size of possible extension queue 148. Compared 6138 event pairs, 578 based on Foata normal form. 0/562 useless extension candidates. Maximal degree in co-relation 3193. Up to 1569 conditions per place. [2023-08-27 14:24:57,578 INFO L140 encePairwiseOnDemand]: 321/325 looper letters, 26 selfloop transitions, 4 changer transitions 0/33 dead transitions. [2023-08-27 14:24:57,578 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 37 places, 33 transitions, 147 flow [2023-08-27 14:24:57,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-27 14:24:57,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-27 14:24:57,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 591 transitions. [2023-08-27 14:24:57,584 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4546153846153846 [2023-08-27 14:24:57,584 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 591 transitions. [2023-08-27 14:24:57,585 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 591 transitions. [2023-08-27 14:24:57,587 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 14:24:57,588 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 591 transitions. [2023-08-27 14:24:57,591 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 147.75) internal successors, (591), 4 states have internal predecessors, (591), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:24:57,594 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 325.0) internal successors, (1625), 5 states have internal predecessors, (1625), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:24:57,599 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 325.0) internal successors, (1625), 5 states have internal predecessors, (1625), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:24:57,599 INFO L175 Difference]: Start difference. First operand has 35 places, 34 transitions, 91 flow. Second operand 4 states and 591 transitions. [2023-08-27 14:24:57,600 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 37 places, 33 transitions, 147 flow [2023-08-27 14:24:57,600 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 36 places, 33 transitions, 142 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-08-27 14:24:57,601 INFO L231 Difference]: Finished difference. Result has 36 places, 33 transitions, 90 flow [2023-08-27 14:24:57,601 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=325, PETRI_DIFFERENCE_MINUEND_FLOW=82, PETRI_DIFFERENCE_MINUEND_PLACES=33, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=90, PETRI_PLACES=36, PETRI_TRANSITIONS=33} [2023-08-27 14:24:57,602 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, -2 predicate places. [2023-08-27 14:24:57,602 INFO L495 AbstractCegarLoop]: Abstraction has has 36 places, 33 transitions, 90 flow [2023-08-27 14:24:57,602 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 140.75) internal successors, (563), 4 states have internal predecessors, (563), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:24:57,602 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 14:24:57,602 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-08-27 14:24:57,612 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 14:24:57,807 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 14:24:57,808 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 15 more)] === [2023-08-27 14:24:57,808 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 14:24:57,808 INFO L85 PathProgramCache]: Analyzing trace with hash 673113, now seen corresponding path program 1 times [2023-08-27 14:24:57,808 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 14:24:57,809 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [296901240] [2023-08-27 14:24:57,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 14:24:57,809 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 14:24:57,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 14:24:57,898 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 14:24:57,898 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 14:24:57,899 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [296901240] [2023-08-27 14:24:57,899 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [296901240] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 14:24:57,899 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1060167973] [2023-08-27 14:24:57,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 14:24:57,899 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 14:24:57,899 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 14:24:57,901 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 14:24:57,904 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 14:24:57,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 14:24:57,969 INFO L262 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-27 14:24:57,970 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 14:24:57,985 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 14:24:57,986 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 14:24:57,999 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 14:24:58,000 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1060167973] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 14:24:58,000 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 14:24:58,000 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 5 [2023-08-27 14:24:58,000 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1138222348] [2023-08-27 14:24:58,001 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 14:24:58,001 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-27 14:24:58,001 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 14:24:58,001 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-27 14:24:58,001 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-08-27 14:24:58,003 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 140 out of 325 [2023-08-27 14:24:58,004 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 36 places, 33 transitions, 90 flow. Second operand has 7 states, 7 states have (on average 141.14285714285714) internal successors, (988), 7 states have internal predecessors, (988), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:24:58,004 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 14:24:58,004 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 140 of 325 [2023-08-27 14:24:58,004 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 14:24:58,200 INFO L124 PetriNetUnfolderBase]: 1229/1608 cut-off events. [2023-08-27 14:24:58,201 INFO L125 PetriNetUnfolderBase]: For 5/5 co-relation queries the response was YES. [2023-08-27 14:24:58,203 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3239 conditions, 1608 events. 1229/1608 cut-off events. For 5/5 co-relation queries the response was YES. Maximal size of possible extension queue 148. Compared 6147 event pairs, 578 based on Foata normal form. 0/570 useless extension candidates. Maximal degree in co-relation 3193. Up to 1575 conditions per place. [2023-08-27 14:24:58,212 INFO L140 encePairwiseOnDemand]: 321/325 looper letters, 27 selfloop transitions, 9 changer transitions 0/39 dead transitions. [2023-08-27 14:24:58,212 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 41 places, 39 transitions, 192 flow [2023-08-27 14:24:58,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-27 14:24:58,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-27 14:24:58,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 879 transitions. [2023-08-27 14:24:58,216 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45076923076923076 [2023-08-27 14:24:58,216 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 879 transitions. [2023-08-27 14:24:58,216 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 879 transitions. [2023-08-27 14:24:58,216 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 14:24:58,217 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 879 transitions. [2023-08-27 14:24:58,219 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 146.5) internal successors, (879), 6 states have internal predecessors, (879), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:24:58,222 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 325.0) internal successors, (2275), 7 states have internal predecessors, (2275), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:24:58,223 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 325.0) internal successors, (2275), 7 states have internal predecessors, (2275), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:24:58,223 INFO L175 Difference]: Start difference. First operand has 36 places, 33 transitions, 90 flow. Second operand 6 states and 879 transitions. [2023-08-27 14:24:58,223 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 41 places, 39 transitions, 192 flow [2023-08-27 14:24:58,224 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 39 places, 39 transitions, 183 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-27 14:24:58,225 INFO L231 Difference]: Finished difference. Result has 42 places, 39 transitions, 148 flow [2023-08-27 14:24:58,225 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=325, PETRI_DIFFERENCE_MINUEND_FLOW=84, PETRI_DIFFERENCE_MINUEND_PLACES=34, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=148, PETRI_PLACES=42, PETRI_TRANSITIONS=39} [2023-08-27 14:24:58,226 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 4 predicate places. [2023-08-27 14:24:58,226 INFO L495 AbstractCegarLoop]: Abstraction has has 42 places, 39 transitions, 148 flow [2023-08-27 14:24:58,227 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 141.14285714285714) internal successors, (988), 7 states have internal predecessors, (988), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:24:58,227 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 14:24:58,227 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-27 14:24:58,239 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 14:24:58,433 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,SelfDestructingSolverStorable2 [2023-08-27 14:24:58,433 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 15 more)] === [2023-08-27 14:24:58,434 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 14:24:58,434 INFO L85 PathProgramCache]: Analyzing trace with hash 646439431, now seen corresponding path program 1 times [2023-08-27 14:24:58,434 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 14:24:58,434 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1034027960] [2023-08-27 14:24:58,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 14:24:58,435 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 14:24:58,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 14:24:58,488 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 14:24:58,489 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 14:24:58,489 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1034027960] [2023-08-27 14:24:58,489 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1034027960] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-27 14:24:58,489 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-27 14:24:58,489 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-27 14:24:58,490 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2074282952] [2023-08-27 14:24:58,490 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-27 14:24:58,490 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-27 14:24:58,490 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 14:24:58,491 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-27 14:24:58,491 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-27 14:24:58,492 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 142 out of 325 [2023-08-27 14:24:58,493 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 39 transitions, 148 flow. Second operand has 3 states, 3 states have (on average 143.66666666666666) internal successors, (431), 3 states have internal predecessors, (431), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:24:58,493 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 14:24:58,493 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 142 of 325 [2023-08-27 14:24:58,493 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 14:24:58,731 INFO L124 PetriNetUnfolderBase]: 1340/1781 cut-off events. [2023-08-27 14:24:58,731 INFO L125 PetriNetUnfolderBase]: For 7/7 co-relation queries the response was YES. [2023-08-27 14:24:58,734 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3610 conditions, 1781 events. 1340/1781 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 168. Compared 7259 event pairs, 580 based on Foata normal form. 0/716 useless extension candidates. Maximal degree in co-relation 3574. Up to 1485 conditions per place. [2023-08-27 14:24:58,742 INFO L140 encePairwiseOnDemand]: 320/325 looper letters, 49 selfloop transitions, 3 changer transitions 0/54 dead transitions. [2023-08-27 14:24:58,743 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 54 transitions, 284 flow [2023-08-27 14:24:58,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-27 14:24:58,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-27 14:24:58,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 472 transitions. [2023-08-27 14:24:58,745 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4841025641025641 [2023-08-27 14:24:58,745 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 472 transitions. [2023-08-27 14:24:58,745 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 472 transitions. [2023-08-27 14:24:58,745 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 14:24:58,745 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 472 transitions. [2023-08-27 14:24:58,746 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 157.33333333333334) internal successors, (472), 3 states have internal predecessors, (472), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:24:58,748 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 325.0) internal successors, (1300), 4 states have internal predecessors, (1300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:24:58,749 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 325.0) internal successors, (1300), 4 states have internal predecessors, (1300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:24:58,749 INFO L175 Difference]: Start difference. First operand has 42 places, 39 transitions, 148 flow. Second operand 3 states and 472 transitions. [2023-08-27 14:24:58,749 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 54 transitions, 284 flow [2023-08-27 14:24:58,750 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 54 transitions, 263 flow, removed 9 selfloop flow, removed 1 redundant places. [2023-08-27 14:24:58,751 INFO L231 Difference]: Finished difference. Result has 44 places, 41 transitions, 148 flow [2023-08-27 14:24:58,751 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=325, PETRI_DIFFERENCE_MINUEND_FLOW=127, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=148, PETRI_PLACES=44, PETRI_TRANSITIONS=41} [2023-08-27 14:24:58,752 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 6 predicate places. [2023-08-27 14:24:58,752 INFO L495 AbstractCegarLoop]: Abstraction has has 44 places, 41 transitions, 148 flow [2023-08-27 14:24:58,752 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 143.66666666666666) internal successors, (431), 3 states have internal predecessors, (431), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:24:58,753 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 14:24:58,753 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1] [2023-08-27 14:24:58,753 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-08-27 14:24:58,753 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 15 more)] === [2023-08-27 14:24:58,753 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 14:24:58,753 INFO L85 PathProgramCache]: Analyzing trace with hash -1421070545, now seen corresponding path program 2 times [2023-08-27 14:24:58,754 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 14:24:58,754 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [823991289] [2023-08-27 14:24:58,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 14:24:58,754 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 14:24:58,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 14:24:58,853 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 14:24:58,853 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 14:24:58,854 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [823991289] [2023-08-27 14:24:58,854 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [823991289] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 14:24:58,854 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1341829026] [2023-08-27 14:24:58,854 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-27 14:24:58,854 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 14:24:58,854 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 14:24:58,857 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 14:24:58,879 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 14:24:58,928 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-08-27 14:24:58,928 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 14:24:58,929 INFO L262 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-27 14:24:58,930 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 14:24:58,944 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 14:24:58,944 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-27 14:24:58,944 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1341829026] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-27 14:24:58,944 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-27 14:24:58,944 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [5] total 6 [2023-08-27 14:24:58,945 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1089638511] [2023-08-27 14:24:58,945 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-27 14:24:58,945 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-27 14:24:58,945 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 14:24:58,945 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-27 14:24:58,946 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2023-08-27 14:24:58,946 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 141 out of 325 [2023-08-27 14:24:58,947 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 41 transitions, 148 flow. Second operand has 3 states, 3 states have (on average 142.0) internal successors, (426), 3 states have internal predecessors, (426), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:24:58,947 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 14:24:58,947 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 141 of 325 [2023-08-27 14:24:58,947 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 14:24:59,094 INFO L124 PetriNetUnfolderBase]: 1121/1500 cut-off events. [2023-08-27 14:24:59,094 INFO L125 PetriNetUnfolderBase]: For 128/183 co-relation queries the response was YES. [2023-08-27 14:24:59,096 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3478 conditions, 1500 events. 1121/1500 cut-off events. For 128/183 co-relation queries the response was YES. Maximal size of possible extension queue 136. Compared 5899 event pairs, 580 based on Foata normal form. 56/627 useless extension candidates. Maximal degree in co-relation 3451. Up to 1471 conditions per place. [2023-08-27 14:24:59,105 INFO L140 encePairwiseOnDemand]: 323/325 looper letters, 36 selfloop transitions, 1 changer transitions 0/40 dead transitions. [2023-08-27 14:24:59,105 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 40 transitions, 212 flow [2023-08-27 14:24:59,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-27 14:24:59,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-27 14:24:59,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 451 transitions. [2023-08-27 14:24:59,107 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4625641025641026 [2023-08-27 14:24:59,107 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 451 transitions. [2023-08-27 14:24:59,107 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 451 transitions. [2023-08-27 14:24:59,108 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 14:24:59,108 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 451 transitions. [2023-08-27 14:24:59,109 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 150.33333333333334) internal successors, (451), 3 states have internal predecessors, (451), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:24:59,111 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 325.0) internal successors, (1300), 4 states have internal predecessors, (1300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:24:59,112 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 325.0) internal successors, (1300), 4 states have internal predecessors, (1300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:24:59,112 INFO L175 Difference]: Start difference. First operand has 44 places, 41 transitions, 148 flow. Second operand 3 states and 451 transitions. [2023-08-27 14:24:59,112 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 40 transitions, 212 flow [2023-08-27 14:24:59,114 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 40 transitions, 191 flow, removed 3 selfloop flow, removed 5 redundant places. [2023-08-27 14:24:59,115 INFO L231 Difference]: Finished difference. Result has 40 places, 40 transitions, 119 flow [2023-08-27 14:24:59,115 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=325, PETRI_DIFFERENCE_MINUEND_FLOW=117, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=119, PETRI_PLACES=40, PETRI_TRANSITIONS=40} [2023-08-27 14:24:59,117 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 2 predicate places. [2023-08-27 14:24:59,118 INFO L495 AbstractCegarLoop]: Abstraction has has 40 places, 40 transitions, 119 flow [2023-08-27 14:24:59,118 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 142.0) internal successors, (426), 3 states have internal predecessors, (426), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:24:59,119 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 14:24:59,119 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-08-27 14:24:59,125 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 14:24:59,325 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 14:24:59,325 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 15 more)] === [2023-08-27 14:24:59,326 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 14:24:59,326 INFO L85 PathProgramCache]: Analyzing trace with hash -1435213565, now seen corresponding path program 1 times [2023-08-27 14:24:59,326 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 14:24:59,326 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [311854514] [2023-08-27 14:24:59,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 14:24:59,326 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 14:24:59,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 14:24:59,386 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 14:24:59,387 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 14:24:59,387 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [311854514] [2023-08-27 14:24:59,387 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [311854514] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-27 14:24:59,387 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-27 14:24:59,387 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-27 14:24:59,387 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [536224985] [2023-08-27 14:24:59,388 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-27 14:24:59,388 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-27 14:24:59,388 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 14:24:59,388 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-27 14:24:59,388 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-27 14:24:59,389 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 124 out of 325 [2023-08-27 14:24:59,390 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 40 places, 40 transitions, 119 flow. Second operand has 5 states, 5 states have (on average 125.2) internal successors, (626), 5 states have internal predecessors, (626), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:24:59,390 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 14:24:59,390 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 124 of 325 [2023-08-27 14:24:59,390 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 14:24:59,600 INFO L124 PetriNetUnfolderBase]: 1295/1735 cut-off events. [2023-08-27 14:24:59,600 INFO L125 PetriNetUnfolderBase]: For 172/172 co-relation queries the response was YES. [2023-08-27 14:24:59,602 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3822 conditions, 1735 events. 1295/1735 cut-off events. For 172/172 co-relation queries the response was YES. Maximal size of possible extension queue 168. Compared 7050 event pairs, 689 based on Foata normal form. 1/750 useless extension candidates. Maximal degree in co-relation 3813. Up to 1701 conditions per place. [2023-08-27 14:24:59,609 INFO L140 encePairwiseOnDemand]: 322/325 looper letters, 35 selfloop transitions, 2 changer transitions 0/39 dead transitions. [2023-08-27 14:24:59,609 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 39 transitions, 189 flow [2023-08-27 14:24:59,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-27 14:24:59,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-27 14:24:59,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 402 transitions. [2023-08-27 14:24:59,611 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4123076923076923 [2023-08-27 14:24:59,611 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 402 transitions. [2023-08-27 14:24:59,611 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 402 transitions. [2023-08-27 14:24:59,612 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 14:24:59,612 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 402 transitions. [2023-08-27 14:24:59,613 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 134.0) internal successors, (402), 3 states have internal predecessors, (402), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:24:59,614 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 325.0) internal successors, (1300), 4 states have internal predecessors, (1300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:24:59,614 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 325.0) internal successors, (1300), 4 states have internal predecessors, (1300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:24:59,615 INFO L175 Difference]: Start difference. First operand has 40 places, 40 transitions, 119 flow. Second operand 3 states and 402 transitions. [2023-08-27 14:24:59,615 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 39 transitions, 189 flow [2023-08-27 14:24:59,615 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 39 transitions, 188 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-27 14:24:59,616 INFO L231 Difference]: Finished difference. Result has 41 places, 39 transitions, 118 flow [2023-08-27 14:24:59,616 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=325, PETRI_DIFFERENCE_MINUEND_FLOW=114, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=118, PETRI_PLACES=41, PETRI_TRANSITIONS=39} [2023-08-27 14:24:59,617 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 3 predicate places. [2023-08-27 14:24:59,617 INFO L495 AbstractCegarLoop]: Abstraction has has 41 places, 39 transitions, 118 flow [2023-08-27 14:24:59,617 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 125.2) internal successors, (626), 5 states have internal predecessors, (626), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:24:59,618 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 14:24:59,618 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-08-27 14:24:59,618 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-08-27 14:24:59,618 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 15 more)] === [2023-08-27 14:24:59,618 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 14:24:59,618 INFO L85 PathProgramCache]: Analyzing trace with hash -1117655891, now seen corresponding path program 1 times [2023-08-27 14:24:59,619 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 14:24:59,619 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [638412651] [2023-08-27 14:24:59,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 14:24:59,619 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 14:24:59,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 14:24:59,659 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 14:24:59,659 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 14:24:59,659 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [638412651] [2023-08-27 14:24:59,659 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [638412651] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 14:24:59,659 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [730251084] [2023-08-27 14:24:59,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 14:24:59,660 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 14:24:59,660 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 14:24:59,661 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 14:24:59,683 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 14:24:59,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 14:24:59,739 INFO L262 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 8 conjunts are in the unsatisfiable core [2023-08-27 14:24:59,740 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 14:24:59,799 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 14:24:59,799 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 14:24:59,855 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 14:24:59,855 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [730251084] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 14:24:59,855 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 14:24:59,855 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 5, 5] total 12 [2023-08-27 14:24:59,856 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1238556285] [2023-08-27 14:24:59,856 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 14:24:59,856 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-08-27 14:24:59,856 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 14:24:59,857 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-08-27 14:24:59,857 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2023-08-27 14:24:59,859 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 124 out of 325 [2023-08-27 14:24:59,860 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 39 transitions, 118 flow. Second operand has 13 states, 13 states have (on average 125.53846153846153) internal successors, (1632), 13 states have internal predecessors, (1632), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:24:59,860 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 14:24:59,860 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 124 of 325 [2023-08-27 14:24:59,861 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 14:25:00,253 INFO L124 PetriNetUnfolderBase]: 2029/2688 cut-off events. [2023-08-27 14:25:00,253 INFO L125 PetriNetUnfolderBase]: For 190/190 co-relation queries the response was YES. [2023-08-27 14:25:00,257 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5877 conditions, 2688 events. 2029/2688 cut-off events. For 190/190 co-relation queries the response was YES. Maximal size of possible extension queue 199. Compared 11586 event pairs, 271 based on Foata normal form. 0/1328 useless extension candidates. Maximal degree in co-relation 5867. Up to 681 conditions per place. [2023-08-27 14:25:00,269 INFO L140 encePairwiseOnDemand]: 316/325 looper letters, 97 selfloop transitions, 12 changer transitions 0/111 dead transitions. [2023-08-27 14:25:00,269 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 111 transitions, 498 flow [2023-08-27 14:25:00,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-08-27 14:25:00,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-08-27 14:25:00,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1228 transitions. [2023-08-27 14:25:00,273 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4198290598290598 [2023-08-27 14:25:00,273 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1228 transitions. [2023-08-27 14:25:00,273 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1228 transitions. [2023-08-27 14:25:00,274 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 14:25:00,274 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1228 transitions. [2023-08-27 14:25:00,276 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 136.44444444444446) internal successors, (1228), 9 states have internal predecessors, (1228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:25:00,280 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 325.0) internal successors, (3250), 10 states have internal predecessors, (3250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:25:00,281 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 325.0) internal successors, (3250), 10 states have internal predecessors, (3250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:25:00,281 INFO L175 Difference]: Start difference. First operand has 41 places, 39 transitions, 118 flow. Second operand 9 states and 1228 transitions. [2023-08-27 14:25:00,281 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 111 transitions, 498 flow [2023-08-27 14:25:00,283 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 111 transitions, 494 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-27 14:25:00,284 INFO L231 Difference]: Finished difference. Result has 49 places, 42 transitions, 168 flow [2023-08-27 14:25:00,285 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=325, PETRI_DIFFERENCE_MINUEND_FLOW=110, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=168, PETRI_PLACES=49, PETRI_TRANSITIONS=42} [2023-08-27 14:25:00,285 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 11 predicate places. [2023-08-27 14:25:00,285 INFO L495 AbstractCegarLoop]: Abstraction has has 49 places, 42 transitions, 168 flow [2023-08-27 14:25:00,286 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 125.53846153846153) internal successors, (1632), 13 states have internal predecessors, (1632), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:25:00,286 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 14:25:00,286 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 14:25:00,294 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-08-27 14:25:00,492 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 14:25:00,493 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 15 more)] === [2023-08-27 14:25:00,493 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 14:25:00,493 INFO L85 PathProgramCache]: Analyzing trace with hash -282303666, now seen corresponding path program 1 times [2023-08-27 14:25:00,493 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 14:25:00,493 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1348023554] [2023-08-27 14:25:00,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 14:25:00,494 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 14:25:00,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 14:25:00,535 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 14:25:00,535 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 14:25:00,535 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1348023554] [2023-08-27 14:25:00,535 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1348023554] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-27 14:25:00,535 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-27 14:25:00,535 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-27 14:25:00,535 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [105180976] [2023-08-27 14:25:00,536 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-27 14:25:00,536 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-27 14:25:00,536 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 14:25:00,536 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-27 14:25:00,536 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-27 14:25:00,537 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 142 out of 325 [2023-08-27 14:25:00,538 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 42 transitions, 168 flow. Second operand has 3 states, 3 states have (on average 144.66666666666666) internal successors, (434), 3 states have internal predecessors, (434), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:25:00,538 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 14:25:00,538 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 142 of 325 [2023-08-27 14:25:00,538 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 14:25:00,763 INFO L124 PetriNetUnfolderBase]: 1759/2406 cut-off events. [2023-08-27 14:25:00,763 INFO L125 PetriNetUnfolderBase]: For 2541/2704 co-relation queries the response was YES. [2023-08-27 14:25:00,766 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6336 conditions, 2406 events. 1759/2406 cut-off events. For 2541/2704 co-relation queries the response was YES. Maximal size of possible extension queue 178. Compared 10670 event pairs, 821 based on Foata normal form. 143/1626 useless extension candidates. Maximal degree in co-relation 6323. Up to 2010 conditions per place. [2023-08-27 14:25:00,777 INFO L140 encePairwiseOnDemand]: 320/325 looper letters, 55 selfloop transitions, 3 changer transitions 0/61 dead transitions. [2023-08-27 14:25:00,778 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 61 transitions, 365 flow [2023-08-27 14:25:00,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-27 14:25:00,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-27 14:25:00,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 469 transitions. [2023-08-27 14:25:00,781 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48102564102564105 [2023-08-27 14:25:00,781 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 469 transitions. [2023-08-27 14:25:00,781 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 469 transitions. [2023-08-27 14:25:00,781 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 14:25:00,781 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 469 transitions. [2023-08-27 14:25:00,782 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 156.33333333333334) internal successors, (469), 3 states have internal predecessors, (469), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:25:00,784 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 325.0) internal successors, (1300), 4 states have internal predecessors, (1300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:25:00,784 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 325.0) internal successors, (1300), 4 states have internal predecessors, (1300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:25:00,784 INFO L175 Difference]: Start difference. First operand has 49 places, 42 transitions, 168 flow. Second operand 3 states and 469 transitions. [2023-08-27 14:25:00,784 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 61 transitions, 365 flow [2023-08-27 14:25:00,787 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 61 transitions, 346 flow, removed 2 selfloop flow, removed 3 redundant places. [2023-08-27 14:25:00,788 INFO L231 Difference]: Finished difference. Result has 49 places, 44 transitions, 176 flow [2023-08-27 14:25:00,788 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=325, PETRI_DIFFERENCE_MINUEND_FLOW=155, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=176, PETRI_PLACES=49, PETRI_TRANSITIONS=44} [2023-08-27 14:25:00,789 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 11 predicate places. [2023-08-27 14:25:00,789 INFO L495 AbstractCegarLoop]: Abstraction has has 49 places, 44 transitions, 176 flow [2023-08-27 14:25:00,789 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 144.66666666666666) internal successors, (434), 3 states have internal predecessors, (434), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:25:00,789 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 14:25:00,789 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1] [2023-08-27 14:25:00,789 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-08-27 14:25:00,789 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 15 more)] === [2023-08-27 14:25:00,790 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 14:25:00,790 INFO L85 PathProgramCache]: Analyzing trace with hash 136697442, now seen corresponding path program 1 times [2023-08-27 14:25:00,790 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 14:25:00,790 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1905059462] [2023-08-27 14:25:00,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 14:25:00,790 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 14:25:00,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 14:25:00,839 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 14:25:00,840 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 14:25:00,840 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1905059462] [2023-08-27 14:25:00,840 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1905059462] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 14:25:00,840 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1602725500] [2023-08-27 14:25:00,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 14:25:00,840 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 14:25:00,840 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 14:25:00,841 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 14:25:00,851 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 14:25:00,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 14:25:00,927 INFO L262 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-27 14:25:00,927 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 14:25:00,935 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 14:25:00,936 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 14:25:00,948 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 14:25:00,948 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1602725500] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 14:25:00,949 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 14:25:00,949 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2023-08-27 14:25:00,949 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1162674307] [2023-08-27 14:25:00,949 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 14:25:00,949 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-27 14:25:00,949 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 14:25:00,950 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-27 14:25:00,950 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-08-27 14:25:00,951 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 142 out of 325 [2023-08-27 14:25:00,952 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 44 transitions, 176 flow. Second operand has 7 states, 7 states have (on average 143.71428571428572) internal successors, (1006), 7 states have internal predecessors, (1006), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:25:00,952 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 14:25:00,952 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 142 of 325 [2023-08-27 14:25:00,952 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 14:25:01,327 INFO L124 PetriNetUnfolderBase]: 2569/3417 cut-off events. [2023-08-27 14:25:01,327 INFO L125 PetriNetUnfolderBase]: For 2035/2194 co-relation queries the response was YES. [2023-08-27 14:25:01,335 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10467 conditions, 3417 events. 2569/3417 cut-off events. For 2035/2194 co-relation queries the response was YES. Maximal size of possible extension queue 202. Compared 15115 event pairs, 722 based on Foata normal form. 154/2314 useless extension candidates. Maximal degree in co-relation 10453. Up to 1994 conditions per place. [2023-08-27 14:25:01,352 INFO L140 encePairwiseOnDemand]: 321/325 looper letters, 95 selfloop transitions, 13 changer transitions 0/110 dead transitions. [2023-08-27 14:25:01,352 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 110 transitions, 636 flow [2023-08-27 14:25:01,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-27 14:25:01,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-27 14:25:01,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 942 transitions. [2023-08-27 14:25:01,355 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48307692307692307 [2023-08-27 14:25:01,356 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 942 transitions. [2023-08-27 14:25:01,356 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 942 transitions. [2023-08-27 14:25:01,356 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 14:25:01,356 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 942 transitions. [2023-08-27 14:25:01,358 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 157.0) internal successors, (942), 6 states have internal predecessors, (942), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:25:01,361 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 325.0) internal successors, (2275), 7 states have internal predecessors, (2275), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:25:01,361 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 325.0) internal successors, (2275), 7 states have internal predecessors, (2275), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:25:01,361 INFO L175 Difference]: Start difference. First operand has 49 places, 44 transitions, 176 flow. Second operand 6 states and 942 transitions. [2023-08-27 14:25:01,361 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 110 transitions, 636 flow [2023-08-27 14:25:01,368 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 110 transitions, 615 flow, removed 5 selfloop flow, removed 1 redundant places. [2023-08-27 14:25:01,370 INFO L231 Difference]: Finished difference. Result has 56 places, 50 transitions, 254 flow [2023-08-27 14:25:01,370 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=325, PETRI_DIFFERENCE_MINUEND_FLOW=171, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=254, PETRI_PLACES=56, PETRI_TRANSITIONS=50} [2023-08-27 14:25:01,371 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 18 predicate places. [2023-08-27 14:25:01,371 INFO L495 AbstractCegarLoop]: Abstraction has has 56 places, 50 transitions, 254 flow [2023-08-27 14:25:01,371 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 143.71428571428572) internal successors, (1006), 7 states have internal predecessors, (1006), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:25:01,371 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 14:25:01,371 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 14:25:01,384 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 14:25:01,577 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 14:25:01,577 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 15 more)] === [2023-08-27 14:25:01,578 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 14:25:01,578 INFO L85 PathProgramCache]: Analyzing trace with hash -161477377, now seen corresponding path program 1 times [2023-08-27 14:25:01,578 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 14:25:01,578 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1908210056] [2023-08-27 14:25:01,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 14:25:01,578 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 14:25:01,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 14:25:01,630 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 14:25:01,631 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 14:25:01,631 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1908210056] [2023-08-27 14:25:01,631 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1908210056] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 14:25:01,631 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1978680952] [2023-08-27 14:25:01,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 14:25:01,631 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 14:25:01,631 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 14:25:01,632 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 14:25:01,635 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 14:25:01,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 14:25:01,714 INFO L262 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-27 14:25:01,715 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 14:25:01,727 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-27 14:25:01,728 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-27 14:25:01,728 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1978680952] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-27 14:25:01,728 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-27 14:25:01,728 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 4 [2023-08-27 14:25:01,730 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [646544414] [2023-08-27 14:25:01,730 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-27 14:25:01,730 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-27 14:25:01,730 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 14:25:01,731 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-27 14:25:01,731 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-08-27 14:25:01,732 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 142 out of 325 [2023-08-27 14:25:01,732 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 50 transitions, 254 flow. Second operand has 4 states, 4 states have (on average 144.25) internal successors, (577), 4 states have internal predecessors, (577), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:25:01,732 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 14:25:01,733 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 142 of 325 [2023-08-27 14:25:01,733 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 14:25:02,027 INFO L124 PetriNetUnfolderBase]: 2274/3007 cut-off events. [2023-08-27 14:25:02,028 INFO L125 PetriNetUnfolderBase]: For 5746/5987 co-relation queries the response was YES. [2023-08-27 14:25:02,033 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10251 conditions, 3007 events. 2274/3007 cut-off events. For 5746/5987 co-relation queries the response was YES. Maximal size of possible extension queue 174. Compared 12708 event pairs, 310 based on Foata normal form. 230/2465 useless extension candidates. Maximal degree in co-relation 10234. Up to 1260 conditions per place. [2023-08-27 14:25:02,047 INFO L140 encePairwiseOnDemand]: 321/325 looper letters, 88 selfloop transitions, 4 changer transitions 0/95 dead transitions. [2023-08-27 14:25:02,047 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 95 transitions, 734 flow [2023-08-27 14:25:02,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-27 14:25:02,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-27 14:25:02,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 621 transitions. [2023-08-27 14:25:02,049 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4776923076923077 [2023-08-27 14:25:02,049 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 621 transitions. [2023-08-27 14:25:02,049 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 621 transitions. [2023-08-27 14:25:02,050 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 14:25:02,050 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 621 transitions. [2023-08-27 14:25:02,051 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 155.25) internal successors, (621), 4 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 14:25:02,053 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 325.0) internal successors, (1625), 5 states have internal predecessors, (1625), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:25:02,053 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 325.0) internal successors, (1625), 5 states have internal predecessors, (1625), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:25:02,053 INFO L175 Difference]: Start difference. First operand has 56 places, 50 transitions, 254 flow. Second operand 4 states and 621 transitions. [2023-08-27 14:25:02,053 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 95 transitions, 734 flow [2023-08-27 14:25:02,060 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 95 transitions, 666 flow, removed 27 selfloop flow, removed 1 redundant places. [2023-08-27 14:25:02,061 INFO L231 Difference]: Finished difference. Result has 57 places, 49 transitions, 234 flow [2023-08-27 14:25:02,061 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=325, PETRI_DIFFERENCE_MINUEND_FLOW=226, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=234, PETRI_PLACES=57, PETRI_TRANSITIONS=49} [2023-08-27 14:25:02,062 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 19 predicate places. [2023-08-27 14:25:02,062 INFO L495 AbstractCegarLoop]: Abstraction has has 57 places, 49 transitions, 234 flow [2023-08-27 14:25:02,062 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 144.25) internal successors, (577), 4 states have internal predecessors, (577), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:25:02,063 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 14:25:02,063 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 14:25:02,069 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-08-27 14:25:02,268 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 14:25:02,269 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting thread2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 15 more)] === [2023-08-27 14:25:02,269 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 14:25:02,269 INFO L85 PathProgramCache]: Analyzing trace with hash -161477361, now seen corresponding path program 1 times [2023-08-27 14:25:02,269 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 14:25:02,269 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1514660683] [2023-08-27 14:25:02,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 14:25:02,269 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 14:25:02,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 14:25:02,313 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 14:25:02,313 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 14:25:02,313 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1514660683] [2023-08-27 14:25:02,313 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1514660683] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 14:25:02,313 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1565479874] [2023-08-27 14:25:02,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 14:25:02,314 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 14:25:02,314 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 14:25:02,315 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 14:25:02,324 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 14:25:02,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 14:25:02,387 INFO L262 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-27 14:25:02,388 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 14:25:02,396 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 14:25:02,396 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 14:25:02,408 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 14:25:02,408 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1565479874] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 14:25:02,408 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 14:25:02,409 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2023-08-27 14:25:02,409 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1880296500] [2023-08-27 14:25:02,409 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 14:25:02,409 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-27 14:25:02,409 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 14:25:02,410 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-27 14:25:02,410 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-08-27 14:25:02,410 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 142 out of 325 [2023-08-27 14:25:02,411 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 49 transitions, 234 flow. Second operand has 7 states, 7 states have (on average 144.0) internal successors, (1008), 7 states have internal predecessors, (1008), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:25:02,412 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 14:25:02,412 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 142 of 325 [2023-08-27 14:25:02,412 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 14:25:02,954 INFO L124 PetriNetUnfolderBase]: 3921/5062 cut-off events. [2023-08-27 14:25:02,954 INFO L125 PetriNetUnfolderBase]: For 7175/7559 co-relation queries the response was YES. [2023-08-27 14:25:02,965 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17283 conditions, 5062 events. 3921/5062 cut-off events. For 7175/7559 co-relation queries the response was YES. Maximal size of possible extension queue 245. Compared 21645 event pairs, 931 based on Foata normal form. 368/4510 useless extension candidates. Maximal degree in co-relation 17265. Up to 2803 conditions per place. [2023-08-27 14:25:02,989 INFO L140 encePairwiseOnDemand]: 321/325 looper letters, 135 selfloop transitions, 9 changer transitions 0/147 dead transitions. [2023-08-27 14:25:02,989 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 147 transitions, 1064 flow [2023-08-27 14:25:02,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-27 14:25:02,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-27 14:25:02,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 937 transitions. [2023-08-27 14:25:02,992 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4805128205128205 [2023-08-27 14:25:02,992 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 937 transitions. [2023-08-27 14:25:02,992 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 937 transitions. [2023-08-27 14:25:02,993 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 14:25:02,993 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 937 transitions. [2023-08-27 14:25:02,995 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 156.16666666666666) internal successors, (937), 6 states have internal predecessors, (937), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:25:02,997 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 325.0) internal successors, (2275), 7 states have internal predecessors, (2275), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:25:02,998 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 325.0) internal successors, (2275), 7 states have internal predecessors, (2275), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:25:02,998 INFO L175 Difference]: Start difference. First operand has 57 places, 49 transitions, 234 flow. Second operand 6 states and 937 transitions. [2023-08-27 14:25:02,998 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 147 transitions, 1064 flow [2023-08-27 14:25:03,017 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 147 transitions, 1055 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-27 14:25:03,019 INFO L231 Difference]: Finished difference. Result has 63 places, 55 transitions, 292 flow [2023-08-27 14:25:03,019 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=325, PETRI_DIFFERENCE_MINUEND_FLOW=228, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=292, PETRI_PLACES=63, PETRI_TRANSITIONS=55} [2023-08-27 14:25:03,020 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 25 predicate places. [2023-08-27 14:25:03,020 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 55 transitions, 292 flow [2023-08-27 14:25:03,020 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 144.0) internal successors, (1008), 7 states have internal predecessors, (1008), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:25:03,020 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 14:25:03,021 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 14:25:03,029 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 14:25:03,226 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 14:25:03,226 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting thread3Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 15 more)] === [2023-08-27 14:25:03,227 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 14:25:03,227 INFO L85 PathProgramCache]: Analyzing trace with hash -705967248, now seen corresponding path program 1 times [2023-08-27 14:25:03,227 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 14:25:03,227 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1179713382] [2023-08-27 14:25:03,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 14:25:03,227 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 14:25:03,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 14:25:03,309 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 14:25:03,310 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 14:25:03,310 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1179713382] [2023-08-27 14:25:03,310 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1179713382] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-27 14:25:03,310 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-27 14:25:03,310 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-27 14:25:03,310 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1504320899] [2023-08-27 14:25:03,310 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-27 14:25:03,310 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-27 14:25:03,311 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 14:25:03,311 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-27 14:25:03,311 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-27 14:25:03,311 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 137 out of 325 [2023-08-27 14:25:03,312 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 55 transitions, 292 flow. Second operand has 4 states, 4 states have (on average 139.5) internal successors, (558), 4 states have internal predecessors, (558), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:25:03,312 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 14:25:03,312 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 137 of 325 [2023-08-27 14:25:03,312 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 14:25:03,632 INFO L124 PetriNetUnfolderBase]: 2567/3405 cut-off events. [2023-08-27 14:25:03,633 INFO L125 PetriNetUnfolderBase]: For 8774/9256 co-relation queries the response was YES. [2023-08-27 14:25:03,641 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13497 conditions, 3405 events. 2567/3405 cut-off events. For 8774/9256 co-relation queries the response was YES. Maximal size of possible extension queue 141. Compared 13436 event pairs, 794 based on Foata normal form. 482/3713 useless extension candidates. Maximal degree in co-relation 13476. Up to 1916 conditions per place. [2023-08-27 14:25:03,721 INFO L140 encePairwiseOnDemand]: 321/325 looper letters, 78 selfloop transitions, 3 changer transitions 0/84 dead transitions. [2023-08-27 14:25:03,721 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 84 transitions, 648 flow [2023-08-27 14:25:03,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-27 14:25:03,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-27 14:25:03,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 585 transitions. [2023-08-27 14:25:03,723 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45 [2023-08-27 14:25:03,723 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 585 transitions. [2023-08-27 14:25:03,723 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 585 transitions. [2023-08-27 14:25:03,724 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 14:25:03,724 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 585 transitions. [2023-08-27 14:25:03,725 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 146.25) internal successors, (585), 4 states have internal predecessors, (585), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:25:03,727 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 325.0) internal successors, (1625), 5 states have internal predecessors, (1625), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:25:03,727 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 325.0) internal successors, (1625), 5 states have internal predecessors, (1625), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:25:03,727 INFO L175 Difference]: Start difference. First operand has 63 places, 55 transitions, 292 flow. Second operand 4 states and 585 transitions. [2023-08-27 14:25:03,727 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 84 transitions, 648 flow [2023-08-27 14:25:03,741 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 84 transitions, 607 flow, removed 18 selfloop flow, removed 1 redundant places. [2023-08-27 14:25:03,742 INFO L231 Difference]: Finished difference. Result has 64 places, 54 transitions, 275 flow [2023-08-27 14:25:03,742 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=325, PETRI_DIFFERENCE_MINUEND_FLOW=269, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=275, PETRI_PLACES=64, PETRI_TRANSITIONS=54} [2023-08-27 14:25:03,743 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 26 predicate places. [2023-08-27 14:25:03,743 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 54 transitions, 275 flow [2023-08-27 14:25:03,743 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 139.5) internal successors, (558), 4 states have internal predecessors, (558), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:25:03,743 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 14:25:03,744 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 14:25:03,744 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-08-27 14:25:03,744 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting thread3Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 15 more)] === [2023-08-27 14:25:03,744 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 14:25:03,744 INFO L85 PathProgramCache]: Analyzing trace with hash 1517777455, now seen corresponding path program 1 times [2023-08-27 14:25:03,744 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 14:25:03,744 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [11961785] [2023-08-27 14:25:03,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 14:25:03,745 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 14:25:03,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 14:25:03,851 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 14:25:03,852 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 14:25:03,852 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [11961785] [2023-08-27 14:25:03,852 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [11961785] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 14:25:03,852 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1526581929] [2023-08-27 14:25:03,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 14:25:03,852 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 14:25:03,852 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 14:25:03,853 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 14:25:03,857 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 14:25:03,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 14:25:03,941 INFO L262 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-27 14:25:03,942 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 14:25:03,960 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-27 14:25:03,960 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-27 14:25:03,961 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1526581929] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-27 14:25:03,961 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-27 14:25:03,961 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [4] total 5 [2023-08-27 14:25:03,961 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1831855720] [2023-08-27 14:25:03,961 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-27 14:25:03,961 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-27 14:25:03,961 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 14:25:03,962 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-27 14:25:03,962 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2023-08-27 14:25:03,963 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 140 out of 325 [2023-08-27 14:25:03,964 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 54 transitions, 275 flow. Second operand has 3 states, 3 states have (on average 143.0) internal successors, (429), 3 states have internal predecessors, (429), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:25:03,964 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 14:25:03,964 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 140 of 325 [2023-08-27 14:25:03,964 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 14:25:04,195 INFO L124 PetriNetUnfolderBase]: 2055/2691 cut-off events. [2023-08-27 14:25:04,195 INFO L125 PetriNetUnfolderBase]: For 5834/6234 co-relation queries the response was YES. [2023-08-27 14:25:04,202 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9599 conditions, 2691 events. 2055/2691 cut-off events. For 5834/6234 co-relation queries the response was YES. Maximal size of possible extension queue 126. Compared 10170 event pairs, 994 based on Foata normal form. 621/3258 useless extension candidates. Maximal degree in co-relation 9576. Up to 2669 conditions per place. [2023-08-27 14:25:04,214 INFO L140 encePairwiseOnDemand]: 322/325 looper letters, 47 selfloop transitions, 1 changer transitions 0/52 dead transitions. [2023-08-27 14:25:04,214 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 52 transitions, 351 flow [2023-08-27 14:25:04,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-27 14:25:04,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-27 14:25:04,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 444 transitions. [2023-08-27 14:25:04,216 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4553846153846154 [2023-08-27 14:25:04,216 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 444 transitions. [2023-08-27 14:25:04,216 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 444 transitions. [2023-08-27 14:25:04,217 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 14:25:04,217 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 444 transitions. [2023-08-27 14:25:04,218 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 148.0) internal successors, (444), 3 states have internal predecessors, (444), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:25:04,219 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 325.0) internal successors, (1300), 4 states have internal predecessors, (1300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:25:04,219 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 325.0) internal successors, (1300), 4 states have internal predecessors, (1300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:25:04,220 INFO L175 Difference]: Start difference. First operand has 64 places, 54 transitions, 275 flow. Second operand 3 states and 444 transitions. [2023-08-27 14:25:04,220 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 52 transitions, 351 flow [2023-08-27 14:25:04,238 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 52 transitions, 310 flow, removed 5 selfloop flow, removed 9 redundant places. [2023-08-27 14:25:04,239 INFO L231 Difference]: Finished difference. Result has 55 places, 52 transitions, 216 flow [2023-08-27 14:25:04,239 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=325, PETRI_DIFFERENCE_MINUEND_FLOW=214, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=52, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=216, PETRI_PLACES=55, PETRI_TRANSITIONS=52} [2023-08-27 14:25:04,240 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 17 predicate places. [2023-08-27 14:25:04,240 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 52 transitions, 216 flow [2023-08-27 14:25:04,240 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 143.0) internal successors, (429), 3 states have internal predecessors, (429), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:25:04,240 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 14:25:04,240 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 14:25:04,256 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-08-27 14:25:04,446 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,SelfDestructingSolverStorable12 [2023-08-27 14:25:04,446 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting thread2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 15 more)] === [2023-08-27 14:25:04,447 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 14:25:04,447 INFO L85 PathProgramCache]: Analyzing trace with hash -207501410, now seen corresponding path program 2 times [2023-08-27 14:25:04,447 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 14:25:04,447 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1246769643] [2023-08-27 14:25:04,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 14:25:04,447 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 14:25:04,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 14:25:04,534 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-27 14:25:04,535 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 14:25:04,535 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1246769643] [2023-08-27 14:25:04,535 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1246769643] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 14:25:04,535 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [547490997] [2023-08-27 14:25:04,536 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-27 14:25:04,536 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 14:25:04,536 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 14:25:04,537 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 14:25:04,559 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 14:25:04,628 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-08-27 14:25:04,628 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 14:25:04,629 INFO L262 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-27 14:25:04,630 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 14:25:04,654 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-08-27 14:25:04,654 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-27 14:25:04,654 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [547490997] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-27 14:25:04,654 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-27 14:25:04,654 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [6] total 7 [2023-08-27 14:25:04,654 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1707532395] [2023-08-27 14:25:04,655 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-27 14:25:04,655 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-27 14:25:04,655 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 14:25:04,655 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-27 14:25:04,655 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2023-08-27 14:25:04,656 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 142 out of 325 [2023-08-27 14:25:04,656 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 52 transitions, 216 flow. Second operand has 3 states, 3 states have (on average 144.66666666666666) internal successors, (434), 3 states have internal predecessors, (434), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:25:04,656 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 14:25:04,657 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 142 of 325 [2023-08-27 14:25:04,657 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 14:25:04,826 INFO L124 PetriNetUnfolderBase]: 1741/2293 cut-off events. [2023-08-27 14:25:04,827 INFO L125 PetriNetUnfolderBase]: For 2920/3174 co-relation queries the response was YES. [2023-08-27 14:25:04,831 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7052 conditions, 2293 events. 1741/2293 cut-off events. For 2920/3174 co-relation queries the response was YES. Maximal size of possible extension queue 103. Compared 8198 event pairs, 882 based on Foata normal form. 338/2491 useless extension candidates. Maximal degree in co-relation 7035. Up to 2286 conditions per place. [2023-08-27 14:25:04,840 INFO L140 encePairwiseOnDemand]: 323/325 looper letters, 47 selfloop transitions, 1 changer transitions 0/51 dead transitions. [2023-08-27 14:25:04,840 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 51 transitions, 302 flow [2023-08-27 14:25:04,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-27 14:25:04,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-27 14:25:04,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 449 transitions. [2023-08-27 14:25:04,842 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4605128205128205 [2023-08-27 14:25:04,842 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 449 transitions. [2023-08-27 14:25:04,842 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 449 transitions. [2023-08-27 14:25:04,842 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 14:25:04,842 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 449 transitions. [2023-08-27 14:25:04,843 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 149.66666666666666) internal successors, (449), 3 states have internal predecessors, (449), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:25:04,844 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 325.0) internal successors, (1300), 4 states have internal predecessors, (1300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:25:04,845 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 325.0) internal successors, (1300), 4 states have internal predecessors, (1300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:25:04,845 INFO L175 Difference]: Start difference. First operand has 55 places, 52 transitions, 216 flow. Second operand 3 states and 449 transitions. [2023-08-27 14:25:04,845 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 51 transitions, 302 flow [2023-08-27 14:25:04,857 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 51 transitions, 285 flow, removed 2 selfloop flow, removed 5 redundant places. [2023-08-27 14:25:04,858 INFO L231 Difference]: Finished difference. Result has 51 places, 51 transitions, 191 flow [2023-08-27 14:25:04,858 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=325, PETRI_DIFFERENCE_MINUEND_FLOW=189, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=191, PETRI_PLACES=51, PETRI_TRANSITIONS=51} [2023-08-27 14:25:04,858 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 13 predicate places. [2023-08-27 14:25:04,858 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 51 transitions, 191 flow [2023-08-27 14:25:04,859 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 144.66666666666666) internal successors, (434), 3 states have internal predecessors, (434), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:25:04,859 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 14:25:04,859 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 14:25:04,867 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 14:25:05,064 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,SelfDestructingSolverStorable13 [2023-08-27 14:25:05,064 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONASSERT === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 15 more)] === [2023-08-27 14:25:05,065 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 14:25:05,065 INFO L85 PathProgramCache]: Analyzing trace with hash 864075445, now seen corresponding path program 1 times [2023-08-27 14:25:05,065 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 14:25:05,065 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1622051600] [2023-08-27 14:25:05,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 14:25:05,065 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 14:25:05,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 14:25:05,163 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 14:25:05,164 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 14:25:05,164 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1622051600] [2023-08-27 14:25:05,164 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1622051600] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 14:25:05,164 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1643487456] [2023-08-27 14:25:05,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 14:25:05,164 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 14:25:05,164 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 14:25:05,165 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 14:25:05,180 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 14:25:05,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 14:25:05,289 INFO L262 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-27 14:25:05,290 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 14:25:05,318 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 14:25:05,318 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 14:25:05,356 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 14:25:05,357 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1643487456] provided 1 perfect and 1 imperfect interpolant sequences [2023-08-27 14:25:05,357 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-08-27 14:25:05,357 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 4] total 8 [2023-08-27 14:25:05,357 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1912403369] [2023-08-27 14:25:05,357 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-27 14:25:05,357 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-27 14:25:05,358 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 14:25:05,358 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-27 14:25:05,358 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2023-08-27 14:25:05,358 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 124 out of 325 [2023-08-27 14:25:05,359 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 51 transitions, 191 flow. Second operand has 5 states, 5 states have (on average 127.8) internal successors, (639), 5 states have internal predecessors, (639), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:25:05,359 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 14:25:05,359 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 124 of 325 [2023-08-27 14:25:05,359 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 14:25:05,531 INFO L124 PetriNetUnfolderBase]: 2032/2680 cut-off events. [2023-08-27 14:25:05,532 INFO L125 PetriNetUnfolderBase]: For 1905/1995 co-relation queries the response was YES. [2023-08-27 14:25:05,535 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6955 conditions, 2680 events. 2032/2680 cut-off events. For 1905/1995 co-relation queries the response was YES. Maximal size of possible extension queue 130. Compared 10394 event pairs, 837 based on Foata normal form. 190/2539 useless extension candidates. Maximal degree in co-relation 6941. Up to 2247 conditions per place. [2023-08-27 14:25:05,544 INFO L140 encePairwiseOnDemand]: 320/325 looper letters, 58 selfloop transitions, 6 changer transitions 0/66 dead transitions. [2023-08-27 14:25:05,544 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 66 transitions, 362 flow [2023-08-27 14:25:05,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-27 14:25:05,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-27 14:25:05,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 654 transitions. [2023-08-27 14:25:05,547 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4024615384615385 [2023-08-27 14:25:05,547 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 654 transitions. [2023-08-27 14:25:05,547 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 654 transitions. [2023-08-27 14:25:05,547 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 14:25:05,547 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 654 transitions. [2023-08-27 14:25:05,549 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 130.8) internal successors, (654), 5 states have internal predecessors, (654), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:25:05,551 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 325.0) internal successors, (1950), 6 states have internal predecessors, (1950), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:25:05,551 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 325.0) internal successors, (1950), 6 states have internal predecessors, (1950), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:25:05,551 INFO L175 Difference]: Start difference. First operand has 51 places, 51 transitions, 191 flow. Second operand 5 states and 654 transitions. [2023-08-27 14:25:05,551 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 66 transitions, 362 flow [2023-08-27 14:25:05,563 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 66 transitions, 361 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-27 14:25:05,564 INFO L231 Difference]: Finished difference. Result has 54 places, 49 transitions, 192 flow [2023-08-27 14:25:05,564 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=325, PETRI_DIFFERENCE_MINUEND_FLOW=180, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=192, PETRI_PLACES=54, PETRI_TRANSITIONS=49} [2023-08-27 14:25:05,565 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 16 predicate places. [2023-08-27 14:25:05,565 INFO L495 AbstractCegarLoop]: Abstraction has has 54 places, 49 transitions, 192 flow [2023-08-27 14:25:05,565 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 127.8) internal successors, (639), 5 states have internal predecessors, (639), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:25:05,565 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 14:25:05,565 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 14:25:05,574 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 14:25:05,771 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-08-27 14:25:05,771 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONASSERT === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 15 more)] === [2023-08-27 14:25:05,771 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 14:25:05,772 INFO L85 PathProgramCache]: Analyzing trace with hash -1413022366, now seen corresponding path program 1 times [2023-08-27 14:25:05,772 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 14:25:05,772 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [735606130] [2023-08-27 14:25:05,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 14:25:05,772 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 14:25:05,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 14:25:05,865 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 14:25:05,866 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 14:25:05,866 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [735606130] [2023-08-27 14:25:05,866 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [735606130] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 14:25:05,866 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1250797237] [2023-08-27 14:25:05,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 14:25:05,866 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 14:25:05,866 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 14:25:05,867 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 14:25:05,870 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 14:25:05,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 14:25:05,968 INFO L262 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 8 conjunts are in the unsatisfiable core [2023-08-27 14:25:05,970 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 14:25:06,039 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 14:25:06,039 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 14:25:06,094 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 14:25:06,094 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1250797237] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 14:25:06,094 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 14:25:06,094 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2023-08-27 14:25:06,094 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [695836488] [2023-08-27 14:25:06,095 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 14:25:06,095 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-08-27 14:25:06,095 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 14:25:06,095 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-08-27 14:25:06,096 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2023-08-27 14:25:06,097 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 116 out of 325 [2023-08-27 14:25:06,098 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 49 transitions, 192 flow. Second operand has 13 states, 13 states have (on average 118.61538461538461) internal successors, (1542), 13 states have internal predecessors, (1542), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:25:06,098 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 14:25:06,098 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 116 of 325 [2023-08-27 14:25:06,098 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 14:25:06,556 INFO L124 PetriNetUnfolderBase]: 2560/3501 cut-off events. [2023-08-27 14:25:06,556 INFO L125 PetriNetUnfolderBase]: For 2404/2569 co-relation queries the response was YES. [2023-08-27 14:25:06,560 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9385 conditions, 3501 events. 2560/3501 cut-off events. For 2404/2569 co-relation queries the response was YES. Maximal size of possible extension queue 135. Compared 14820 event pairs, 254 based on Foata normal form. 165/3481 useless extension candidates. Maximal degree in co-relation 9370. Up to 1264 conditions per place. [2023-08-27 14:25:06,571 INFO L140 encePairwiseOnDemand]: 316/325 looper letters, 171 selfloop transitions, 29 changer transitions 0/202 dead transitions. [2023-08-27 14:25:06,571 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 202 transitions, 1189 flow [2023-08-27 14:25:06,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-08-27 14:25:06,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-08-27 14:25:06,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 1614 transitions. [2023-08-27 14:25:06,577 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3820118343195266 [2023-08-27 14:25:06,577 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 1614 transitions. [2023-08-27 14:25:06,577 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 1614 transitions. [2023-08-27 14:25:06,578 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 14:25:06,578 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 1614 transitions. [2023-08-27 14:25:06,582 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 124.15384615384616) internal successors, (1614), 13 states have internal predecessors, (1614), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:25:06,587 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 325.0) internal successors, (4550), 14 states have internal predecessors, (4550), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:25:06,589 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 325.0) internal successors, (4550), 14 states have internal predecessors, (4550), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:25:06,589 INFO L175 Difference]: Start difference. First operand has 54 places, 49 transitions, 192 flow. Second operand 13 states and 1614 transitions. [2023-08-27 14:25:06,589 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 202 transitions, 1189 flow [2023-08-27 14:25:06,596 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 202 transitions, 1145 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-08-27 14:25:06,598 INFO L231 Difference]: Finished difference. Result has 67 places, 67 transitions, 332 flow [2023-08-27 14:25:06,598 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=325, PETRI_DIFFERENCE_MINUEND_FLOW=180, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=332, PETRI_PLACES=67, PETRI_TRANSITIONS=67} [2023-08-27 14:25:06,599 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 29 predicate places. [2023-08-27 14:25:06,599 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 67 transitions, 332 flow [2023-08-27 14:25:06,599 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 118.61538461538461) internal successors, (1542), 13 states have internal predecessors, (1542), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:25:06,600 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 14:25:06,600 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 14:25:06,610 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 14:25:06,810 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-08-27 14:25:06,811 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONASSERT === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 15 more)] === [2023-08-27 14:25:06,811 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 14:25:06,811 INFO L85 PathProgramCache]: Analyzing trace with hash -930950413, now seen corresponding path program 1 times [2023-08-27 14:25:06,811 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 14:25:06,811 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1338770259] [2023-08-27 14:25:06,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 14:25:06,811 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 14:25:06,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 14:25:07,882 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 14:25:07,883 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 14:25:07,883 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1338770259] [2023-08-27 14:25:07,883 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1338770259] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 14:25:07,883 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1200312886] [2023-08-27 14:25:07,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 14:25:07,883 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 14:25:07,883 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 14:25:07,884 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 14:25:07,886 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 14:25:07,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 14:25:07,991 INFO L262 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 41 conjunts are in the unsatisfiable core [2023-08-27 14:25:07,997 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 14:25:08,331 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-27 14:25:08,337 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 32 [2023-08-27 14:25:08,499 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-27 14:25:08,500 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 32 [2023-08-27 14:25:08,672 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-27 14:25:08,674 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 14:25:08,675 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 64 treesize of output 37 [2023-08-27 14:25:08,800 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 14:25:08,800 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 14:25:09,527 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 14:25:09,527 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 860 treesize of output 756 [2023-08-27 14:25:09,548 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 376 treesize of output 364 [2023-08-27 14:25:09,559 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 364 treesize of output 346 [2023-08-27 14:25:09,570 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 346 treesize of output 310 [2023-08-27 14:25:09,583 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 310 treesize of output 286 [2023-08-27 14:25:09,594 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 286 treesize of output 280 [2023-08-27 14:25:09,606 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 280 treesize of output 268 [2023-08-27 14:25:09,897 INFO L209 tifierPushTermWalker]: Run 10 iterations without descend maybe there is a nontermination bug. [2023-08-27 14:25:10,313 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 14:25:10,313 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1200312886] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 14:25:10,313 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 14:25:10,313 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 26 [2023-08-27 14:25:10,313 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1432965615] [2023-08-27 14:25:10,313 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 14:25:10,314 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2023-08-27 14:25:10,314 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 14:25:10,315 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2023-08-27 14:25:10,315 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=643, Unknown=10, NotChecked=0, Total=756 [2023-08-27 14:25:10,317 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 93 out of 325 [2023-08-27 14:25:10,318 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 67 transitions, 332 flow. Second operand has 28 states, 28 states have (on average 95.10714285714286) internal successors, (2663), 28 states have internal predecessors, (2663), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:25:10,318 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 14:25:10,319 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 93 of 325 [2023-08-27 14:25:10,319 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 14:25:16,275 INFO L124 PetriNetUnfolderBase]: 3063/4235 cut-off events. [2023-08-27 14:25:16,275 INFO L125 PetriNetUnfolderBase]: For 7717/7761 co-relation queries the response was YES. [2023-08-27 14:25:16,283 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14336 conditions, 4235 events. 3063/4235 cut-off events. For 7717/7761 co-relation queries the response was YES. Maximal size of possible extension queue 164. Compared 17973 event pairs, 586 based on Foata normal form. 46/4281 useless extension candidates. Maximal degree in co-relation 14316. Up to 3699 conditions per place. [2023-08-27 14:25:16,303 INFO L140 encePairwiseOnDemand]: 315/325 looper letters, 131 selfloop transitions, 49 changer transitions 5/187 dead transitions. [2023-08-27 14:25:16,303 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 187 transitions, 1229 flow [2023-08-27 14:25:16,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-08-27 14:25:16,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-08-27 14:25:16,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 1229 transitions. [2023-08-27 14:25:16,308 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3151282051282051 [2023-08-27 14:25:16,308 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 1229 transitions. [2023-08-27 14:25:16,308 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 1229 transitions. [2023-08-27 14:25:16,309 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 14:25:16,309 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 1229 transitions. [2023-08-27 14:25:16,312 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 102.41666666666667) internal successors, (1229), 12 states have internal predecessors, (1229), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:25:16,316 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 325.0) internal successors, (4225), 13 states have internal predecessors, (4225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:25:16,316 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 325.0) internal successors, (4225), 13 states have internal predecessors, (4225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:25:16,317 INFO L175 Difference]: Start difference. First operand has 67 places, 67 transitions, 332 flow. Second operand 12 states and 1229 transitions. [2023-08-27 14:25:16,317 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 187 transitions, 1229 flow [2023-08-27 14:25:16,364 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 187 transitions, 1119 flow, removed 25 selfloop flow, removed 5 redundant places. [2023-08-27 14:25:16,368 INFO L231 Difference]: Finished difference. Result has 80 places, 112 transitions, 653 flow [2023-08-27 14:25:16,368 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=325, PETRI_DIFFERENCE_MINUEND_FLOW=298, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=67, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=653, PETRI_PLACES=80, PETRI_TRANSITIONS=112} [2023-08-27 14:25:16,368 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 42 predicate places. [2023-08-27 14:25:16,368 INFO L495 AbstractCegarLoop]: Abstraction has has 80 places, 112 transitions, 653 flow [2023-08-27 14:25:16,369 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 95.10714285714286) internal successors, (2663), 28 states have internal predecessors, (2663), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:25:16,369 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 14:25:16,369 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 14:25:16,377 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2023-08-27 14:25:16,575 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,SelfDestructingSolverStorable16 [2023-08-27 14:25:16,575 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONASSERT === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 15 more)] === [2023-08-27 14:25:16,576 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 14:25:16,576 INFO L85 PathProgramCache]: Analyzing trace with hash -1389224335, now seen corresponding path program 2 times [2023-08-27 14:25:16,576 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 14:25:16,576 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [375980301] [2023-08-27 14:25:16,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 14:25:16,576 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 14:25:16,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 14:25:17,487 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 14:25:17,487 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 14:25:17,488 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [375980301] [2023-08-27 14:25:17,488 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [375980301] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 14:25:17,488 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [469670765] [2023-08-27 14:25:17,488 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-27 14:25:17,488 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 14:25:17,488 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 14:25:17,493 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 14:25:17,496 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 14:25:17,608 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-27 14:25:17,609 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 14:25:17,610 INFO L262 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 34 conjunts are in the unsatisfiable core [2023-08-27 14:25:17,612 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 14:25:18,091 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-27 14:25:18,094 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 14:25:18,094 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 64 treesize of output 37 [2023-08-27 14:25:18,157 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 14:25:18,158 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 14:25:18,433 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 14:25:18,433 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 125 treesize of output 69 [2023-08-27 14:25:18,800 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 14:25:18,800 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [469670765] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 14:25:18,800 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 14:25:18,800 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 7, 7] total 24 [2023-08-27 14:25:18,801 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [6016600] [2023-08-27 14:25:18,801 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 14:25:18,801 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-08-27 14:25:18,801 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 14:25:18,802 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-08-27 14:25:18,802 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=528, Unknown=0, NotChecked=0, Total=650 [2023-08-27 14:25:18,804 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 96 out of 325 [2023-08-27 14:25:18,806 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 112 transitions, 653 flow. Second operand has 26 states, 26 states have (on average 98.65384615384616) internal successors, (2565), 26 states have internal predecessors, (2565), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:25:18,806 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 14:25:18,806 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 96 of 325 [2023-08-27 14:25:18,806 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 14:25:20,351 INFO L124 PetriNetUnfolderBase]: 3223/4496 cut-off events. [2023-08-27 14:25:20,352 INFO L125 PetriNetUnfolderBase]: For 10363/10363 co-relation queries the response was YES. [2023-08-27 14:25:20,366 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16353 conditions, 4496 events. 3223/4496 cut-off events. For 10363/10363 co-relation queries the response was YES. Maximal size of possible extension queue 175. Compared 19230 event pairs, 805 based on Foata normal form. 16/4512 useless extension candidates. Maximal degree in co-relation 16326. Up to 4078 conditions per place. [2023-08-27 14:25:20,380 INFO L140 encePairwiseOnDemand]: 313/325 looper letters, 156 selfloop transitions, 77 changer transitions 7/240 dead transitions. [2023-08-27 14:25:20,380 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 100 places, 240 transitions, 1711 flow [2023-08-27 14:25:20,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-08-27 14:25:20,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2023-08-27 14:25:20,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 2172 transitions. [2023-08-27 14:25:20,388 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.31824175824175827 [2023-08-27 14:25:20,388 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 2172 transitions. [2023-08-27 14:25:20,388 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 2172 transitions. [2023-08-27 14:25:20,389 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 14:25:20,389 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 2172 transitions. [2023-08-27 14:25:20,393 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 103.42857142857143) internal successors, (2172), 21 states have internal predecessors, (2172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:25:20,401 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 325.0) internal successors, (7150), 22 states have internal predecessors, (7150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:25:20,402 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 325.0) internal successors, (7150), 22 states have internal predecessors, (7150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:25:20,402 INFO L175 Difference]: Start difference. First operand has 80 places, 112 transitions, 653 flow. Second operand 21 states and 2172 transitions. [2023-08-27 14:25:20,402 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 100 places, 240 transitions, 1711 flow [2023-08-27 14:25:20,440 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 98 places, 240 transitions, 1690 flow, removed 8 selfloop flow, removed 2 redundant places. [2023-08-27 14:25:20,443 INFO L231 Difference]: Finished difference. Result has 107 places, 165 transitions, 1229 flow [2023-08-27 14:25:20,443 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=325, PETRI_DIFFERENCE_MINUEND_FLOW=604, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=108, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=1229, PETRI_PLACES=107, PETRI_TRANSITIONS=165} [2023-08-27 14:25:20,443 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 69 predicate places. [2023-08-27 14:25:20,444 INFO L495 AbstractCegarLoop]: Abstraction has has 107 places, 165 transitions, 1229 flow [2023-08-27 14:25:20,444 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 98.65384615384616) internal successors, (2565), 26 states have internal predecessors, (2565), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:25:20,444 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 14:25:20,445 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 14:25:20,451 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 14:25:20,650 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,SelfDestructingSolverStorable17 [2023-08-27 14:25:20,651 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONASSERT === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 15 more)] === [2023-08-27 14:25:20,651 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 14:25:20,651 INFO L85 PathProgramCache]: Analyzing trace with hash -531266287, now seen corresponding path program 3 times [2023-08-27 14:25:20,651 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 14:25:20,651 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [725164551] [2023-08-27 14:25:20,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 14:25:20,651 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 14:25:20,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 14:25:21,412 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 14:25:21,412 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 14:25:21,412 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [725164551] [2023-08-27 14:25:21,412 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [725164551] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 14:25:21,413 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1260837552] [2023-08-27 14:25:21,413 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-27 14:25:21,413 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 14:25:21,413 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 14:25:21,414 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 14:25:21,416 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 14:25:21,523 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-08-27 14:25:21,523 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 14:25:21,525 INFO L262 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 32 conjunts are in the unsatisfiable core [2023-08-27 14:25:21,526 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 14:25:21,857 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-27 14:25:21,859 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 14:25:21,860 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 64 treesize of output 37 [2023-08-27 14:25:21,930 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-27 14:25:21,930 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 14:25:22,162 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 14:25:22,162 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 125 treesize of output 69 [2023-08-27 14:25:22,578 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-27 14:25:22,579 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1260837552] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 14:25:22,579 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 14:25:22,579 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 7] total 24 [2023-08-27 14:25:22,579 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1531666229] [2023-08-27 14:25:22,579 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 14:25:22,580 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-08-27 14:25:22,581 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 14:25:22,582 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-08-27 14:25:22,582 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=533, Unknown=0, NotChecked=0, Total=650 [2023-08-27 14:25:22,584 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 96 out of 325 [2023-08-27 14:25:22,586 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 107 places, 165 transitions, 1229 flow. Second operand has 26 states, 26 states have (on average 98.46153846153847) internal successors, (2560), 26 states have internal predecessors, (2560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:25:22,586 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 14:25:22,586 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 96 of 325 [2023-08-27 14:25:22,586 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 14:25:23,485 INFO L124 PetriNetUnfolderBase]: 3288/4617 cut-off events. [2023-08-27 14:25:23,485 INFO L125 PetriNetUnfolderBase]: For 14591/14591 co-relation queries the response was YES. [2023-08-27 14:25:23,501 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18350 conditions, 4617 events. 3288/4617 cut-off events. For 14591/14591 co-relation queries the response was YES. Maximal size of possible extension queue 180. Compared 20009 event pairs, 883 based on Foata normal form. 2/4619 useless extension candidates. Maximal degree in co-relation 18313. Up to 4250 conditions per place. [2023-08-27 14:25:23,517 INFO L140 encePairwiseOnDemand]: 314/325 looper letters, 149 selfloop transitions, 76 changer transitions 1/226 dead transitions. [2023-08-27 14:25:23,517 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 118 places, 226 transitions, 2014 flow [2023-08-27 14:25:23,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-08-27 14:25:23,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-08-27 14:25:23,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 1238 transitions. [2023-08-27 14:25:23,520 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.31743589743589745 [2023-08-27 14:25:23,520 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 1238 transitions. [2023-08-27 14:25:23,520 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 1238 transitions. [2023-08-27 14:25:23,521 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 14:25:23,521 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 1238 transitions. [2023-08-27 14:25:23,522 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 103.16666666666667) internal successors, (1238), 12 states have internal predecessors, (1238), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:25:23,526 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 325.0) internal successors, (4225), 13 states have internal predecessors, (4225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:25:23,527 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 325.0) internal successors, (4225), 13 states have internal predecessors, (4225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:25:23,527 INFO L175 Difference]: Start difference. First operand has 107 places, 165 transitions, 1229 flow. Second operand 12 states and 1238 transitions. [2023-08-27 14:25:23,527 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 118 places, 226 transitions, 2014 flow [2023-08-27 14:25:23,632 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 112 places, 226 transitions, 1912 flow, removed 21 selfloop flow, removed 6 redundant places. [2023-08-27 14:25:23,639 INFO L231 Difference]: Finished difference. Result has 117 places, 184 transitions, 1501 flow [2023-08-27 14:25:23,639 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=325, PETRI_DIFFERENCE_MINUEND_FLOW=1139, PETRI_DIFFERENCE_MINUEND_PLACES=101, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=165, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=98, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=1501, PETRI_PLACES=117, PETRI_TRANSITIONS=184} [2023-08-27 14:25:23,639 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 79 predicate places. [2023-08-27 14:25:23,640 INFO L495 AbstractCegarLoop]: Abstraction has has 117 places, 184 transitions, 1501 flow [2023-08-27 14:25:23,641 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 98.46153846153847) internal successors, (2560), 26 states have internal predecessors, (2560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:25:23,641 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 14:25:23,641 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 14:25:23,653 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 14:25:23,847 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 14:25:23,847 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONASSERT === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 15 more)] === [2023-08-27 14:25:23,847 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 14:25:23,847 INFO L85 PathProgramCache]: Analyzing trace with hash -940417735, now seen corresponding path program 4 times [2023-08-27 14:25:23,848 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 14:25:23,848 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [386265763] [2023-08-27 14:25:23,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 14:25:23,848 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 14:25:23,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 14:25:24,745 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 14:25:24,745 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 14:25:24,745 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [386265763] [2023-08-27 14:25:24,746 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [386265763] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 14:25:24,746 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1724902704] [2023-08-27 14:25:24,746 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-27 14:25:24,746 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 14:25:24,746 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 14:25:24,747 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 14:25:24,770 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 14:25:24,869 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-27 14:25:24,869 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 14:25:24,871 INFO L262 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 32 conjunts are in the unsatisfiable core [2023-08-27 14:25:24,873 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 14:25:25,206 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 14:25:25,207 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 61 treesize of output 39 [2023-08-27 14:25:25,493 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-27 14:25:25,493 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 14:25:25,801 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 14:25:25,802 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 125 treesize of output 69 [2023-08-27 14:25:26,206 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-27 14:25:26,207 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1724902704] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 14:25:26,207 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 14:25:26,207 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 7] total 24 [2023-08-27 14:25:26,207 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [529737264] [2023-08-27 14:25:26,207 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 14:25:26,207 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-08-27 14:25:26,208 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 14:25:26,208 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-08-27 14:25:26,208 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=539, Unknown=0, NotChecked=0, Total=650 [2023-08-27 14:25:26,210 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 96 out of 325 [2023-08-27 14:25:26,212 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 117 places, 184 transitions, 1501 flow. Second operand has 26 states, 26 states have (on average 98.65384615384616) internal successors, (2565), 26 states have internal predecessors, (2565), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:25:26,212 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 14:25:26,212 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 96 of 325 [2023-08-27 14:25:26,212 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 14:25:28,384 INFO L124 PetriNetUnfolderBase]: 3627/5118 cut-off events. [2023-08-27 14:25:28,384 INFO L125 PetriNetUnfolderBase]: For 17734/17734 co-relation queries the response was YES. [2023-08-27 14:25:28,402 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21588 conditions, 5118 events. 3627/5118 cut-off events. For 17734/17734 co-relation queries the response was YES. Maximal size of possible extension queue 205. Compared 23183 event pairs, 915 based on Foata normal form. 2/5120 useless extension candidates. Maximal degree in co-relation 21545. Up to 4414 conditions per place. [2023-08-27 14:25:28,417 INFO L140 encePairwiseOnDemand]: 314/325 looper letters, 178 selfloop transitions, 140 changer transitions 1/319 dead transitions. [2023-08-27 14:25:28,417 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 142 places, 319 transitions, 3004 flow [2023-08-27 14:25:28,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2023-08-27 14:25:28,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2023-08-27 14:25:28,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 2669 transitions. [2023-08-27 14:25:28,421 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.31585798816568045 [2023-08-27 14:25:28,421 INFO L72 ComplementDD]: Start complementDD. Operand 26 states and 2669 transitions. [2023-08-27 14:25:28,421 INFO L73 IsDeterministic]: Start isDeterministic. Operand 26 states and 2669 transitions. [2023-08-27 14:25:28,424 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 14:25:28,424 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 26 states and 2669 transitions. [2023-08-27 14:25:28,427 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 27 states, 26 states have (on average 102.65384615384616) internal successors, (2669), 26 states have internal predecessors, (2669), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:25:28,433 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 27 states, 27 states have (on average 325.0) internal successors, (8775), 27 states have internal predecessors, (8775), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:25:28,435 INFO L81 ComplementDD]: Finished complementDD. Result has 27 states, 27 states have (on average 325.0) internal successors, (8775), 27 states have internal predecessors, (8775), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:25:28,435 INFO L175 Difference]: Start difference. First operand has 117 places, 184 transitions, 1501 flow. Second operand 26 states and 2669 transitions. [2023-08-27 14:25:28,435 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 142 places, 319 transitions, 3004 flow [2023-08-27 14:25:28,515 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 139 places, 319 transitions, 2924 flow, removed 16 selfloop flow, removed 3 redundant places. [2023-08-27 14:25:28,520 INFO L231 Difference]: Finished difference. Result has 149 places, 245 transitions, 2411 flow [2023-08-27 14:25:28,520 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=325, PETRI_DIFFERENCE_MINUEND_FLOW=1441, PETRI_DIFFERENCE_MINUEND_PLACES=114, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=184, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=88, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=87, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=2411, PETRI_PLACES=149, PETRI_TRANSITIONS=245} [2023-08-27 14:25:28,520 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 111 predicate places. [2023-08-27 14:25:28,521 INFO L495 AbstractCegarLoop]: Abstraction has has 149 places, 245 transitions, 2411 flow [2023-08-27 14:25:28,521 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 98.65384615384616) internal successors, (2565), 26 states have internal predecessors, (2565), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:25:28,522 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 14:25:28,522 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 14:25:28,529 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 14:25:28,727 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 14:25:28,727 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONASSERT === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 15 more)] === [2023-08-27 14:25:28,728 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 14:25:28,728 INFO L85 PathProgramCache]: Analyzing trace with hash -778087695, now seen corresponding path program 5 times [2023-08-27 14:25:28,728 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 14:25:28,728 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1272703685] [2023-08-27 14:25:28,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 14:25:28,728 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 14:25:28,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 14:25:29,423 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 14:25:29,423 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 14:25:29,423 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1272703685] [2023-08-27 14:25:29,423 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1272703685] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 14:25:29,423 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [477855486] [2023-08-27 14:25:29,423 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-27 14:25:29,424 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 14:25:29,424 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 14:25:29,425 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 14:25:29,456 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 14:25:29,545 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-27 14:25:29,546 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 14:25:29,547 INFO L262 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 34 conjunts are in the unsatisfiable core [2023-08-27 14:25:29,548 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 14:25:29,974 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 66 treesize of output 42 [2023-08-27 14:25:30,061 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 14:25:30,061 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 14:25:30,257 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 14:25:30,257 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 117 treesize of output 69 [2023-08-27 14:25:30,870 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 14:25:30,870 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [477855486] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 14:25:30,870 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 14:25:30,870 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 7, 7] total 23 [2023-08-27 14:25:30,870 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [140464675] [2023-08-27 14:25:30,870 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 14:25:30,871 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-08-27 14:25:30,871 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 14:25:30,871 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-08-27 14:25:30,871 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=489, Unknown=0, NotChecked=0, Total=600 [2023-08-27 14:25:30,872 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 96 out of 325 [2023-08-27 14:25:30,874 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 149 places, 245 transitions, 2411 flow. Second operand has 25 states, 25 states have (on average 98.76) internal successors, (2469), 25 states have internal predecessors, (2469), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:25:30,874 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 14:25:30,874 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 96 of 325 [2023-08-27 14:25:30,874 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 14:25:32,626 INFO L124 PetriNetUnfolderBase]: 4023/5721 cut-off events. [2023-08-27 14:25:32,626 INFO L125 PetriNetUnfolderBase]: For 26605/26605 co-relation queries the response was YES. [2023-08-27 14:25:32,648 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26519 conditions, 5721 events. 4023/5721 cut-off events. For 26605/26605 co-relation queries the response was YES. Maximal size of possible extension queue 245. Compared 26740 event pairs, 1032 based on Foata normal form. 5/5726 useless extension candidates. Maximal degree in co-relation 26465. Up to 5048 conditions per place. [2023-08-27 14:25:32,663 INFO L140 encePairwiseOnDemand]: 313/325 looper letters, 228 selfloop transitions, 149 changer transitions 7/384 dead transitions. [2023-08-27 14:25:32,663 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 174 places, 384 transitions, 4111 flow [2023-08-27 14:25:32,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2023-08-27 14:25:32,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2023-08-27 14:25:32,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 2680 transitions. [2023-08-27 14:25:32,666 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.31715976331360946 [2023-08-27 14:25:32,666 INFO L72 ComplementDD]: Start complementDD. Operand 26 states and 2680 transitions. [2023-08-27 14:25:32,666 INFO L73 IsDeterministic]: Start isDeterministic. Operand 26 states and 2680 transitions. [2023-08-27 14:25:32,666 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 14:25:32,667 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 26 states and 2680 transitions. [2023-08-27 14:25:32,669 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 27 states, 26 states have (on average 103.07692307692308) internal successors, (2680), 26 states have internal predecessors, (2680), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:25:32,676 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 27 states, 27 states have (on average 325.0) internal successors, (8775), 27 states have internal predecessors, (8775), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:25:32,676 INFO L81 ComplementDD]: Finished complementDD. Result has 27 states, 27 states have (on average 325.0) internal successors, (8775), 27 states have internal predecessors, (8775), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:25:32,677 INFO L175 Difference]: Start difference. First operand has 149 places, 245 transitions, 2411 flow. Second operand 26 states and 2680 transitions. [2023-08-27 14:25:32,677 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 174 places, 384 transitions, 4111 flow [2023-08-27 14:25:32,808 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 170 places, 384 transitions, 3973 flow, removed 60 selfloop flow, removed 4 redundant places. [2023-08-27 14:25:32,817 INFO L231 Difference]: Finished difference. Result has 180 places, 298 transitions, 3221 flow [2023-08-27 14:25:32,817 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=325, PETRI_DIFFERENCE_MINUEND_FLOW=2275, PETRI_DIFFERENCE_MINUEND_PLACES=145, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=245, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=104, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=135, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=3221, PETRI_PLACES=180, PETRI_TRANSITIONS=298} [2023-08-27 14:25:32,818 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 142 predicate places. [2023-08-27 14:25:32,818 INFO L495 AbstractCegarLoop]: Abstraction has has 180 places, 298 transitions, 3221 flow [2023-08-27 14:25:32,819 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 98.76) internal successors, (2469), 25 states have internal predecessors, (2469), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:25:32,819 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 14:25:32,819 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 14:25:32,827 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2023-08-27 14:25:33,024 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 14:25:33,025 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONASSERT === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 15 more)] === [2023-08-27 14:25:33,025 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 14:25:33,025 INFO L85 PathProgramCache]: Analyzing trace with hash 168790323, now seen corresponding path program 6 times [2023-08-27 14:25:33,025 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 14:25:33,025 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1203211862] [2023-08-27 14:25:33,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 14:25:33,026 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 14:25:33,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 14:25:33,746 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 14:25:33,746 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 14:25:33,746 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1203211862] [2023-08-27 14:25:33,747 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1203211862] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 14:25:33,747 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1309358713] [2023-08-27 14:25:33,747 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-27 14:25:33,747 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 14:25:33,747 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 14:25:33,749 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 14:25:33,764 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 14:25:33,876 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2023-08-27 14:25:33,876 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 14:25:33,878 INFO L262 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 34 conjunts are in the unsatisfiable core [2023-08-27 14:25:33,879 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 14:25:34,264 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 59 treesize of output 39 [2023-08-27 14:25:34,365 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 14:25:34,365 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 14:25:34,585 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 14:25:34,585 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 101 treesize of output 69 [2023-08-27 14:25:34,911 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 14:25:34,912 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1309358713] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 14:25:34,912 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 14:25:34,912 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 7, 7] total 23 [2023-08-27 14:25:34,912 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1749799821] [2023-08-27 14:25:34,912 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 14:25:34,912 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-08-27 14:25:34,912 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 14:25:34,913 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-08-27 14:25:34,913 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=501, Unknown=0, NotChecked=0, Total=600 [2023-08-27 14:25:34,918 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 96 out of 325 [2023-08-27 14:25:34,919 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 180 places, 298 transitions, 3221 flow. Second operand has 25 states, 25 states have (on average 98.76) internal successors, (2469), 25 states have internal predecessors, (2469), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:25:34,920 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 14:25:34,920 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 96 of 325 [2023-08-27 14:25:34,920 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 14:25:36,481 INFO L124 PetriNetUnfolderBase]: 4179/5963 cut-off events. [2023-08-27 14:25:36,481 INFO L125 PetriNetUnfolderBase]: For 41283/41283 co-relation queries the response was YES. [2023-08-27 14:25:36,503 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30555 conditions, 5963 events. 4179/5963 cut-off events. For 41283/41283 co-relation queries the response was YES. Maximal size of possible extension queue 254. Compared 28367 event pairs, 1109 based on Foata normal form. 2/5965 useless extension candidates. Maximal degree in co-relation 30491. Up to 5483 conditions per place. [2023-08-27 14:25:36,516 INFO L140 encePairwiseOnDemand]: 313/325 looper letters, 227 selfloop transitions, 141 changer transitions 2/370 dead transitions. [2023-08-27 14:25:36,517 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 197 places, 370 transitions, 4552 flow [2023-08-27 14:25:36,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-08-27 14:25:36,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2023-08-27 14:25:36,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 1850 transitions. [2023-08-27 14:25:36,519 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3162393162393162 [2023-08-27 14:25:36,519 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 1850 transitions. [2023-08-27 14:25:36,519 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 1850 transitions. [2023-08-27 14:25:36,519 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 14:25:36,519 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 1850 transitions. [2023-08-27 14:25:36,521 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 102.77777777777777) internal successors, (1850), 18 states have internal predecessors, (1850), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:25:36,526 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 325.0) internal successors, (6175), 19 states have internal predecessors, (6175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:25:36,526 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 325.0) internal successors, (6175), 19 states have internal predecessors, (6175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:25:36,527 INFO L175 Difference]: Start difference. First operand has 180 places, 298 transitions, 3221 flow. Second operand 18 states and 1850 transitions. [2023-08-27 14:25:36,527 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 197 places, 370 transitions, 4552 flow [2023-08-27 14:25:36,723 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 185 places, 370 transitions, 4115 flow, removed 138 selfloop flow, removed 12 redundant places. [2023-08-27 14:25:36,728 INFO L231 Difference]: Finished difference. Result has 190 places, 325 transitions, 3503 flow [2023-08-27 14:25:36,728 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=325, PETRI_DIFFERENCE_MINUEND_FLOW=2820, PETRI_DIFFERENCE_MINUEND_PLACES=168, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=298, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=119, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=173, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=3503, PETRI_PLACES=190, PETRI_TRANSITIONS=325} [2023-08-27 14:25:36,729 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 152 predicate places. [2023-08-27 14:25:36,729 INFO L495 AbstractCegarLoop]: Abstraction has has 190 places, 325 transitions, 3503 flow [2023-08-27 14:25:36,730 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 98.76) internal successors, (2469), 25 states have internal predecessors, (2469), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:25:36,730 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 14:25:36,730 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 14:25:36,735 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 14:25:36,935 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 14:25:36,935 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONASSERT === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 15 more)] === [2023-08-27 14:25:36,936 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 14:25:36,936 INFO L85 PathProgramCache]: Analyzing trace with hash -1078881669, now seen corresponding path program 7 times [2023-08-27 14:25:36,936 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 14:25:36,936 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1600366936] [2023-08-27 14:25:36,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 14:25:36,936 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 14:25:36,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 14:25:37,589 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 14:25:37,589 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 14:25:37,590 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1600366936] [2023-08-27 14:25:37,590 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1600366936] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 14:25:37,590 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2145291610] [2023-08-27 14:25:37,590 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-27 14:25:37,590 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 14:25:37,590 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 14:25:37,591 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 14:25:37,594 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 14:25:37,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 14:25:37,709 INFO L262 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 34 conjunts are in the unsatisfiable core [2023-08-27 14:25:37,711 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 14:25:38,039 INFO L322 Elim1Store]: treesize reduction 8, result has 68.0 percent of original size [2023-08-27 14:25:38,039 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 73 treesize of output 59 [2023-08-27 14:25:38,176 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 14:25:38,177 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 14:25:38,349 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 14:25:38,349 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 117 treesize of output 69 [2023-08-27 14:25:38,711 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 14:25:38,711 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2145291610] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 14:25:38,711 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 14:25:38,711 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 7, 7] total 23 [2023-08-27 14:25:38,711 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1216703116] [2023-08-27 14:25:38,711 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 14:25:38,711 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-08-27 14:25:38,712 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 14:25:38,712 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-08-27 14:25:38,712 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=498, Unknown=0, NotChecked=0, Total=600 [2023-08-27 14:25:38,714 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 96 out of 325 [2023-08-27 14:25:38,715 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 190 places, 325 transitions, 3503 flow. Second operand has 25 states, 25 states have (on average 98.52) internal successors, (2463), 25 states have internal predecessors, (2463), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:25:38,715 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 14:25:38,715 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 96 of 325 [2023-08-27 14:25:38,715 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 14:25:40,358 INFO L124 PetriNetUnfolderBase]: 4323/6206 cut-off events. [2023-08-27 14:25:40,359 INFO L125 PetriNetUnfolderBase]: For 54563/54563 co-relation queries the response was YES. [2023-08-27 14:25:40,383 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33038 conditions, 6206 events. 4323/6206 cut-off events. For 54563/54563 co-relation queries the response was YES. Maximal size of possible extension queue 272. Compared 30121 event pairs, 1141 based on Foata normal form. 2/6206 useless extension candidates. Maximal degree in co-relation 32970. Up to 5643 conditions per place. [2023-08-27 14:25:40,399 INFO L140 encePairwiseOnDemand]: 312/325 looper letters, 256 selfloop transitions, 156 changer transitions 2/414 dead transitions. [2023-08-27 14:25:40,399 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 210 places, 414 transitions, 4975 flow [2023-08-27 14:25:40,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-08-27 14:25:40,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2023-08-27 14:25:40,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 2155 transitions. [2023-08-27 14:25:40,402 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.31575091575091574 [2023-08-27 14:25:40,402 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 2155 transitions. [2023-08-27 14:25:40,402 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 2155 transitions. [2023-08-27 14:25:40,402 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 14:25:40,402 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 2155 transitions. [2023-08-27 14:25:40,405 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 102.61904761904762) internal successors, (2155), 21 states have internal predecessors, (2155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:25:40,409 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 325.0) internal successors, (7150), 22 states have internal predecessors, (7150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:25:40,410 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 325.0) internal successors, (7150), 22 states have internal predecessors, (7150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:25:40,410 INFO L175 Difference]: Start difference. First operand has 190 places, 325 transitions, 3503 flow. Second operand 21 states and 2155 transitions. [2023-08-27 14:25:40,410 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 210 places, 414 transitions, 4975 flow [2023-08-27 14:25:40,563 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 201 places, 414 transitions, 4676 flow, removed 99 selfloop flow, removed 9 redundant places. [2023-08-27 14:25:40,567 INFO L231 Difference]: Finished difference. Result has 206 places, 358 transitions, 4007 flow [2023-08-27 14:25:40,568 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=325, PETRI_DIFFERENCE_MINUEND_FLOW=3236, PETRI_DIFFERENCE_MINUEND_PLACES=181, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=325, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=126, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=185, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=4007, PETRI_PLACES=206, PETRI_TRANSITIONS=358} [2023-08-27 14:25:40,568 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 168 predicate places. [2023-08-27 14:25:40,568 INFO L495 AbstractCegarLoop]: Abstraction has has 206 places, 358 transitions, 4007 flow [2023-08-27 14:25:40,568 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 98.52) internal successors, (2463), 25 states have internal predecessors, (2463), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:25:40,568 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 14:25:40,569 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 14:25:40,575 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 14:25:40,769 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 14:25:40,769 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONASSERT === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 15 more)] === [2023-08-27 14:25:40,769 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 14:25:40,769 INFO L85 PathProgramCache]: Analyzing trace with hash 1720826144, now seen corresponding path program 1 times [2023-08-27 14:25:40,769 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 14:25:40,770 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1311726856] [2023-08-27 14:25:40,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 14:25:40,770 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 14:25:40,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 14:25:40,888 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-27 14:25:40,888 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 14:25:40,888 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1311726856] [2023-08-27 14:25:40,888 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1311726856] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 14:25:40,888 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1753328011] [2023-08-27 14:25:40,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 14:25:40,889 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 14:25:40,889 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 14:25:40,893 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 14:25:40,897 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 14:25:41,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 14:25:41,017 INFO L262 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 9 conjunts are in the unsatisfiable core [2023-08-27 14:25:41,018 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 14:25:41,123 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-27 14:25:41,123 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 14:25:41,203 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-27 14:25:41,203 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1753328011] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 14:25:41,203 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 14:25:41,203 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 15 [2023-08-27 14:25:41,204 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1392245038] [2023-08-27 14:25:41,204 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 14:25:41,204 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-08-27 14:25:41,204 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 14:25:41,204 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-08-27 14:25:41,205 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=179, Unknown=0, NotChecked=0, Total=240 [2023-08-27 14:25:41,206 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 116 out of 325 [2023-08-27 14:25:41,207 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 206 places, 358 transitions, 4007 flow. Second operand has 16 states, 16 states have (on average 118.3125) internal successors, (1893), 16 states have internal predecessors, (1893), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:25:41,207 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 14:25:41,207 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 116 of 325 [2023-08-27 14:25:41,207 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 14:25:42,209 INFO L124 PetriNetUnfolderBase]: 4257/6141 cut-off events. [2023-08-27 14:25:42,210 INFO L125 PetriNetUnfolderBase]: For 61819/61907 co-relation queries the response was YES. [2023-08-27 14:25:42,241 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34081 conditions, 6141 events. 4257/6141 cut-off events. For 61819/61907 co-relation queries the response was YES. Maximal size of possible extension queue 292. Compared 30556 event pairs, 1429 based on Foata normal form. 99/6206 useless extension candidates. Maximal degree in co-relation 34007. Up to 3252 conditions per place. [2023-08-27 14:25:42,260 INFO L140 encePairwiseOnDemand]: 317/325 looper letters, 355 selfloop transitions, 62 changer transitions 25/458 dead transitions. [2023-08-27 14:25:42,261 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 215 places, 458 transitions, 5623 flow [2023-08-27 14:25:42,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-08-27 14:25:42,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-08-27 14:25:42,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 1256 transitions. [2023-08-27 14:25:42,263 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38646153846153847 [2023-08-27 14:25:42,264 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 1256 transitions. [2023-08-27 14:25:42,264 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 1256 transitions. [2023-08-27 14:25:42,264 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 14:25:42,264 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 1256 transitions. [2023-08-27 14:25:42,265 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 125.6) internal successors, (1256), 10 states have internal predecessors, (1256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:25:42,267 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 325.0) internal successors, (3575), 11 states have internal predecessors, (3575), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:25:42,267 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 325.0) internal successors, (3575), 11 states have internal predecessors, (3575), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:25:42,268 INFO L175 Difference]: Start difference. First operand has 206 places, 358 transitions, 4007 flow. Second operand 10 states and 1256 transitions. [2023-08-27 14:25:42,268 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 215 places, 458 transitions, 5623 flow [2023-08-27 14:25:42,453 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 202 places, 458 transitions, 5413 flow, removed 35 selfloop flow, removed 13 redundant places. [2023-08-27 14:25:42,459 INFO L231 Difference]: Finished difference. Result has 208 places, 370 transitions, 4191 flow [2023-08-27 14:25:42,459 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=325, PETRI_DIFFERENCE_MINUEND_FLOW=3797, PETRI_DIFFERENCE_MINUEND_PLACES=193, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=358, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=296, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4191, PETRI_PLACES=208, PETRI_TRANSITIONS=370} [2023-08-27 14:25:42,460 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 170 predicate places. [2023-08-27 14:25:42,460 INFO L495 AbstractCegarLoop]: Abstraction has has 208 places, 370 transitions, 4191 flow [2023-08-27 14:25:42,460 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 118.3125) internal successors, (1893), 16 states have internal predecessors, (1893), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:25:42,461 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 14:25:42,461 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 14:25:42,466 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 14:25:42,666 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 14:25:42,666 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONASSERT === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 15 more)] === [2023-08-27 14:25:42,666 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 14:25:42,666 INFO L85 PathProgramCache]: Analyzing trace with hash 1652107186, now seen corresponding path program 2 times [2023-08-27 14:25:42,666 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 14:25:42,666 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [650142128] [2023-08-27 14:25:42,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 14:25:42,667 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 14:25:42,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 14:25:42,769 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-27 14:25:42,769 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 14:25:42,769 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [650142128] [2023-08-27 14:25:42,769 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [650142128] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 14:25:42,769 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [140078120] [2023-08-27 14:25:42,770 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-27 14:25:42,770 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 14:25:42,770 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 14:25:42,773 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 14:25:42,801 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 14:25:42,919 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-27 14:25:42,919 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 14:25:42,920 INFO L262 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 12 conjunts are in the unsatisfiable core [2023-08-27 14:25:42,921 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 14:25:43,015 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-27 14:25:43,015 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 14:25:43,070 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-27 14:25:43,070 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [140078120] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 14:25:43,070 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 14:25:43,070 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5, 5] total 14 [2023-08-27 14:25:43,070 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1027617099] [2023-08-27 14:25:43,070 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 14:25:43,071 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-08-27 14:25:43,071 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 14:25:43,071 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-08-27 14:25:43,071 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2023-08-27 14:25:43,072 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 116 out of 325 [2023-08-27 14:25:43,073 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 208 places, 370 transitions, 4191 flow. Second operand has 15 states, 15 states have (on average 119.73333333333333) internal successors, (1796), 15 states have internal predecessors, (1796), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:25:43,073 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 14:25:43,073 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 116 of 325 [2023-08-27 14:25:43,073 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 14:25:43,817 INFO L124 PetriNetUnfolderBase]: 3468/5093 cut-off events. [2023-08-27 14:25:43,818 INFO L125 PetriNetUnfolderBase]: For 60424/60512 co-relation queries the response was YES. [2023-08-27 14:25:43,843 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30181 conditions, 5093 events. 3468/5093 cut-off events. For 60424/60512 co-relation queries the response was YES. Maximal size of possible extension queue 259. Compared 25410 event pairs, 1182 based on Foata normal form. 259/5326 useless extension candidates. Maximal degree in co-relation 30100. Up to 3252 conditions per place. [2023-08-27 14:25:43,856 INFO L140 encePairwiseOnDemand]: 317/325 looper letters, 314 selfloop transitions, 41 changer transitions 24/395 dead transitions. [2023-08-27 14:25:43,856 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 211 places, 395 transitions, 5024 flow [2023-08-27 14:25:43,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-08-27 14:25:43,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-08-27 14:25:43,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 999 transitions. [2023-08-27 14:25:43,858 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3842307692307692 [2023-08-27 14:25:43,858 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 999 transitions. [2023-08-27 14:25:43,858 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 999 transitions. [2023-08-27 14:25:43,858 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 14:25:43,858 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 999 transitions. [2023-08-27 14:25:43,859 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 124.875) internal successors, (999), 8 states have internal predecessors, (999), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:25:43,861 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 325.0) internal successors, (2925), 9 states have internal predecessors, (2925), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:25:43,861 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 325.0) internal successors, (2925), 9 states have internal predecessors, (2925), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:25:43,861 INFO L175 Difference]: Start difference. First operand has 208 places, 370 transitions, 4191 flow. Second operand 8 states and 999 transitions. [2023-08-27 14:25:43,861 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 211 places, 395 transitions, 5024 flow [2023-08-27 14:25:44,030 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 204 places, 395 transitions, 4975 flow, removed 21 selfloop flow, removed 7 redundant places. [2023-08-27 14:25:44,035 INFO L231 Difference]: Finished difference. Result has 204 places, 331 transitions, 3812 flow [2023-08-27 14:25:44,035 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=325, PETRI_DIFFERENCE_MINUEND_FLOW=3686, PETRI_DIFFERENCE_MINUEND_PLACES=197, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=332, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=294, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3812, PETRI_PLACES=204, PETRI_TRANSITIONS=331} [2023-08-27 14:25:44,035 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 166 predicate places. [2023-08-27 14:25:44,035 INFO L495 AbstractCegarLoop]: Abstraction has has 204 places, 331 transitions, 3812 flow [2023-08-27 14:25:44,035 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 119.73333333333333) internal successors, (1796), 15 states have internal predecessors, (1796), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:25:44,036 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 14:25:44,036 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 14:25:44,040 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 14:25:44,236 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,SelfDestructingSolverStorable24 [2023-08-27 14:25:44,236 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONASSERT === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 15 more)] === [2023-08-27 14:25:44,237 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 14:25:44,237 INFO L85 PathProgramCache]: Analyzing trace with hash 1686166737, now seen corresponding path program 8 times [2023-08-27 14:25:44,237 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 14:25:44,237 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1276636262] [2023-08-27 14:25:44,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 14:25:44,237 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 14:25:44,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 14:25:44,322 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-27 14:25:44,322 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 14:25:44,323 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1276636262] [2023-08-27 14:25:44,323 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1276636262] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 14:25:44,323 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [818083571] [2023-08-27 14:25:44,323 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-27 14:25:44,323 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 14:25:44,323 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 14:25:44,325 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 14:25:44,353 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 14:25:44,448 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-27 14:25:44,448 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 14:25:44,449 INFO L262 TraceCheckSpWp]: Trace formula consists of 237 conjuncts, 8 conjunts are in the unsatisfiable core [2023-08-27 14:25:44,450 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 14:25:44,502 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-27 14:25:44,502 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 14:25:44,561 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-27 14:25:44,561 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [818083571] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 14:25:44,561 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 14:25:44,561 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 13 [2023-08-27 14:25:44,561 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [977050586] [2023-08-27 14:25:44,562 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 14:25:44,562 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-08-27 14:25:44,562 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 14:25:44,562 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-08-27 14:25:44,562 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2023-08-27 14:25:44,563 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 124 out of 325 [2023-08-27 14:25:44,564 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 204 places, 331 transitions, 3812 flow. Second operand has 14 states, 14 states have (on average 126.57142857142857) internal successors, (1772), 14 states have internal predecessors, (1772), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:25:44,564 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 14:25:44,565 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 124 of 325 [2023-08-27 14:25:44,565 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 14:25:45,282 INFO L124 PetriNetUnfolderBase]: 3064/4477 cut-off events. [2023-08-27 14:25:45,282 INFO L125 PetriNetUnfolderBase]: For 64373/64781 co-relation queries the response was YES. [2023-08-27 14:25:45,306 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26785 conditions, 4477 events. 3064/4477 cut-off events. For 64373/64781 co-relation queries the response was YES. Maximal size of possible extension queue 250. Compared 22529 event pairs, 884 based on Foata normal form. 346/4711 useless extension candidates. Maximal degree in co-relation 26708. Up to 2040 conditions per place. [2023-08-27 14:25:45,318 INFO L140 encePairwiseOnDemand]: 319/325 looper letters, 312 selfloop transitions, 63 changer transitions 0/412 dead transitions. [2023-08-27 14:25:45,318 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 209 places, 412 transitions, 5250 flow [2023-08-27 14:25:45,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-08-27 14:25:45,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-08-27 14:25:45,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1056 transitions. [2023-08-27 14:25:45,320 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40615384615384614 [2023-08-27 14:25:45,320 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1056 transitions. [2023-08-27 14:25:45,320 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1056 transitions. [2023-08-27 14:25:45,320 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 14:25:45,320 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1056 transitions. [2023-08-27 14:25:45,321 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 132.0) internal successors, (1056), 8 states have internal predecessors, (1056), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:25:45,322 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 325.0) internal successors, (2925), 9 states have internal predecessors, (2925), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:25:45,323 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 325.0) internal successors, (2925), 9 states have internal predecessors, (2925), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:25:45,323 INFO L175 Difference]: Start difference. First operand has 204 places, 331 transitions, 3812 flow. Second operand 8 states and 1056 transitions. [2023-08-27 14:25:45,323 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 209 places, 412 transitions, 5250 flow [2023-08-27 14:25:45,433 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 202 places, 412 transitions, 5120 flow, removed 29 selfloop flow, removed 7 redundant places. [2023-08-27 14:25:45,437 INFO L231 Difference]: Finished difference. Result has 202 places, 326 transitions, 3773 flow [2023-08-27 14:25:45,438 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=325, PETRI_DIFFERENCE_MINUEND_FLOW=3647, PETRI_DIFFERENCE_MINUEND_PLACES=195, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=326, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=63, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=263, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3773, PETRI_PLACES=202, PETRI_TRANSITIONS=326} [2023-08-27 14:25:45,438 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 164 predicate places. [2023-08-27 14:25:45,438 INFO L495 AbstractCegarLoop]: Abstraction has has 202 places, 326 transitions, 3773 flow [2023-08-27 14:25:45,438 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 126.57142857142857) internal successors, (1772), 14 states have internal predecessors, (1772), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:25:45,438 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 14:25:45,439 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 14:25:45,445 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2023-08-27 14:25:45,640 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2023-08-27 14:25:45,641 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONASSERT === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 15 more)] === [2023-08-27 14:25:45,641 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 14:25:45,641 INFO L85 PathProgramCache]: Analyzing trace with hash 1028208376, now seen corresponding path program 9 times [2023-08-27 14:25:45,641 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 14:25:45,641 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [167750181] [2023-08-27 14:25:45,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 14:25:45,642 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 14:25:45,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 14:25:45,819 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-27 14:25:45,819 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 14:25:45,819 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [167750181] [2023-08-27 14:25:45,819 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [167750181] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 14:25:45,820 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [587817730] [2023-08-27 14:25:45,820 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-27 14:25:45,820 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 14:25:45,820 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 14:25:45,821 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 14:25:45,824 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 14:25:45,957 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-08-27 14:25:45,958 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 14:25:45,959 INFO L262 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 13 conjunts are in the unsatisfiable core [2023-08-27 14:25:45,960 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 14:25:46,116 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-27 14:25:46,116 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 14:25:46,190 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-27 14:25:46,191 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [587817730] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 14:25:46,191 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 14:25:46,191 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 14 [2023-08-27 14:25:46,191 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [662545014] [2023-08-27 14:25:46,191 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 14:25:46,191 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-08-27 14:25:46,191 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 14:25:46,192 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-08-27 14:25:46,192 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2023-08-27 14:25:46,193 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 120 out of 325 [2023-08-27 14:25:46,194 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 202 places, 326 transitions, 3773 flow. Second operand has 15 states, 15 states have (on average 123.26666666666667) internal successors, (1849), 15 states have internal predecessors, (1849), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:25:46,194 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 14:25:46,194 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 120 of 325 [2023-08-27 14:25:46,194 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 14:25:46,981 INFO L124 PetriNetUnfolderBase]: 2548/3769 cut-off events. [2023-08-27 14:25:46,981 INFO L125 PetriNetUnfolderBase]: For 32149/32440 co-relation queries the response was YES. [2023-08-27 14:25:47,000 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20645 conditions, 3769 events. 2548/3769 cut-off events. For 32149/32440 co-relation queries the response was YES. Maximal size of possible extension queue 210. Compared 18453 event pairs, 1014 based on Foata normal form. 258/3969 useless extension candidates. Maximal degree in co-relation 20570. Up to 2783 conditions per place. [2023-08-27 14:25:47,058 INFO L140 encePairwiseOnDemand]: 319/325 looper letters, 167 selfloop transitions, 3 changer transitions 112/297 dead transitions. [2023-08-27 14:25:47,058 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 201 places, 297 transitions, 3907 flow [2023-08-27 14:25:47,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-27 14:25:47,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-27 14:25:47,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 899 transitions. [2023-08-27 14:25:47,060 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39516483516483514 [2023-08-27 14:25:47,060 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 899 transitions. [2023-08-27 14:25:47,060 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 899 transitions. [2023-08-27 14:25:47,060 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 14:25:47,060 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 899 transitions. [2023-08-27 14:25:47,061 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 128.42857142857142) internal successors, (899), 7 states have internal predecessors, (899), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:25:47,062 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 325.0) internal successors, (2600), 8 states have internal predecessors, (2600), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:25:47,062 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 325.0) internal successors, (2600), 8 states have internal predecessors, (2600), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:25:47,062 INFO L175 Difference]: Start difference. First operand has 202 places, 326 transitions, 3773 flow. Second operand 7 states and 899 transitions. [2023-08-27 14:25:47,062 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 201 places, 297 transitions, 3907 flow [2023-08-27 14:25:47,132 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 186 places, 297 transitions, 3715 flow, removed 20 selfloop flow, removed 15 redundant places. [2023-08-27 14:25:47,135 INFO L231 Difference]: Finished difference. Result has 187 places, 185 transitions, 1947 flow [2023-08-27 14:25:47,135 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=325, PETRI_DIFFERENCE_MINUEND_FLOW=3114, PETRI_DIFFERENCE_MINUEND_PLACES=180, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=273, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=270, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1947, PETRI_PLACES=187, PETRI_TRANSITIONS=185} [2023-08-27 14:25:47,135 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 149 predicate places. [2023-08-27 14:25:47,135 INFO L495 AbstractCegarLoop]: Abstraction has has 187 places, 185 transitions, 1947 flow [2023-08-27 14:25:47,136 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 123.26666666666667) internal successors, (1849), 15 states have internal predecessors, (1849), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:25:47,136 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 14:25:47,136 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 14:25:47,141 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 14:25:47,336 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2023-08-27 14:25:47,336 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONASSERT === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 15 more)] === [2023-08-27 14:25:47,337 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 14:25:47,337 INFO L85 PathProgramCache]: Analyzing trace with hash -2096127688, now seen corresponding path program 10 times [2023-08-27 14:25:47,337 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 14:25:47,337 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1314378364] [2023-08-27 14:25:47,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 14:25:47,337 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 14:25:47,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 14:25:47,458 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-27 14:25:47,458 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 14:25:47,458 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1314378364] [2023-08-27 14:25:47,458 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1314378364] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 14:25:47,458 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1078862654] [2023-08-27 14:25:47,458 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-27 14:25:47,458 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 14:25:47,459 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 14:25:47,461 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 14:25:47,471 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 14:25:47,594 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-27 14:25:47,594 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 14:25:47,595 INFO L262 TraceCheckSpWp]: Trace formula consists of 243 conjuncts, 10 conjunts are in the unsatisfiable core [2023-08-27 14:25:47,598 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 14:25:47,717 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-27 14:25:47,717 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 14:25:47,835 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-27 14:25:47,835 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1078862654] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 14:25:47,836 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 14:25:47,836 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 19 [2023-08-27 14:25:47,836 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [916566145] [2023-08-27 14:25:47,836 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 14:25:47,836 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-08-27 14:25:47,836 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 14:25:47,837 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-08-27 14:25:47,837 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=297, Unknown=0, NotChecked=0, Total=380 [2023-08-27 14:25:47,838 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 116 out of 325 [2023-08-27 14:25:47,839 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 187 places, 185 transitions, 1947 flow. Second operand has 20 states, 20 states have (on average 118.0) internal successors, (2360), 20 states have internal predecessors, (2360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:25:47,840 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 14:25:47,840 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 116 of 325 [2023-08-27 14:25:47,840 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 14:25:48,744 INFO L124 PetriNetUnfolderBase]: 2533/3526 cut-off events. [2023-08-27 14:25:48,744 INFO L125 PetriNetUnfolderBase]: For 26908/26977 co-relation queries the response was YES. [2023-08-27 14:25:48,773 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18639 conditions, 3526 events. 2533/3526 cut-off events. For 26908/26977 co-relation queries the response was YES. Maximal size of possible extension queue 173. Compared 14681 event pairs, 864 based on Foata normal form. 79/3583 useless extension candidates. Maximal degree in co-relation 18579. Up to 2644 conditions per place. [2023-08-27 14:25:48,790 INFO L140 encePairwiseOnDemand]: 316/325 looper letters, 286 selfloop transitions, 75 changer transitions 0/370 dead transitions. [2023-08-27 14:25:48,790 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 173 places, 370 transitions, 3998 flow [2023-08-27 14:25:48,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-08-27 14:25:48,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2023-08-27 14:25:48,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 1971 transitions. [2023-08-27 14:25:48,793 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37903846153846155 [2023-08-27 14:25:48,793 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 1971 transitions. [2023-08-27 14:25:48,793 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 1971 transitions. [2023-08-27 14:25:48,794 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 14:25:48,794 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 1971 transitions. [2023-08-27 14:25:48,796 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 123.1875) internal successors, (1971), 16 states have internal predecessors, (1971), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:25:48,799 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 325.0) internal successors, (5525), 17 states have internal predecessors, (5525), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:25:48,800 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 325.0) internal successors, (5525), 17 states have internal predecessors, (5525), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:25:48,800 INFO L175 Difference]: Start difference. First operand has 187 places, 185 transitions, 1947 flow. Second operand 16 states and 1971 transitions. [2023-08-27 14:25:48,800 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 173 places, 370 transitions, 3998 flow [2023-08-27 14:25:48,864 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 155 places, 370 transitions, 3637 flow, removed 93 selfloop flow, removed 18 redundant places. [2023-08-27 14:25:48,868 INFO L231 Difference]: Finished difference. Result has 161 places, 224 transitions, 2408 flow [2023-08-27 14:25:48,868 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=325, PETRI_DIFFERENCE_MINUEND_FLOW=1731, PETRI_DIFFERENCE_MINUEND_PLACES=140, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=185, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=126, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=2408, PETRI_PLACES=161, PETRI_TRANSITIONS=224} [2023-08-27 14:25:48,868 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 123 predicate places. [2023-08-27 14:25:48,869 INFO L495 AbstractCegarLoop]: Abstraction has has 161 places, 224 transitions, 2408 flow [2023-08-27 14:25:48,869 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 118.0) internal successors, (2360), 20 states have internal predecessors, (2360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:25:48,869 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 14:25:48,869 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 14:25:48,875 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2023-08-27 14:25:49,074 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 14:25:49,074 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONASSERT === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 15 more)] === [2023-08-27 14:25:49,074 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 14:25:49,074 INFO L85 PathProgramCache]: Analyzing trace with hash -134956446, now seen corresponding path program 11 times [2023-08-27 14:25:49,074 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 14:25:49,074 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1528643773] [2023-08-27 14:25:49,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 14:25:49,075 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 14:25:49,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 14:25:49,195 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-27 14:25:49,196 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 14:25:49,196 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1528643773] [2023-08-27 14:25:49,196 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1528643773] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 14:25:49,196 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1561154332] [2023-08-27 14:25:49,196 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-27 14:25:49,196 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 14:25:49,196 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 14:25:49,201 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 14:25:49,204 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 14:25:49,338 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-27 14:25:49,338 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 14:25:49,339 INFO L262 TraceCheckSpWp]: Trace formula consists of 243 conjuncts, 8 conjunts are in the unsatisfiable core [2023-08-27 14:25:49,340 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 14:25:49,445 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-27 14:25:49,445 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 14:25:49,527 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-27 14:25:49,527 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1561154332] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 14:25:49,527 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 14:25:49,527 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 9] total 18 [2023-08-27 14:25:49,527 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [669227307] [2023-08-27 14:25:49,527 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 14:25:49,527 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-08-27 14:25:49,528 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 14:25:49,528 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-08-27 14:25:49,528 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=244, Unknown=0, NotChecked=0, Total=306 [2023-08-27 14:25:49,529 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 112 out of 325 [2023-08-27 14:25:49,530 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 161 places, 224 transitions, 2408 flow. Second operand has 18 states, 18 states have (on average 114.38888888888889) internal successors, (2059), 18 states have internal predecessors, (2059), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:25:49,530 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 14:25:49,530 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 112 of 325 [2023-08-27 14:25:49,531 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 14:25:51,135 INFO L124 PetriNetUnfolderBase]: 4226/5748 cut-off events. [2023-08-27 14:25:51,135 INFO L125 PetriNetUnfolderBase]: For 52634/52634 co-relation queries the response was YES. [2023-08-27 14:25:51,165 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30816 conditions, 5748 events. 4226/5748 cut-off events. For 52634/52634 co-relation queries the response was YES. Maximal size of possible extension queue 225. Compared 24303 event pairs, 380 based on Foata normal form. 22/5770 useless extension candidates. Maximal degree in co-relation 30760. Up to 1158 conditions per place. [2023-08-27 14:25:51,185 INFO L140 encePairwiseOnDemand]: 313/325 looper letters, 410 selfloop transitions, 341 changer transitions 0/751 dead transitions. [2023-08-27 14:25:51,185 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 207 places, 751 transitions, 7936 flow [2023-08-27 14:25:51,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2023-08-27 14:25:51,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2023-08-27 14:25:51,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 5560 transitions. [2023-08-27 14:25:51,191 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3639934533551555 [2023-08-27 14:25:51,191 INFO L72 ComplementDD]: Start complementDD. Operand 47 states and 5560 transitions. [2023-08-27 14:25:51,191 INFO L73 IsDeterministic]: Start isDeterministic. Operand 47 states and 5560 transitions. [2023-08-27 14:25:51,193 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 14:25:51,193 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 47 states and 5560 transitions. [2023-08-27 14:25:51,199 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 48 states, 47 states have (on average 118.29787234042553) internal successors, (5560), 47 states have internal predecessors, (5560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:25:51,210 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 48 states, 48 states have (on average 325.0) internal successors, (15600), 48 states have internal predecessors, (15600), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:25:51,211 INFO L81 ComplementDD]: Finished complementDD. Result has 48 states, 48 states have (on average 325.0) internal successors, (15600), 48 states have internal predecessors, (15600), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:25:51,212 INFO L175 Difference]: Start difference. First operand has 161 places, 224 transitions, 2408 flow. Second operand 47 states and 5560 transitions. [2023-08-27 14:25:51,212 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 207 places, 751 transitions, 7936 flow [2023-08-27 14:25:51,356 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 202 places, 751 transitions, 7696 flow, removed 114 selfloop flow, removed 5 redundant places. [2023-08-27 14:25:51,363 INFO L231 Difference]: Finished difference. Result has 208 places, 434 transitions, 5426 flow [2023-08-27 14:25:51,363 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=325, PETRI_DIFFERENCE_MINUEND_FLOW=2318, PETRI_DIFFERENCE_MINUEND_PLACES=156, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=224, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=152, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=47, PETRI_FLOW=5426, PETRI_PLACES=208, PETRI_TRANSITIONS=434} [2023-08-27 14:25:51,364 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 170 predicate places. [2023-08-27 14:25:51,364 INFO L495 AbstractCegarLoop]: Abstraction has has 208 places, 434 transitions, 5426 flow [2023-08-27 14:25:51,364 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 114.38888888888889) internal successors, (2059), 18 states have internal predecessors, (2059), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:25:51,364 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 14:25:51,364 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 14:25:51,369 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 14:25:51,565 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2023-08-27 14:25:51,566 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONASSERT === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 15 more)] === [2023-08-27 14:25:51,567 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 14:25:51,568 INFO L85 PathProgramCache]: Analyzing trace with hash 1537467866, now seen corresponding path program 12 times [2023-08-27 14:25:51,568 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 14:25:51,568 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [608239467] [2023-08-27 14:25:51,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 14:25:51,568 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 14:25:51,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 14:25:51,680 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-27 14:25:51,681 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 14:25:51,681 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [608239467] [2023-08-27 14:25:51,681 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [608239467] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 14:25:51,681 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1839802406] [2023-08-27 14:25:51,681 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-27 14:25:51,681 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 14:25:51,681 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 14:25:51,684 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 14:25:51,686 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 14:25:51,797 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2023-08-27 14:25:51,798 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 14:25:51,799 INFO L262 TraceCheckSpWp]: Trace formula consists of 243 conjuncts, 10 conjunts are in the unsatisfiable core [2023-08-27 14:25:51,799 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 14:25:51,905 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-27 14:25:51,905 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 14:25:51,997 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-27 14:25:51,998 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1839802406] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 14:25:51,998 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 14:25:51,998 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 17 [2023-08-27 14:25:51,998 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [927441117] [2023-08-27 14:25:51,998 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 14:25:51,998 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-08-27 14:25:51,999 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 14:25:51,999 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-08-27 14:25:51,999 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=237, Unknown=0, NotChecked=0, Total=306 [2023-08-27 14:25:52,000 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 116 out of 325 [2023-08-27 14:25:52,001 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 208 places, 434 transitions, 5426 flow. Second operand has 18 states, 18 states have (on average 118.44444444444444) internal successors, (2132), 18 states have internal predecessors, (2132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:25:52,002 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 14:25:52,002 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 116 of 325 [2023-08-27 14:25:52,002 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 14:25:52,851 INFO L124 PetriNetUnfolderBase]: 4174/5679 cut-off events. [2023-08-27 14:25:52,851 INFO L125 PetriNetUnfolderBase]: For 55401/55433 co-relation queries the response was YES. [2023-08-27 14:25:52,878 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32854 conditions, 5679 events. 4174/5679 cut-off events. For 55401/55433 co-relation queries the response was YES. Maximal size of possible extension queue 221. Compared 23927 event pairs, 1180 based on Foata normal form. 58/5730 useless extension candidates. Maximal degree in co-relation 32793. Up to 3908 conditions per place. [2023-08-27 14:25:52,896 INFO L140 encePairwiseOnDemand]: 316/325 looper letters, 381 selfloop transitions, 107 changer transitions 0/509 dead transitions. [2023-08-27 14:25:52,896 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 209 places, 509 transitions, 7019 flow [2023-08-27 14:25:52,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-08-27 14:25:52,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-08-27 14:25:52,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 1228 transitions. [2023-08-27 14:25:52,897 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37784615384615383 [2023-08-27 14:25:52,897 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 1228 transitions. [2023-08-27 14:25:52,897 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 1228 transitions. [2023-08-27 14:25:52,898 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 14:25:52,898 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 1228 transitions. [2023-08-27 14:25:52,899 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 122.8) internal successors, (1228), 10 states have internal predecessors, (1228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:25:52,902 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 325.0) internal successors, (3575), 11 states have internal predecessors, (3575), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:25:52,903 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 325.0) internal successors, (3575), 11 states have internal predecessors, (3575), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:25:52,903 INFO L175 Difference]: Start difference. First operand has 208 places, 434 transitions, 5426 flow. Second operand 10 states and 1228 transitions. [2023-08-27 14:25:52,903 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 209 places, 509 transitions, 7019 flow [2023-08-27 14:25:53,309 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 188 places, 509 transitions, 5490 flow, removed 510 selfloop flow, removed 21 redundant places. [2023-08-27 14:25:53,315 INFO L231 Difference]: Finished difference. Result has 189 places, 420 transitions, 4260 flow [2023-08-27 14:25:53,315 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=325, PETRI_DIFFERENCE_MINUEND_FLOW=3986, PETRI_DIFFERENCE_MINUEND_PLACES=179, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=418, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=105, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=311, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4260, PETRI_PLACES=189, PETRI_TRANSITIONS=420} [2023-08-27 14:25:53,315 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 151 predicate places. [2023-08-27 14:25:53,315 INFO L495 AbstractCegarLoop]: Abstraction has has 189 places, 420 transitions, 4260 flow [2023-08-27 14:25:53,316 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 118.44444444444444) internal successors, (2132), 18 states have internal predecessors, (2132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:25:53,316 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 14:25:53,316 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 14:25:53,321 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 14:25:53,516 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 14:25:53,517 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONASSERT === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 15 more)] === [2023-08-27 14:25:53,517 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 14:25:53,517 INFO L85 PathProgramCache]: Analyzing trace with hash 1382354912, now seen corresponding path program 13 times [2023-08-27 14:25:53,517 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 14:25:53,517 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1405271819] [2023-08-27 14:25:53,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 14:25:53,517 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 14:25:53,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 14:25:53,646 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-27 14:25:53,646 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 14:25:53,646 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1405271819] [2023-08-27 14:25:53,646 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1405271819] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 14:25:53,646 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [708086065] [2023-08-27 14:25:53,647 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-27 14:25:53,647 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 14:25:53,647 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 14:25:53,649 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 14:25:53,676 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 14:25:53,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 14:25:53,775 INFO L262 TraceCheckSpWp]: Trace formula consists of 243 conjuncts, 10 conjunts are in the unsatisfiable core [2023-08-27 14:25:53,776 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 14:25:53,877 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-27 14:25:53,877 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 14:25:53,983 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-27 14:25:53,984 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [708086065] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 14:25:53,984 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 14:25:53,984 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 20 [2023-08-27 14:25:53,984 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [909641474] [2023-08-27 14:25:53,984 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 14:25:53,984 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-08-27 14:25:53,984 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 14:25:53,985 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-08-27 14:25:53,985 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=332, Unknown=0, NotChecked=0, Total=420 [2023-08-27 14:25:53,986 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 116 out of 325 [2023-08-27 14:25:53,987 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 189 places, 420 transitions, 4260 flow. Second operand has 21 states, 21 states have (on average 117.85714285714286) internal successors, (2475), 21 states have internal predecessors, (2475), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:25:53,987 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 14:25:53,987 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 116 of 325 [2023-08-27 14:25:53,987 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 14:25:54,778 INFO L124 PetriNetUnfolderBase]: 4091/5568 cut-off events. [2023-08-27 14:25:54,778 INFO L125 PetriNetUnfolderBase]: For 18073/18104 co-relation queries the response was YES. [2023-08-27 14:25:54,800 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25901 conditions, 5568 events. 4091/5568 cut-off events. For 18073/18104 co-relation queries the response was YES. Maximal size of possible extension queue 217. Compared 23445 event pairs, 1328 based on Foata normal form. 48/5601 useless extension candidates. Maximal degree in co-relation 25852. Up to 4543 conditions per place. [2023-08-27 14:25:54,815 INFO L140 encePairwiseOnDemand]: 316/325 looper letters, 374 selfloop transitions, 127 changer transitions 0/522 dead transitions. [2023-08-27 14:25:54,815 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 200 places, 522 transitions, 5765 flow [2023-08-27 14:25:54,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-08-27 14:25:54,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-08-27 14:25:54,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 1597 transitions. [2023-08-27 14:25:54,817 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3779881656804734 [2023-08-27 14:25:54,817 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 1597 transitions. [2023-08-27 14:25:54,817 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 1597 transitions. [2023-08-27 14:25:54,817 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 14:25:54,817 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 1597 transitions. [2023-08-27 14:25:54,819 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 122.84615384615384) internal successors, (1597), 13 states have internal predecessors, (1597), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:25:54,820 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 325.0) internal successors, (4550), 14 states have internal predecessors, (4550), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:25:54,821 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 325.0) internal successors, (4550), 14 states have internal predecessors, (4550), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:25:54,821 INFO L175 Difference]: Start difference. First operand has 189 places, 420 transitions, 4260 flow. Second operand 13 states and 1597 transitions. [2023-08-27 14:25:54,821 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 200 places, 522 transitions, 5765 flow [2023-08-27 14:25:54,893 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 192 places, 522 transitions, 5596 flow, removed 8 selfloop flow, removed 8 redundant places. [2023-08-27 14:25:54,898 INFO L231 Difference]: Finished difference. Result has 192 places, 419 transitions, 4334 flow [2023-08-27 14:25:54,898 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=325, PETRI_DIFFERENCE_MINUEND_FLOW=4080, PETRI_DIFFERENCE_MINUEND_PLACES=180, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=419, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=127, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=292, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=4334, PETRI_PLACES=192, PETRI_TRANSITIONS=419} [2023-08-27 14:25:54,898 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 154 predicate places. [2023-08-27 14:25:54,898 INFO L495 AbstractCegarLoop]: Abstraction has has 192 places, 419 transitions, 4334 flow [2023-08-27 14:25:54,899 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 117.85714285714286) internal successors, (2475), 21 states have internal predecessors, (2475), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:25:54,899 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 14:25:54,899 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 14:25:54,904 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 14:25:55,101 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,SelfDestructingSolverStorable30 [2023-08-27 14:25:55,101 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONASSERT === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 15 more)] === [2023-08-27 14:25:55,101 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 14:25:55,101 INFO L85 PathProgramCache]: Analyzing trace with hash 1193468232, now seen corresponding path program 14 times [2023-08-27 14:25:55,102 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 14:25:55,102 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [865610179] [2023-08-27 14:25:55,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 14:25:55,102 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 14:25:55,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 14:25:55,221 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-27 14:25:55,221 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 14:25:55,221 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [865610179] [2023-08-27 14:25:55,222 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [865610179] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 14:25:55,222 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2026185491] [2023-08-27 14:25:55,222 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-27 14:25:55,222 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 14:25:55,222 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 14:25:55,225 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 14:25:55,235 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 14:25:55,365 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-27 14:25:55,365 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 14:25:55,366 INFO L262 TraceCheckSpWp]: Trace formula consists of 243 conjuncts, 10 conjunts are in the unsatisfiable core [2023-08-27 14:25:55,367 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 14:25:55,459 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-27 14:25:55,459 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 14:25:55,541 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-27 14:25:55,542 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2026185491] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 14:25:55,542 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 14:25:55,542 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 18 [2023-08-27 14:25:55,542 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1373439340] [2023-08-27 14:25:55,542 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 14:25:55,542 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-08-27 14:25:55,542 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 14:25:55,543 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-08-27 14:25:55,543 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=266, Unknown=0, NotChecked=0, Total=342 [2023-08-27 14:25:55,544 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 116 out of 325 [2023-08-27 14:25:55,545 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 192 places, 419 transitions, 4334 flow. Second operand has 19 states, 19 states have (on average 118.05263157894737) internal successors, (2243), 19 states have internal predecessors, (2243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:25:55,546 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 14:25:55,546 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 116 of 325 [2023-08-27 14:25:55,546 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 14:25:56,329 INFO L124 PetriNetUnfolderBase]: 4069/5526 cut-off events. [2023-08-27 14:25:56,329 INFO L125 PetriNetUnfolderBase]: For 17497/17531 co-relation queries the response was YES. [2023-08-27 14:25:56,349 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25961 conditions, 5526 events. 4069/5526 cut-off events. For 17497/17531 co-relation queries the response was YES. Maximal size of possible extension queue 213. Compared 23163 event pairs, 1379 based on Foata normal form. 56/5567 useless extension candidates. Maximal degree in co-relation 25913. Up to 4701 conditions per place. [2023-08-27 14:25:56,363 INFO L140 encePairwiseOnDemand]: 316/325 looper letters, 358 selfloop transitions, 103 changer transitions 0/482 dead transitions. [2023-08-27 14:25:56,363 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 199 places, 482 transitions, 5567 flow [2023-08-27 14:25:56,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-08-27 14:25:56,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-08-27 14:25:56,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 1222 transitions. [2023-08-27 14:25:56,365 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.376 [2023-08-27 14:25:56,365 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 1222 transitions. [2023-08-27 14:25:56,365 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 1222 transitions. [2023-08-27 14:25:56,366 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 14:25:56,366 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 1222 transitions. [2023-08-27 14:25:56,367 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 122.2) internal successors, (1222), 10 states have internal predecessors, (1222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:25:56,369 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 325.0) internal successors, (3575), 11 states have internal predecessors, (3575), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:25:56,369 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 325.0) internal successors, (3575), 11 states have internal predecessors, (3575), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:25:56,369 INFO L175 Difference]: Start difference. First operand has 192 places, 419 transitions, 4334 flow. Second operand 10 states and 1222 transitions. [2023-08-27 14:25:56,370 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 199 places, 482 transitions, 5567 flow [2023-08-27 14:25:56,454 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 188 places, 482 transitions, 5319 flow, removed 0 selfloop flow, removed 11 redundant places. [2023-08-27 14:25:56,459 INFO L231 Difference]: Finished difference. Result has 188 places, 416 transitions, 4259 flow [2023-08-27 14:25:56,460 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=325, PETRI_DIFFERENCE_MINUEND_FLOW=4053, PETRI_DIFFERENCE_MINUEND_PLACES=179, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=416, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=103, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=313, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4259, PETRI_PLACES=188, PETRI_TRANSITIONS=416} [2023-08-27 14:25:56,460 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 150 predicate places. [2023-08-27 14:25:56,460 INFO L495 AbstractCegarLoop]: Abstraction has has 188 places, 416 transitions, 4259 flow [2023-08-27 14:25:56,460 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 118.05263157894737) internal successors, (2243), 19 states have internal predecessors, (2243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:25:56,461 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 14:25:56,461 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 14:25:56,466 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 14:25:56,665 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 14:25:56,665 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONASSERT === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 15 more)] === [2023-08-27 14:25:56,665 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 14:25:56,665 INFO L85 PathProgramCache]: Analyzing trace with hash 832042690, now seen corresponding path program 15 times [2023-08-27 14:25:56,666 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 14:25:56,666 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1695714281] [2023-08-27 14:25:56,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 14:25:56,666 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 14:25:56,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 14:25:56,800 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-27 14:25:56,800 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 14:25:56,800 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1695714281] [2023-08-27 14:25:56,801 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1695714281] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 14:25:56,801 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [453328148] [2023-08-27 14:25:56,801 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-27 14:25:56,801 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 14:25:56,801 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 14:25:56,805 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-27 14:25:56,832 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2023-08-27 14:25:56,948 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-08-27 14:25:56,948 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 14:25:56,949 INFO L262 TraceCheckSpWp]: Trace formula consists of 243 conjuncts, 10 conjunts are in the unsatisfiable core [2023-08-27 14:25:56,950 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 14:25:57,055 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-27 14:25:57,055 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 14:25:57,164 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-27 14:25:57,164 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [453328148] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 14:25:57,165 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 14:25:57,165 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 20 [2023-08-27 14:25:57,165 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [301814595] [2023-08-27 14:25:57,165 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 14:25:57,165 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-08-27 14:25:57,165 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 14:25:57,166 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-08-27 14:25:57,166 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=331, Unknown=0, NotChecked=0, Total=420 [2023-08-27 14:25:57,167 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 116 out of 325 [2023-08-27 14:25:57,169 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 188 places, 416 transitions, 4259 flow. Second operand has 21 states, 21 states have (on average 117.95238095238095) internal successors, (2477), 21 states have internal predecessors, (2477), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:25:57,169 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 14:25:57,169 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 116 of 325 [2023-08-27 14:25:57,169 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 14:25:58,095 INFO L124 PetriNetUnfolderBase]: 4107/5573 cut-off events. [2023-08-27 14:25:58,095 INFO L125 PetriNetUnfolderBase]: For 17857/17896 co-relation queries the response was YES. [2023-08-27 14:25:58,116 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26070 conditions, 5573 events. 4107/5573 cut-off events. For 17857/17896 co-relation queries the response was YES. Maximal size of possible extension queue 219. Compared 23428 event pairs, 613 based on Foata normal form. 58/5613 useless extension candidates. Maximal degree in co-relation 26022. Up to 2156 conditions per place. [2023-08-27 14:25:58,132 INFO L140 encePairwiseOnDemand]: 316/325 looper letters, 331 selfloop transitions, 218 changer transitions 0/570 dead transitions. [2023-08-27 14:25:58,132 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 204 places, 570 transitions, 6049 flow [2023-08-27 14:25:58,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-08-27 14:25:58,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2023-08-27 14:25:58,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 2107 transitions. [2023-08-27 14:25:58,134 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3813574660633484 [2023-08-27 14:25:58,134 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 2107 transitions. [2023-08-27 14:25:58,134 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 2107 transitions. [2023-08-27 14:25:58,135 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 14:25:58,135 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 2107 transitions. [2023-08-27 14:25:58,136 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 123.94117647058823) internal successors, (2107), 17 states have internal predecessors, (2107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:25:58,139 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 325.0) internal successors, (5850), 18 states have internal predecessors, (5850), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:25:58,139 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 325.0) internal successors, (5850), 18 states have internal predecessors, (5850), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:25:58,139 INFO L175 Difference]: Start difference. First operand has 188 places, 416 transitions, 4259 flow. Second operand 17 states and 2107 transitions. [2023-08-27 14:25:58,139 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 204 places, 570 transitions, 6049 flow [2023-08-27 14:25:58,227 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 196 places, 570 transitions, 5841 flow, removed 4 selfloop flow, removed 8 redundant places. [2023-08-27 14:25:58,234 INFO L231 Difference]: Finished difference. Result has 197 places, 420 transitions, 4544 flow [2023-08-27 14:25:58,234 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=325, PETRI_DIFFERENCE_MINUEND_FLOW=4059, PETRI_DIFFERENCE_MINUEND_PLACES=180, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=416, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=214, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=202, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=4544, PETRI_PLACES=197, PETRI_TRANSITIONS=420} [2023-08-27 14:25:58,234 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 159 predicate places. [2023-08-27 14:25:58,234 INFO L495 AbstractCegarLoop]: Abstraction has has 197 places, 420 transitions, 4544 flow [2023-08-27 14:25:58,235 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 117.95238095238095) internal successors, (2477), 21 states have internal predecessors, (2477), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:25:58,235 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 14:25:58,235 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 14:25:58,241 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2023-08-27 14:25:58,440 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 14:25:58,440 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONASSERT === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 15 more)] === [2023-08-27 14:25:58,441 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 14:25:58,441 INFO L85 PathProgramCache]: Analyzing trace with hash -190872698, now seen corresponding path program 16 times [2023-08-27 14:25:58,441 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 14:25:58,441 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1805679865] [2023-08-27 14:25:58,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 14:25:58,441 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 14:25:58,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 14:25:58,546 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-27 14:25:58,547 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 14:25:58,547 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1805679865] [2023-08-27 14:25:58,547 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1805679865] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 14:25:58,547 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1532055508] [2023-08-27 14:25:58,547 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-27 14:25:58,547 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 14:25:58,547 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 14:25:58,548 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-27 14:25:58,549 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2023-08-27 14:25:58,665 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-27 14:25:58,665 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 14:25:58,666 INFO L262 TraceCheckSpWp]: Trace formula consists of 243 conjuncts, 10 conjunts are in the unsatisfiable core [2023-08-27 14:25:58,667 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 14:25:58,740 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-27 14:25:58,741 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 14:25:58,832 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-27 14:25:58,832 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1532055508] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 14:25:58,832 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 14:25:58,832 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 18 [2023-08-27 14:25:58,832 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1764966710] [2023-08-27 14:25:58,832 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 14:25:58,833 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-08-27 14:25:58,833 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 14:25:58,833 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-08-27 14:25:58,833 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=266, Unknown=0, NotChecked=0, Total=342 [2023-08-27 14:25:58,834 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 116 out of 325 [2023-08-27 14:25:58,835 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 197 places, 420 transitions, 4544 flow. Second operand has 19 states, 19 states have (on average 118.05263157894737) internal successors, (2243), 19 states have internal predecessors, (2243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:25:58,835 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 14:25:58,835 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 116 of 325 [2023-08-27 14:25:58,835 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 14:25:59,569 INFO L124 PetriNetUnfolderBase]: 4278/5806 cut-off events. [2023-08-27 14:25:59,570 INFO L125 PetriNetUnfolderBase]: For 18696/18731 co-relation queries the response was YES. [2023-08-27 14:25:59,606 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27639 conditions, 5806 events. 4278/5806 cut-off events. For 18696/18731 co-relation queries the response was YES. Maximal size of possible extension queue 218. Compared 24383 event pairs, 849 based on Foata normal form. 52/5850 useless extension candidates. Maximal degree in co-relation 27590. Up to 2858 conditions per place. [2023-08-27 14:25:59,625 INFO L140 encePairwiseOnDemand]: 316/325 looper letters, 291 selfloop transitions, 169 changer transitions 0/480 dead transitions. [2023-08-27 14:25:59,625 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 203 places, 480 transitions, 5700 flow [2023-08-27 14:25:59,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-08-27 14:25:59,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-08-27 14:25:59,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 1227 transitions. [2023-08-27 14:25:59,626 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37753846153846154 [2023-08-27 14:25:59,626 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 1227 transitions. [2023-08-27 14:25:59,626 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 1227 transitions. [2023-08-27 14:25:59,627 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 14:25:59,627 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 1227 transitions. [2023-08-27 14:25:59,628 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 122.7) internal successors, (1227), 10 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 14:25:59,629 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 325.0) internal successors, (3575), 11 states have internal predecessors, (3575), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:25:59,629 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 325.0) internal successors, (3575), 11 states have internal predecessors, (3575), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:25:59,629 INFO L175 Difference]: Start difference. First operand has 197 places, 420 transitions, 4544 flow. Second operand 10 states and 1227 transitions. [2023-08-27 14:25:59,629 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 203 places, 480 transitions, 5700 flow [2023-08-27 14:25:59,718 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 188 places, 480 transitions, 5272 flow, removed 0 selfloop flow, removed 15 redundant places. [2023-08-27 14:25:59,723 INFO L231 Difference]: Finished difference. Result has 188 places, 411 transitions, 4373 flow [2023-08-27 14:25:59,723 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=325, PETRI_DIFFERENCE_MINUEND_FLOW=4035, PETRI_DIFFERENCE_MINUEND_PLACES=179, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=411, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=169, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=242, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4373, PETRI_PLACES=188, PETRI_TRANSITIONS=411} [2023-08-27 14:25:59,724 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 150 predicate places. [2023-08-27 14:25:59,724 INFO L495 AbstractCegarLoop]: Abstraction has has 188 places, 411 transitions, 4373 flow [2023-08-27 14:25:59,724 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 118.05263157894737) internal successors, (2243), 19 states have internal predecessors, (2243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:25:59,724 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 14:25:59,724 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 14:25:59,729 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2023-08-27 14:25:59,924 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 14:25:59,925 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONASSERT === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 15 more)] === [2023-08-27 14:25:59,925 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 14:25:59,925 INFO L85 PathProgramCache]: Analyzing trace with hash -520896186, now seen corresponding path program 17 times [2023-08-27 14:25:59,925 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 14:25:59,925 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1942764449] [2023-08-27 14:25:59,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 14:25:59,925 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 14:25:59,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 14:26:00,036 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-27 14:26:00,036 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 14:26:00,036 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1942764449] [2023-08-27 14:26:00,036 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1942764449] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 14:26:00,036 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [89881688] [2023-08-27 14:26:00,036 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-27 14:26:00,037 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 14:26:00,037 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 14:26:00,041 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-27 14:26:00,052 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2023-08-27 14:26:00,193 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-27 14:26:00,193 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 14:26:00,194 INFO L262 TraceCheckSpWp]: Trace formula consists of 243 conjuncts, 8 conjunts are in the unsatisfiable core [2023-08-27 14:26:00,195 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 14:26:00,300 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-27 14:26:00,300 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 14:26:00,389 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-27 14:26:00,389 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [89881688] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 14:26:00,389 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 14:26:00,389 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 9] total 17 [2023-08-27 14:26:00,389 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1084934968] [2023-08-27 14:26:00,389 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 14:26:00,390 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-08-27 14:26:00,390 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 14:26:00,390 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-08-27 14:26:00,390 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2023-08-27 14:26:00,391 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 112 out of 325 [2023-08-27 14:26:00,392 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 188 places, 411 transitions, 4373 flow. Second operand has 17 states, 17 states have (on average 114.52941176470588) internal successors, (1947), 17 states have internal predecessors, (1947), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:26:00,393 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 14:26:00,393 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 112 of 325 [2023-08-27 14:26:00,393 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 14:26:01,439 INFO L124 PetriNetUnfolderBase]: 4303/5827 cut-off events. [2023-08-27 14:26:01,439 INFO L125 PetriNetUnfolderBase]: For 19008/19008 co-relation queries the response was YES. [2023-08-27 14:26:01,460 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27392 conditions, 5827 events. 4303/5827 cut-off events. For 19008/19008 co-relation queries the response was YES. Maximal size of possible extension queue 212. Compared 24206 event pairs, 934 based on Foata normal form. 22/5849 useless extension candidates. Maximal degree in co-relation 27344. Up to 2465 conditions per place. [2023-08-27 14:26:01,473 INFO L140 encePairwiseOnDemand]: 313/325 looper letters, 302 selfloop transitions, 228 changer transitions 0/530 dead transitions. [2023-08-27 14:26:01,473 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 207 places, 530 transitions, 6138 flow [2023-08-27 14:26:01,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-08-27 14:26:01,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2023-08-27 14:26:01,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 2361 transitions. [2023-08-27 14:26:01,475 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36323076923076925 [2023-08-27 14:26:01,476 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 2361 transitions. [2023-08-27 14:26:01,476 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 2361 transitions. [2023-08-27 14:26:01,477 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 14:26:01,477 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 2361 transitions. [2023-08-27 14:26:01,479 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 21 states, 20 states have (on average 118.05) internal successors, (2361), 20 states have internal predecessors, (2361), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:26:01,483 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 21 states, 21 states have (on average 325.0) internal successors, (6825), 21 states have internal predecessors, (6825), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:26:01,483 INFO L81 ComplementDD]: Finished complementDD. Result has 21 states, 21 states have (on average 325.0) internal successors, (6825), 21 states have internal predecessors, (6825), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:26:01,483 INFO L175 Difference]: Start difference. First operand has 188 places, 411 transitions, 4373 flow. Second operand 20 states and 2361 transitions. [2023-08-27 14:26:01,483 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 207 places, 530 transitions, 6138 flow [2023-08-27 14:26:01,570 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 199 places, 530 transitions, 5820 flow, removed 0 selfloop flow, removed 8 redundant places. [2023-08-27 14:26:01,575 INFO L231 Difference]: Finished difference. Result has 202 places, 416 transitions, 4575 flow [2023-08-27 14:26:01,575 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=325, PETRI_DIFFERENCE_MINUEND_FLOW=4055, PETRI_DIFFERENCE_MINUEND_PLACES=180, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=411, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=223, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=188, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=4575, PETRI_PLACES=202, PETRI_TRANSITIONS=416} [2023-08-27 14:26:01,576 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 164 predicate places. [2023-08-27 14:26:01,576 INFO L495 AbstractCegarLoop]: Abstraction has has 202 places, 416 transitions, 4575 flow [2023-08-27 14:26:01,576 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 114.52941176470588) internal successors, (1947), 17 states have internal predecessors, (1947), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:26:01,576 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 14:26:01,576 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 14:26:01,581 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2023-08-27 14:26:01,776 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2023-08-27 14:26:01,777 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONASSERT === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 15 more)] === [2023-08-27 14:26:01,777 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 14:26:01,777 INFO L85 PathProgramCache]: Analyzing trace with hash -386587143, now seen corresponding path program 3 times [2023-08-27 14:26:01,777 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 14:26:01,777 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [107188981] [2023-08-27 14:26:01,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 14:26:01,778 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 14:26:01,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 14:26:02,870 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 14:26:02,870 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 14:26:02,870 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [107188981] [2023-08-27 14:26:02,870 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [107188981] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 14:26:02,870 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [679309778] [2023-08-27 14:26:02,870 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-27 14:26:02,870 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 14:26:02,870 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 14:26:02,871 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-27 14:26:02,873 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2023-08-27 14:26:02,995 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-08-27 14:26:02,996 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 14:26:02,997 INFO L262 TraceCheckSpWp]: Trace formula consists of 249 conjuncts, 51 conjunts are in the unsatisfiable core [2023-08-27 14:26:02,998 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 14:26:03,764 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-27 14:26:03,765 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 117 treesize of output 93 [2023-08-27 14:26:04,094 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 14:26:04,094 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 147 treesize of output 89 [2023-08-27 14:26:04,935 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 14:26:04,935 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 14:26:08,840 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 14:26:08,841 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 15 select indices, 15 select index equivalence classes, 0 disjoint index pairs (out of 105 index pairs), introduced 15 new quantified variables, introduced 105 case distinctions, treesize of input 1161 treesize of output 1615 [2023-08-27 14:26:09,013 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 735 treesize of output 729 [2023-08-27 14:26:09,229 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 729 treesize of output 717 [2023-08-27 14:26:09,455 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 717 treesize of output 711 [2023-08-27 14:26:09,653 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 711 treesize of output 693 [2023-08-27 14:26:09,849 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 693 treesize of output 675 [2023-08-27 14:26:10,036 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 675 treesize of output 669 [2023-08-27 14:26:10,176 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 669 treesize of output 657 [2023-08-27 14:26:10,323 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 657 treesize of output 639 [2023-08-27 14:26:10,459 INFO L209 tifierPushTermWalker]: Run 10 iterations without descend maybe there is a nontermination bug. [2023-08-27 14:26:10,496 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 639 treesize of output 621 [2023-08-27 14:26:10,691 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 621 treesize of output 609 [2023-08-27 14:26:10,826 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 609 treesize of output 603 [2023-08-27 14:26:10,969 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 603 treesize of output 591 [2023-08-27 14:26:20,226 WARN L667 sPolynomialRelations]: Constructing 128(two to the power of 7 dual juncts. [2023-08-27 14:27:29,746 WARN L667 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2023-08-27 14:28:00,034 WARN L667 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2023-08-27 14:29:01,346 WARN L667 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2023-08-27 14:30:14,788 WARN L667 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2023-08-27 14:31:49,634 WARN L667 sPolynomialRelations]: Constructing 128(two to the power of 7 dual juncts. [2023-08-27 14:34:05,886 WARN L667 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2023-08-27 14:35:02,599 WARN L667 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2023-08-27 14:36:24,566 WARN L667 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2023-08-27 14:38:26,843 WARN L667 sPolynomialRelations]: Constructing 128(two to the power of 7 dual juncts. Received shutdown request... [2023-08-27 14:38:43,556 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2023-08-27 14:38:43,582 WARN L266 SmtUtils]: Removed 2 from assertion stack [2023-08-27 14:38:43,583 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr2ASSERT_VIOLATIONASSERT (17 of 18 remaining) [2023-08-27 14:38:43,589 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 14:38:43,593 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2023-08-27 14:38:43,789 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2023-08-27 14:38:43,790 WARN L619 AbstractCegarLoop]: Verification canceled: while CegarLoopForPetriNet was analyzing trace of length 27 with TraceHistMax 2,while TraceCheckSpWp was constructing backward predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 5 for 31ms.. [2023-08-27 14:38:43,791 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (16 of 18 remaining) [2023-08-27 14:38:43,791 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW (15 of 18 remaining) [2023-08-27 14:38:43,791 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (14 of 18 remaining) [2023-08-27 14:38:43,791 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location thread2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW (13 of 18 remaining) [2023-08-27 14:38:43,791 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location thread3Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (12 of 18 remaining) [2023-08-27 14:38:43,791 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location thread3Err1ASSERT_VIOLATIONINTEGER_OVERFLOW (11 of 18 remaining) [2023-08-27 14:38:43,791 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW (10 of 18 remaining) [2023-08-27 14:38:43,791 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW (9 of 18 remaining) [2023-08-27 14:38:43,791 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (8 of 18 remaining) [2023-08-27 14:38:43,791 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (7 of 18 remaining) [2023-08-27 14:38:43,792 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (6 of 18 remaining) [2023-08-27 14:38:43,792 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (5 of 18 remaining) [2023-08-27 14:38:43,792 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW (4 of 18 remaining) [2023-08-27 14:38:43,792 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (3 of 18 remaining) [2023-08-27 14:38:43,792 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location thread2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW (2 of 18 remaining) [2023-08-27 14:38:43,792 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location thread3Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (1 of 18 remaining) [2023-08-27 14:38:43,792 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location thread3Err1ASSERT_VIOLATIONINTEGER_OVERFLOW (0 of 18 remaining) [2023-08-27 14:38:43,792 INFO L445 BasicCegarLoop]: Path program histogram: [17, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 14:38:43,796 INFO L228 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2023-08-27 14:38:43,796 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-08-27 14:38:43,798 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 27.08 02:38:43 BasicIcfg [2023-08-27 14:38:43,798 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-08-27 14:38:43,799 INFO L158 Benchmark]: Toolchain (without parser) took 833876.44ms. Allocated memory was 346.0MB in the beginning and 1.4GB in the end (delta: 1.1GB). Free memory was 321.9MB in the beginning and 1.2GB in the end (delta: -881.7MB). Peak memory consumption was 886.8MB. Max. memory is 16.0GB. [2023-08-27 14:38:43,799 INFO L158 Benchmark]: CDTParser took 0.10ms. Allocated memory is still 346.0MB. Free memory is still 322.3MB. There was no memory consumed. Max. memory is 16.0GB. [2023-08-27 14:38:43,799 INFO L158 Benchmark]: CACSL2BoogieTranslator took 287.01ms. Allocated memory is still 346.0MB. Free memory was 321.9MB in the beginning and 310.3MB in the end (delta: 11.7MB). Peak memory consumption was 12.6MB. Max. memory is 16.0GB. [2023-08-27 14:38:43,799 INFO L158 Benchmark]: Boogie Procedure Inliner took 48.59ms. Allocated memory is still 346.0MB. Free memory was 310.3MB in the beginning and 308.5MB in the end (delta: 1.8MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. [2023-08-27 14:38:43,799 INFO L158 Benchmark]: Boogie Preprocessor took 37.90ms. Allocated memory is still 346.0MB. Free memory was 308.5MB in the beginning and 306.9MB in the end (delta: 1.6MB). There was no memory consumed. Max. memory is 16.0GB. [2023-08-27 14:38:43,800 INFO L158 Benchmark]: RCFGBuilder took 554.09ms. Allocated memory is still 346.0MB. Free memory was 306.9MB in the beginning and 284.8MB in the end (delta: 22.1MB). Peak memory consumption was 23.1MB. Max. memory is 16.0GB. [2023-08-27 14:38:43,800 INFO L158 Benchmark]: TraceAbstraction took 832933.28ms. Allocated memory was 346.0MB in the beginning and 1.4GB in the end (delta: 1.1GB). Free memory was 284.2MB in the beginning and 1.2GB in the end (delta: -919.5MB). Peak memory consumption was 849.1MB. Max. memory is 16.0GB. [2023-08-27 14:38:43,801 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.10ms. Allocated memory is still 346.0MB. Free memory is still 322.3MB. There was no memory consumed. Max. memory is 16.0GB. * CACSL2BoogieTranslator took 287.01ms. Allocated memory is still 346.0MB. Free memory was 321.9MB in the beginning and 310.3MB in the end (delta: 11.7MB). Peak memory consumption was 12.6MB. Max. memory is 16.0GB. * Boogie Procedure Inliner took 48.59ms. Allocated memory is still 346.0MB. Free memory was 310.3MB in the beginning and 308.5MB in the end (delta: 1.8MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. * Boogie Preprocessor took 37.90ms. Allocated memory is still 346.0MB. Free memory was 308.5MB in the beginning and 306.9MB in the end (delta: 1.6MB). There was no memory consumed. Max. memory is 16.0GB. * RCFGBuilder took 554.09ms. Allocated memory is still 346.0MB. Free memory was 306.9MB in the beginning and 284.8MB in the end (delta: 22.1MB). Peak memory consumption was 23.1MB. Max. memory is 16.0GB. * TraceAbstraction took 832933.28ms. Allocated memory was 346.0MB in the beginning and 1.4GB in the end (delta: 1.1GB). Free memory was 284.2MB in the beginning and 1.2GB in the end (delta: -919.5MB). Peak memory consumption was 849.1MB. Max. memory is 16.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 5.2s, 150 PlacesBefore, 38 PlacesAfterwards, 152 TransitionsBefore, 32 TransitionsAfterwards, 2430 CoEnabledTransitionPairs, 8 FixpointIterations, 82 TrivialSequentialCompositions, 48 ConcurrentSequentialCompositions, 15 TrivialYvCompositions, 6 ConcurrentYvCompositions, 8 ChoiceCompositions, 159 TotalNumberOfCompositions, 2933 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 2715, independent: 2691, independent conditional: 0, independent unconditional: 2691, dependent: 24, dependent conditional: 0, dependent unconditional: 24, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 1362, independent: 1352, independent conditional: 0, independent unconditional: 1352, dependent: 10, dependent conditional: 0, dependent unconditional: 10, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 2715, independent: 1339, independent conditional: 0, independent unconditional: 1339, dependent: 14, dependent conditional: 0, dependent unconditional: 14, unknown: 1362, unknown conditional: 0, unknown unconditional: 1362] , Statistics on independence cache: Total cache size (in pairs): 82, Positive cache size: 80, Positive conditional cache size: 0, Positive unconditional cache size: 80, Negative cache size: 2, Negative conditional cache size: 0, Negative unconditional cache size: 2, 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 27 with TraceHistMax 2,while TraceCheckSpWp was constructing backward predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 5 for 31ms.. - TimeoutResultAtElement [Line: 46]: Timeout (TraceAbstraction) Unable to prove that integer overflow can never occur Cancelled while CegarLoopForPetriNet was analyzing trace of length 27 with TraceHistMax 2,while TraceCheckSpWp was constructing backward predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 5 for 31ms.. - TimeoutResultAtElement [Line: 46]: Timeout (TraceAbstraction) Unable to prove that integer overflow can never occur Cancelled while CegarLoopForPetriNet was analyzing trace of length 27 with TraceHistMax 2,while TraceCheckSpWp was constructing backward predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 5 for 31ms.. - TimeoutResultAtElement [Line: 58]: Timeout (TraceAbstraction) Unable to prove that integer overflow can never occur Cancelled while CegarLoopForPetriNet was analyzing trace of length 27 with TraceHistMax 2,while TraceCheckSpWp was constructing backward predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 5 for 31ms.. - TimeoutResultAtElement [Line: 58]: Timeout (TraceAbstraction) Unable to prove that integer overflow can never occur Cancelled while CegarLoopForPetriNet was analyzing trace of length 27 with TraceHistMax 2,while TraceCheckSpWp was constructing backward predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 5 for 31ms.. - TimeoutResultAtElement [Line: 70]: Timeout (TraceAbstraction) Unable to prove that integer overflow can never occur Cancelled while CegarLoopForPetriNet was analyzing trace of length 27 with TraceHistMax 2,while TraceCheckSpWp was constructing backward predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 5 for 31ms.. - TimeoutResultAtElement [Line: 70]: Timeout (TraceAbstraction) Unable to prove that integer overflow can never occur Cancelled while CegarLoopForPetriNet was analyzing trace of length 27 with TraceHistMax 2,while TraceCheckSpWp was constructing backward predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 5 for 31ms.. - TimeoutResultAtElement [Line: 110]: Timeout (TraceAbstraction) Unable to prove that integer overflow can never occur Cancelled while CegarLoopForPetriNet was analyzing trace of length 27 with TraceHistMax 2,while TraceCheckSpWp was constructing backward predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 5 for 31ms.. - TimeoutResultAtElement [Line: 110]: Timeout (TraceAbstraction) Unable to prove that integer overflow can never occur Cancelled while CegarLoopForPetriNet was analyzing trace of length 27 with TraceHistMax 2,while TraceCheckSpWp was constructing backward predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 5 for 31ms.. - TimeoutResultAtElement [Line: 93]: 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 27 with TraceHistMax 2,while TraceCheckSpWp was constructing backward predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 5 for 31ms.. - TimeoutResultAtElement [Line: 92]: 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 27 with TraceHistMax 2,while TraceCheckSpWp was constructing backward predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 5 for 31ms.. - TimeoutResultAtElement [Line: 94]: 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 27 with TraceHistMax 2,while TraceCheckSpWp was constructing backward predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 5 for 31ms.. - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 7 procedures, 200 locations, 18 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: 832.8s, OverallIterations: 36, TraceHistogramMax: 4, PathProgramHistogramMax: 17, EmptinessCheckTime: 0.0s, AutomataDifference: 35.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 5.4s, HoareTripleCheckerStatistics: 10 mSolverCounterUnknown, 2817 SdHoareTripleChecker+Valid, 8.6s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 2817 mSDsluCounter, 874 SdHoareTripleChecker+Invalid, 7.4s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 767 mSDsCounter, 124 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 13909 IncrementalHoareTripleChecker+Invalid, 14043 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 124 mSolverCounterUnsat, 107 mSDtfsCounter, 13909 mSolverCounterSat, 0.1s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 1454 GetRequests, 784 SyntacticMatches, 38 SemanticMatches, 632 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4569 ImplicationChecksByTransitivity, 15.9s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=5426occurred in iteration=29, InterpolantAutomatonStates: 390, 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, 1.3s SatisfiabilityAnalysisTime, 19.7s InterpolantComputationTime, 1167 NumberOfCodeBlocks, 1157 NumberOfCodeBlocksAsserted, 80 NumberOfCheckSat, 1604 ConstructedInterpolants, 6 QuantifiedInterpolants, 17212 SizeOfPredicates, 180 NumberOfNonLiveVariables, 6183 ConjunctsInSsa, 415 ConjunctsInUnsatCore, 90 InterpolantComputations, 11 PerfectInterpolantSequences, 183/378 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