/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-multiply-verify.wvr.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-ac9dbd0-m [2023-08-27 14:36:20,177 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-08-27 14:36:20,213 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 14:36:20,221 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-08-27 14:36:20,222 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Checked method. Library mode if empty. [2023-08-27 14:36:20,243 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-27 14:36:20,244 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-27 14:36:20,244 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-27 14:36:20,245 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-27 14:36:20,247 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-08-27 14:36:20,248 INFO L153 SettingsManager]: * Use SBE=true [2023-08-27 14:36:20,248 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-27 14:36:20,248 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-27 14:36:20,249 INFO L153 SettingsManager]: * sizeof long=4 [2023-08-27 14:36:20,249 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-27 14:36:20,249 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-08-27 14:36:20,249 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-08-27 14:36:20,250 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-27 14:36:20,250 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-27 14:36:20,250 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-27 14:36:20,250 INFO L153 SettingsManager]: * sizeof long double=12 [2023-08-27 14:36:20,251 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-08-27 14:36:20,251 INFO L153 SettingsManager]: * Use constant arrays=true [2023-08-27 14:36:20,251 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-27 14:36:20,251 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-27 14:36:20,251 INFO L153 SettingsManager]: * To the following directory=./dump/ [2023-08-27 14:36:20,252 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-27 14:36:20,252 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-27 14:36:20,252 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-27 14:36:20,252 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-27 14:36:20,253 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-27 14:36:20,253 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-27 14:36:20,253 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-27 14:36:20,253 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-27 14:36:20,253 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-27 14:36:20,254 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Order of the error locations to be checked -> PROGRAM_FIRST Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check absence of signed integer overflows -> true [2023-08-27 14:36:20,497 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-27 14:36:20,512 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-27 14:36:20,514 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-27 14:36:20,515 INFO L270 PluginConnector]: Initializing CDTParser... [2023-08-27 14:36:20,515 INFO L274 PluginConnector]: CDTParser initialized [2023-08-27 14:36:20,516 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/popl20-more-multiply-verify.wvr.c [2023-08-27 14:36:21,468 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-08-27 14:36:21,633 INFO L384 CDTParser]: Found 1 translation units. [2023-08-27 14:36:21,633 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-more-multiply-verify.wvr.c [2023-08-27 14:36:21,638 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a40329534/257694261b5c45bd8176f965ea98696b/FLAG8b4d93678 [2023-08-27 14:36:21,647 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a40329534/257694261b5c45bd8176f965ea98696b [2023-08-27 14:36:21,648 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-27 14:36:21,650 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-08-27 14:36:21,651 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-27 14:36:21,651 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-27 14:36:21,653 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-27 14:36:21,653 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.08 02:36:21" (1/1) ... [2023-08-27 14:36:21,653 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@758af15c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 02:36:21, skipping insertion in model container [2023-08-27 14:36:21,654 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.08 02:36:21" (1/1) ... [2023-08-27 14:36:21,668 INFO L176 MainTranslator]: Built tables and reachable declarations [2023-08-27 14:36:21,768 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-27 14:36:21,774 INFO L201 MainTranslator]: Completed pre-run [2023-08-27 14:36:21,790 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-27 14:36:21,795 WARN L669 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-08-27 14:36:21,795 WARN L669 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-08-27 14:36:21,799 INFO L206 MainTranslator]: Completed translation [2023-08-27 14:36:21,799 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 02:36:21 WrapperNode [2023-08-27 14:36:21,799 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-27 14:36:21,800 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-27 14:36:21,800 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-27 14:36:21,800 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-27 14:36:21,804 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 02:36:21" (1/1) ... [2023-08-27 14:36:21,809 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 02:36:21" (1/1) ... [2023-08-27 14:36:21,823 INFO L138 Inliner]: procedures = 26, calls = 51, calls flagged for inlining = 13, calls inlined = 13, statements flattened = 205 [2023-08-27 14:36:21,824 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-27 14:36:21,824 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-27 14:36:21,824 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-27 14:36:21,824 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-08-27 14:36:21,829 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 02:36:21" (1/1) ... [2023-08-27 14:36:21,830 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 02:36:21" (1/1) ... [2023-08-27 14:36:21,832 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 02:36:21" (1/1) ... [2023-08-27 14:36:21,832 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 02:36:21" (1/1) ... [2023-08-27 14:36:21,836 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 02:36:21" (1/1) ... [2023-08-27 14:36:21,838 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 02:36:21" (1/1) ... [2023-08-27 14:36:21,839 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 02:36:21" (1/1) ... [2023-08-27 14:36:21,840 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 02:36:21" (1/1) ... [2023-08-27 14:36:21,841 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-27 14:36:21,842 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-27 14:36:21,842 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-08-27 14:36:21,842 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-08-27 14:36:21,842 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 02:36:21" (1/1) ... [2023-08-27 14:36:21,846 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-27 14:36:21,860 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 14:36:21,871 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 14:36:21,889 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 14:36:21,898 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-27 14:36:21,898 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-27 14:36:21,898 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-27 14:36:21,898 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-27 14:36:21,899 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-08-27 14:36:21,899 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-08-27 14:36:21,899 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-08-27 14:36:21,899 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-08-27 14:36:21,899 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2023-08-27 14:36:21,899 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2023-08-27 14:36:21,899 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-27 14:36:21,899 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-08-27 14:36:21,899 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-08-27 14:36:21,899 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-08-27 14:36:21,899 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-27 14:36:21,899 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-27 14:36:21,899 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-27 14:36:21,901 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 14:36:21,993 INFO L236 CfgBuilder]: Building ICFG [2023-08-27 14:36:21,999 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-27 14:36:22,276 INFO L277 CfgBuilder]: Performing block encoding [2023-08-27 14:36:22,384 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-27 14:36:22,384 INFO L302 CfgBuilder]: Removed 3 assume(true) statements. [2023-08-27 14:36:22,387 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.08 02:36:22 BoogieIcfgContainer [2023-08-27 14:36:22,387 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-27 14:36:22,389 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-27 14:36:22,389 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-08-27 14:36:22,391 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-08-27 14:36:22,391 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.08 02:36:21" (1/3) ... [2023-08-27 14:36:22,392 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5e05b479 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.08 02:36:22, skipping insertion in model container [2023-08-27 14:36:22,392 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 02:36:21" (2/3) ... [2023-08-27 14:36:22,392 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5e05b479 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.08 02:36:22, skipping insertion in model container [2023-08-27 14:36:22,392 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.08 02:36:22" (3/3) ... [2023-08-27 14:36:22,393 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-more-multiply-verify.wvr.c [2023-08-27 14:36:22,405 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-27 14:36:22,405 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 13 error locations. [2023-08-27 14:36:22,406 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-27 14:36:22,485 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2023-08-27 14:36:22,510 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 170 places, 169 transitions, 362 flow [2023-08-27 14:36:22,581 INFO L124 PetriNetUnfolderBase]: 9/166 cut-off events. [2023-08-27 14:36:22,582 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-08-27 14:36:22,585 INFO L83 FinitePrefix]: Finished finitePrefix Result has 179 conditions, 166 events. 9/166 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 158 event pairs, 0 based on Foata normal form. 0/144 useless extension candidates. Maximal degree in co-relation 123. Up to 2 conditions per place. [2023-08-27 14:36:22,585 INFO L82 GeneralOperation]: Start removeDead. Operand has 170 places, 169 transitions, 362 flow [2023-08-27 14:36:22,590 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 156 places, 155 transitions, 328 flow [2023-08-27 14:36:22,592 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-27 14:36:22,601 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 156 places, 155 transitions, 328 flow [2023-08-27 14:36:22,604 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 156 places, 155 transitions, 328 flow [2023-08-27 14:36:22,605 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 156 places, 155 transitions, 328 flow [2023-08-27 14:36:22,651 INFO L124 PetriNetUnfolderBase]: 9/155 cut-off events. [2023-08-27 14:36:22,651 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-08-27 14:36:22,652 INFO L83 FinitePrefix]: Finished finitePrefix Result has 168 conditions, 155 events. 9/155 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 157 event pairs, 0 based on Foata normal form. 0/134 useless extension candidates. Maximal degree in co-relation 123. Up to 2 conditions per place. [2023-08-27 14:36:22,653 INFO L119 LiptonReduction]: Number of co-enabled transitions 2508 [2023-08-27 14:36:27,335 INFO L134 LiptonReduction]: Checked pairs total: 2877 [2023-08-27 14:36:27,335 INFO L136 LiptonReduction]: Total number of compositions: 149 [2023-08-27 14:36:27,344 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-27 14:36:27,348 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;@325d5df5, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-27 14:36:27,348 INFO L358 AbstractCegarLoop]: Starting to check reachability of 26 error locations. [2023-08-27 14:36:27,350 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-27 14:36:27,350 INFO L124 PetriNetUnfolderBase]: 1/2 cut-off events. [2023-08-27 14:36:27,350 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-27 14:36:27,350 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 14:36:27,350 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-27 14:36:27,350 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 23 more)] === [2023-08-27 14:36:27,353 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 14:36:27,353 INFO L85 PathProgramCache]: Analyzing trace with hash 24616, now seen corresponding path program 1 times [2023-08-27 14:36:27,359 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 14:36:27,359 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [454461901] [2023-08-27 14:36:27,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 14:36:27,359 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 14:36:27,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 14:36:27,520 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 14:36:27,520 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 14:36:27,520 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [454461901] [2023-08-27 14:36:27,521 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [454461901] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-27 14:36:27,521 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-27 14:36:27,521 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-27 14:36:27,522 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [251080859] [2023-08-27 14:36:27,522 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-27 14:36:27,527 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-27 14:36:27,530 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 14:36:27,541 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-27 14:36:27,542 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-27 14:36:27,543 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 137 out of 318 [2023-08-27 14:36:27,545 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 34 transitions, 86 flow. Second operand has 3 states, 3 states have (on average 137.66666666666666) internal successors, (413), 3 states have internal predecessors, (413), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:36:27,545 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 14:36:27,545 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 137 of 318 [2023-08-27 14:36:27,545 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 14:36:27,663 INFO L124 PetriNetUnfolderBase]: 523/780 cut-off events. [2023-08-27 14:36:27,663 INFO L125 PetriNetUnfolderBase]: For 72/72 co-relation queries the response was YES. [2023-08-27 14:36:27,666 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1633 conditions, 780 events. 523/780 cut-off events. For 72/72 co-relation queries the response was YES. Maximal size of possible extension queue 60. Compared 2668 event pairs, 413 based on Foata normal form. 0/434 useless extension candidates. Maximal degree in co-relation 1320. Up to 780 conditions per place. [2023-08-27 14:36:27,671 INFO L140 encePairwiseOnDemand]: 308/318 looper letters, 28 selfloop transitions, 3 changer transitions 0/31 dead transitions. [2023-08-27 14:36:27,671 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 38 places, 31 transitions, 142 flow [2023-08-27 14:36:27,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-27 14:36:27,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-27 14:36:27,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 449 transitions. [2023-08-27 14:36:27,682 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47064989517819705 [2023-08-27 14:36:27,682 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 449 transitions. [2023-08-27 14:36:27,683 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 449 transitions. [2023-08-27 14:36:27,684 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 14:36:27,685 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 449 transitions. [2023-08-27 14:36:27,688 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 14:36:27,691 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 318.0) internal successors, (1272), 4 states have internal predecessors, (1272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:36:27,692 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 318.0) internal successors, (1272), 4 states have internal predecessors, (1272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:36:27,693 INFO L175 Difference]: Start difference. First operand has 41 places, 34 transitions, 86 flow. Second operand 3 states and 449 transitions. [2023-08-27 14:36:27,693 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 38 places, 31 transitions, 142 flow [2023-08-27 14:36:27,696 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 32 places, 31 transitions, 130 flow, removed 0 selfloop flow, removed 6 redundant places. [2023-08-27 14:36:27,696 INFO L231 Difference]: Finished difference. Result has 33 places, 31 transitions, 85 flow [2023-08-27 14:36:27,698 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=318, PETRI_DIFFERENCE_MINUEND_FLOW=64, PETRI_DIFFERENCE_MINUEND_PLACES=30, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=85, PETRI_PLACES=33, PETRI_TRANSITIONS=31} [2023-08-27 14:36:27,699 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, -8 predicate places. [2023-08-27 14:36:27,700 INFO L495 AbstractCegarLoop]: Abstraction has has 33 places, 31 transitions, 85 flow [2023-08-27 14:36:27,700 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 137.66666666666666) internal successors, (413), 3 states have internal predecessors, (413), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:36:27,700 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 14:36:27,700 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-08-27 14:36:27,700 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-27 14:36:27,700 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 23 more)] === [2023-08-27 14:36:27,701 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 14:36:27,701 INFO L85 PathProgramCache]: Analyzing trace with hash 764431, now seen corresponding path program 1 times [2023-08-27 14:36:27,701 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 14:36:27,701 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [238491664] [2023-08-27 14:36:27,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 14:36:27,701 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 14:36:27,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 14:36:27,778 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 14:36:27,778 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 14:36:27,778 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [238491664] [2023-08-27 14:36:27,779 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [238491664] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 14:36:27,779 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1879560904] [2023-08-27 14:36:27,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 14:36:27,779 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 14:36:27,779 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 14:36:27,782 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 14:36:27,821 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 14:36:27,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 14:36:27,887 INFO L262 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-27 14:36:27,890 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 14:36:27,925 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 14:36:27,925 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-27 14:36:27,926 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1879560904] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-27 14:36:27,926 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-27 14:36:27,926 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [2] total 3 [2023-08-27 14:36:27,927 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1015737593] [2023-08-27 14:36:27,927 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-27 14:36:27,928 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-27 14:36:27,928 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 14:36:27,928 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-27 14:36:27,930 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-08-27 14:36:27,931 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 137 out of 318 [2023-08-27 14:36:27,932 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 33 places, 31 transitions, 85 flow. Second operand has 4 states, 4 states have (on average 137.75) internal successors, (551), 4 states have internal predecessors, (551), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:36:27,932 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 14:36:27,932 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 137 of 318 [2023-08-27 14:36:27,932 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 14:36:28,030 INFO L124 PetriNetUnfolderBase]: 523/779 cut-off events. [2023-08-27 14:36:28,030 INFO L125 PetriNetUnfolderBase]: For 16/16 co-relation queries the response was YES. [2023-08-27 14:36:28,031 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1591 conditions, 779 events. 523/779 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 60. Compared 2657 event pairs, 413 based on Foata normal form. 0/434 useless extension candidates. Maximal degree in co-relation 1567. Up to 776 conditions per place. [2023-08-27 14:36:28,033 INFO L140 encePairwiseOnDemand]: 314/318 looper letters, 26 selfloop transitions, 4 changer transitions 0/30 dead transitions. [2023-08-27 14:36:28,033 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 35 places, 30 transitions, 141 flow [2023-08-27 14:36:28,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-27 14:36:28,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-27 14:36:28,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 579 transitions. [2023-08-27 14:36:28,035 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.455188679245283 [2023-08-27 14:36:28,036 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 579 transitions. [2023-08-27 14:36:28,036 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 579 transitions. [2023-08-27 14:36:28,036 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 14:36:28,036 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 579 transitions. [2023-08-27 14:36:28,037 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 144.75) internal successors, (579), 4 states have internal predecessors, (579), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:36:28,039 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 318.0) internal successors, (1590), 5 states have internal predecessors, (1590), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:36:28,040 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 318.0) internal successors, (1590), 5 states have internal predecessors, (1590), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:36:28,040 INFO L175 Difference]: Start difference. First operand has 33 places, 31 transitions, 85 flow. Second operand 4 states and 579 transitions. [2023-08-27 14:36:28,040 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 35 places, 30 transitions, 141 flow [2023-08-27 14:36:28,040 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 34 places, 30 transitions, 136 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-08-27 14:36:28,041 INFO L231 Difference]: Finished difference. Result has 34 places, 30 transitions, 84 flow [2023-08-27 14:36:28,041 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=318, PETRI_DIFFERENCE_MINUEND_FLOW=76, PETRI_DIFFERENCE_MINUEND_PLACES=31, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=30, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=84, PETRI_PLACES=34, PETRI_TRANSITIONS=30} [2023-08-27 14:36:28,042 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, -7 predicate places. [2023-08-27 14:36:28,042 INFO L495 AbstractCegarLoop]: Abstraction has has 34 places, 30 transitions, 84 flow [2023-08-27 14:36:28,042 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 137.75) internal successors, (551), 4 states have internal predecessors, (551), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:36:28,042 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 14:36:28,042 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-08-27 14:36:28,053 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-08-27 14:36:28,246 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 14:36:28,247 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 23 more)] === [2023-08-27 14:36:28,247 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 14:36:28,247 INFO L85 PathProgramCache]: Analyzing trace with hash 764441, now seen corresponding path program 1 times [2023-08-27 14:36:28,247 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 14:36:28,247 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [402128907] [2023-08-27 14:36:28,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 14:36:28,248 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 14:36:28,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 14:36:28,292 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 14:36:28,292 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 14:36:28,292 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [402128907] [2023-08-27 14:36:28,293 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [402128907] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 14:36:28,293 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [302262788] [2023-08-27 14:36:28,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 14:36:28,293 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 14:36:28,293 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 14:36:28,294 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 14:36:28,314 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 14:36:28,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 14:36:28,363 INFO L262 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-27 14:36:28,364 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 14:36:28,371 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 14:36:28,371 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 14:36:28,386 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 14:36:28,386 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [302262788] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 14:36:28,386 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 14:36:28,386 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 5 [2023-08-27 14:36:28,386 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [417580233] [2023-08-27 14:36:28,386 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 14:36:28,387 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-27 14:36:28,387 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 14:36:28,387 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-27 14:36:28,387 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-08-27 14:36:28,388 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 137 out of 318 [2023-08-27 14:36:28,389 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 34 places, 30 transitions, 84 flow. Second operand has 7 states, 7 states have (on average 138.14285714285714) internal successors, (967), 7 states have internal predecessors, (967), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:36:28,390 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 14:36:28,390 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 137 of 318 [2023-08-27 14:36:28,390 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 14:36:28,519 INFO L124 PetriNetUnfolderBase]: 526/785 cut-off events. [2023-08-27 14:36:28,520 INFO L125 PetriNetUnfolderBase]: For 16/16 co-relation queries the response was YES. [2023-08-27 14:36:28,520 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1613 conditions, 785 events. 526/785 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 60. Compared 2681 event pairs, 413 based on Foata normal form. 0/442 useless extension candidates. Maximal degree in co-relation 1567. Up to 782 conditions per place. [2023-08-27 14:36:28,522 INFO L140 encePairwiseOnDemand]: 314/318 looper letters, 27 selfloop transitions, 9 changer transitions 0/36 dead transitions. [2023-08-27 14:36:28,523 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 39 places, 36 transitions, 186 flow [2023-08-27 14:36:28,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-27 14:36:28,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-27 14:36:28,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 861 transitions. [2023-08-27 14:36:28,525 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45125786163522014 [2023-08-27 14:36:28,525 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 861 transitions. [2023-08-27 14:36:28,525 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 861 transitions. [2023-08-27 14:36:28,525 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 14:36:28,525 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 861 transitions. [2023-08-27 14:36:28,527 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 143.5) internal successors, (861), 6 states have internal predecessors, (861), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:36:28,529 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 318.0) internal successors, (2226), 7 states have internal predecessors, (2226), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:36:28,530 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 318.0) internal successors, (2226), 7 states have internal predecessors, (2226), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:36:28,530 INFO L175 Difference]: Start difference. First operand has 34 places, 30 transitions, 84 flow. Second operand 6 states and 861 transitions. [2023-08-27 14:36:28,530 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 39 places, 36 transitions, 186 flow [2023-08-27 14:36:28,530 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 37 places, 36 transitions, 177 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-27 14:36:28,532 INFO L231 Difference]: Finished difference. Result has 40 places, 36 transitions, 142 flow [2023-08-27 14:36:28,532 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=318, PETRI_DIFFERENCE_MINUEND_FLOW=78, PETRI_DIFFERENCE_MINUEND_PLACES=32, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=30, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=142, PETRI_PLACES=40, PETRI_TRANSITIONS=36} [2023-08-27 14:36:28,533 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, -1 predicate places. [2023-08-27 14:36:28,533 INFO L495 AbstractCegarLoop]: Abstraction has has 40 places, 36 transitions, 142 flow [2023-08-27 14:36:28,533 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 138.14285714285714) internal successors, (967), 7 states have internal predecessors, (967), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:36:28,533 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 14:36:28,533 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-27 14:36:28,543 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-08-27 14:36:28,740 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 14:36:28,741 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 23 more)] === [2023-08-27 14:36:28,741 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 14:36:28,741 INFO L85 PathProgramCache]: Analyzing trace with hash 734336447, now seen corresponding path program 1 times [2023-08-27 14:36:28,741 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 14:36:28,742 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1790861631] [2023-08-27 14:36:28,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 14:36:28,742 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 14:36:28,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 14:36:28,823 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 14:36:28,823 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 14:36:28,824 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1790861631] [2023-08-27 14:36:28,824 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1790861631] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-27 14:36:28,824 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-27 14:36:28,824 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-27 14:36:28,824 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1745460648] [2023-08-27 14:36:28,825 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-27 14:36:28,825 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-27 14:36:28,825 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 14:36:28,826 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-27 14:36:28,826 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-27 14:36:28,827 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 130 out of 318 [2023-08-27 14:36:28,827 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 40 places, 36 transitions, 142 flow. Second operand has 4 states, 4 states have (on average 131.25) internal successors, (525), 4 states have internal predecessors, (525), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:36:28,827 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 14:36:28,827 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 130 of 318 [2023-08-27 14:36:28,827 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 14:36:28,931 INFO L124 PetriNetUnfolderBase]: 530/810 cut-off events. [2023-08-27 14:36:28,931 INFO L125 PetriNetUnfolderBase]: For 14/14 co-relation queries the response was YES. [2023-08-27 14:36:28,931 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1687 conditions, 810 events. 530/810 cut-off events. For 14/14 co-relation queries the response was YES. Maximal size of possible extension queue 62. Compared 2877 event pairs, 366 based on Foata normal form. 0/504 useless extension candidates. Maximal degree in co-relation 1651. Up to 644 conditions per place. [2023-08-27 14:36:28,934 INFO L140 encePairwiseOnDemand]: 307/318 looper letters, 47 selfloop transitions, 4 changer transitions 0/51 dead transitions. [2023-08-27 14:36:28,934 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 51 transitions, 279 flow [2023-08-27 14:36:28,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-27 14:36:28,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-27 14:36:28,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 572 transitions. [2023-08-27 14:36:28,936 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.449685534591195 [2023-08-27 14:36:28,936 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 572 transitions. [2023-08-27 14:36:28,936 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 572 transitions. [2023-08-27 14:36:28,936 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 14:36:28,937 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 572 transitions. [2023-08-27 14:36:28,937 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 143.0) internal successors, (572), 4 states have internal predecessors, (572), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:36:28,939 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 318.0) internal successors, (1590), 5 states have internal predecessors, (1590), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:36:28,940 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 318.0) internal successors, (1590), 5 states have internal predecessors, (1590), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:36:28,940 INFO L175 Difference]: Start difference. First operand has 40 places, 36 transitions, 142 flow. Second operand 4 states and 572 transitions. [2023-08-27 14:36:28,940 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 51 transitions, 279 flow [2023-08-27 14:36:28,943 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 51 transitions, 258 flow, removed 9 selfloop flow, removed 1 redundant places. [2023-08-27 14:36:28,943 INFO L231 Difference]: Finished difference. Result has 44 places, 37 transitions, 152 flow [2023-08-27 14:36:28,945 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=318, PETRI_DIFFERENCE_MINUEND_FLOW=121, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=152, PETRI_PLACES=44, PETRI_TRANSITIONS=37} [2023-08-27 14:36:28,947 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 3 predicate places. [2023-08-27 14:36:28,947 INFO L495 AbstractCegarLoop]: Abstraction has has 44 places, 37 transitions, 152 flow [2023-08-27 14:36:28,948 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 131.25) internal successors, (525), 4 states have internal predecessors, (525), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:36:28,951 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 14:36:28,951 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1] [2023-08-27 14:36:28,951 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-08-27 14:36:28,951 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 23 more)] === [2023-08-27 14:36:28,952 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 14:36:28,952 INFO L85 PathProgramCache]: Analyzing trace with hash 1299653106, now seen corresponding path program 2 times [2023-08-27 14:36:28,952 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 14:36:28,952 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1290641514] [2023-08-27 14:36:28,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 14:36:28,952 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 14:36:28,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 14:36:29,047 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 14:36:29,048 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 14:36:29,048 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1290641514] [2023-08-27 14:36:29,048 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1290641514] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 14:36:29,048 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [93301622] [2023-08-27 14:36:29,048 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-27 14:36:29,048 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 14:36:29,048 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 14:36:29,049 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 14:36:29,051 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 14:36:29,113 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-08-27 14:36:29,113 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 14:36:29,114 INFO L262 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-27 14:36:29,114 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 14:36:29,126 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 14:36:29,126 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-27 14:36:29,129 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [93301622] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-27 14:36:29,129 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-27 14:36:29,129 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [5] total 6 [2023-08-27 14:36:29,129 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1926661378] [2023-08-27 14:36:29,129 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-27 14:36:29,130 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-27 14:36:29,130 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 14:36:29,130 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-27 14:36:29,130 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2023-08-27 14:36:29,131 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 138 out of 318 [2023-08-27 14:36:29,131 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 37 transitions, 152 flow. Second operand has 3 states, 3 states have (on average 139.0) internal successors, (417), 3 states have internal predecessors, (417), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:36:29,131 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 14:36:29,131 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 138 of 318 [2023-08-27 14:36:29,131 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 14:36:29,200 INFO L124 PetriNetUnfolderBase]: 530/809 cut-off events. [2023-08-27 14:36:29,201 INFO L125 PetriNetUnfolderBase]: For 179/179 co-relation queries the response was YES. [2023-08-27 14:36:29,201 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2075 conditions, 809 events. 530/809 cut-off events. For 179/179 co-relation queries the response was YES. Maximal size of possible extension queue 63. Compared 2849 event pairs, 392 based on Foata normal form. 1/636 useless extension candidates. Maximal degree in co-relation 2048. Up to 809 conditions per place. [2023-08-27 14:36:29,204 INFO L140 encePairwiseOnDemand]: 316/318 looper letters, 35 selfloop transitions, 1 changer transitions 0/36 dead transitions. [2023-08-27 14:36:29,204 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 36 transitions, 214 flow [2023-08-27 14:36:29,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-27 14:36:29,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-27 14:36:29,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 442 transitions. [2023-08-27 14:36:29,206 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46331236897274636 [2023-08-27 14:36:29,206 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 442 transitions. [2023-08-27 14:36:29,206 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 442 transitions. [2023-08-27 14:36:29,206 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 14:36:29,206 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 442 transitions. [2023-08-27 14:36:29,208 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 147.33333333333334) internal successors, (442), 3 states have internal predecessors, (442), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:36:29,209 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 318.0) internal successors, (1272), 4 states have internal predecessors, (1272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:36:29,209 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 318.0) internal successors, (1272), 4 states have internal predecessors, (1272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:36:29,209 INFO L175 Difference]: Start difference. First operand has 44 places, 37 transitions, 152 flow. Second operand 3 states and 442 transitions. [2023-08-27 14:36:29,209 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 36 transitions, 214 flow [2023-08-27 14:36:29,210 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 36 transitions, 195 flow, removed 2 selfloop flow, removed 5 redundant places. [2023-08-27 14:36:29,211 INFO L231 Difference]: Finished difference. Result has 40 places, 36 transitions, 125 flow [2023-08-27 14:36:29,211 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=318, PETRI_DIFFERENCE_MINUEND_FLOW=123, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=125, PETRI_PLACES=40, PETRI_TRANSITIONS=36} [2023-08-27 14:36:29,213 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, -1 predicate places. [2023-08-27 14:36:29,213 INFO L495 AbstractCegarLoop]: Abstraction has has 40 places, 36 transitions, 125 flow [2023-08-27 14:36:29,213 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 139.0) internal successors, (417), 3 states have internal predecessors, (417), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:36:29,213 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 14:36:29,213 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-08-27 14:36:29,220 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-08-27 14:36:29,418 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 14:36:29,420 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 23 more)] === [2023-08-27 14:36:29,420 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 14:36:29,420 INFO L85 PathProgramCache]: Analyzing trace with hash 1299328632, now seen corresponding path program 1 times [2023-08-27 14:36:29,421 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 14:36:29,421 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [275692464] [2023-08-27 14:36:29,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 14:36:29,421 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 14:36:29,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 14:36:29,479 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 14:36:29,479 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 14:36:29,479 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [275692464] [2023-08-27 14:36:29,479 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [275692464] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 14:36:29,480 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1133099403] [2023-08-27 14:36:29,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 14:36:29,480 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 14:36:29,480 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 14:36:29,481 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 14:36:29,483 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 14:36:29,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 14:36:29,543 INFO L262 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-27 14:36:29,544 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 14:36:29,551 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 14:36:29,551 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-27 14:36:29,552 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1133099403] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-27 14:36:29,552 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-27 14:36:29,552 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [3] total 4 [2023-08-27 14:36:29,552 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [644977634] [2023-08-27 14:36:29,552 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-27 14:36:29,552 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-27 14:36:29,552 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 14:36:29,552 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-27 14:36:29,553 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-08-27 14:36:29,553 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 142 out of 318 [2023-08-27 14:36:29,553 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 40 places, 36 transitions, 125 flow. Second operand has 3 states, 3 states have (on average 144.0) internal successors, (432), 3 states have internal predecessors, (432), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:36:29,553 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 14:36:29,554 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 142 of 318 [2023-08-27 14:36:29,554 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 14:36:29,592 INFO L124 PetriNetUnfolderBase]: 225/356 cut-off events. [2023-08-27 14:36:29,592 INFO L125 PetriNetUnfolderBase]: For 101/101 co-relation queries the response was YES. [2023-08-27 14:36:29,592 INFO L83 FinitePrefix]: Finished finitePrefix Result has 878 conditions, 356 events. 225/356 cut-off events. For 101/101 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 938 event pairs, 139 based on Foata normal form. 0/356 useless extension candidates. Maximal degree in co-relation 867. Up to 356 conditions per place. [2023-08-27 14:36:29,593 INFO L140 encePairwiseOnDemand]: 313/318 looper letters, 31 selfloop transitions, 1 changer transitions 0/32 dead transitions. [2023-08-27 14:36:29,593 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 38 places, 32 transitions, 173 flow [2023-08-27 14:36:29,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-27 14:36:29,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-27 14:36:29,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 453 transitions. [2023-08-27 14:36:29,594 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4748427672955975 [2023-08-27 14:36:29,595 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 453 transitions. [2023-08-27 14:36:29,595 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 453 transitions. [2023-08-27 14:36:29,595 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 14:36:29,595 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 453 transitions. [2023-08-27 14:36:29,596 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 14:36:29,597 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 318.0) internal successors, (1272), 4 states have internal predecessors, (1272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:36:29,597 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 318.0) internal successors, (1272), 4 states have internal predecessors, (1272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:36:29,597 INFO L175 Difference]: Start difference. First operand has 40 places, 36 transitions, 125 flow. Second operand 3 states and 453 transitions. [2023-08-27 14:36:29,597 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 38 places, 32 transitions, 173 flow [2023-08-27 14:36:29,598 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 37 places, 32 transitions, 172 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-27 14:36:29,598 INFO L231 Difference]: Finished difference. Result has 37 places, 32 transitions, 110 flow [2023-08-27 14:36:29,598 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=318, PETRI_DIFFERENCE_MINUEND_FLOW=108, PETRI_DIFFERENCE_MINUEND_PLACES=35, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=110, PETRI_PLACES=37, PETRI_TRANSITIONS=32} [2023-08-27 14:36:29,599 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, -4 predicate places. [2023-08-27 14:36:29,599 INFO L495 AbstractCegarLoop]: Abstraction has has 37 places, 32 transitions, 110 flow [2023-08-27 14:36:29,599 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 144.0) internal successors, (432), 3 states have internal predecessors, (432), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:36:29,599 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 14:36:29,599 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 14:36:29,606 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-08-27 14:36:29,809 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 14:36:29,809 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting thread3Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 23 more)] === [2023-08-27 14:36:29,810 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 14:36:29,810 INFO L85 PathProgramCache]: Analyzing trace with hash -1903608878, now seen corresponding path program 1 times [2023-08-27 14:36:29,810 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 14:36:29,810 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1952718402] [2023-08-27 14:36:29,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 14:36:29,810 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 14:36:29,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 14:36:29,860 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 14:36:29,860 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 14:36:29,861 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1952718402] [2023-08-27 14:36:29,861 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1952718402] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-27 14:36:29,861 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-27 14:36:29,861 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-27 14:36:29,861 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [756947875] [2023-08-27 14:36:29,861 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-27 14:36:29,861 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-27 14:36:29,861 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 14:36:29,861 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-27 14:36:29,863 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-27 14:36:29,863 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 135 out of 318 [2023-08-27 14:36:29,864 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 37 places, 32 transitions, 110 flow. Second operand has 4 states, 4 states have (on average 137.0) internal successors, (548), 4 states have internal predecessors, (548), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:36:29,864 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 14:36:29,864 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 135 of 318 [2023-08-27 14:36:29,866 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 14:36:29,899 INFO L124 PetriNetUnfolderBase]: 172/277 cut-off events. [2023-08-27 14:36:29,900 INFO L125 PetriNetUnfolderBase]: For 98/98 co-relation queries the response was YES. [2023-08-27 14:36:29,900 INFO L83 FinitePrefix]: Finished finitePrefix Result has 661 conditions, 277 events. 172/277 cut-off events. For 98/98 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 684 event pairs, 108 based on Foata normal form. 34/311 useless extension candidates. Maximal degree in co-relation 649. Up to 277 conditions per place. [2023-08-27 14:36:29,901 INFO L140 encePairwiseOnDemand]: 316/318 looper letters, 28 selfloop transitions, 1 changer transitions 1/30 dead transitions. [2023-08-27 14:36:29,901 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 38 places, 30 transitions, 160 flow [2023-08-27 14:36:29,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-27 14:36:29,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-27 14:36:29,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 428 transitions. [2023-08-27 14:36:29,902 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44863731656184486 [2023-08-27 14:36:29,902 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 428 transitions. [2023-08-27 14:36:29,902 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 428 transitions. [2023-08-27 14:36:29,902 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 14:36:29,902 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 428 transitions. [2023-08-27 14:36:29,903 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 142.66666666666666) internal successors, (428), 3 states have internal predecessors, (428), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:36:29,904 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 318.0) internal successors, (1272), 4 states have internal predecessors, (1272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:36:29,905 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 318.0) internal successors, (1272), 4 states have internal predecessors, (1272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:36:29,905 INFO L175 Difference]: Start difference. First operand has 37 places, 32 transitions, 110 flow. Second operand 3 states and 428 transitions. [2023-08-27 14:36:29,905 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 38 places, 30 transitions, 160 flow [2023-08-27 14:36:29,905 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 35 places, 30 transitions, 155 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-08-27 14:36:29,906 INFO L231 Difference]: Finished difference. Result has 35 places, 29 transitions, 91 flow [2023-08-27 14:36:29,906 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=318, PETRI_DIFFERENCE_MINUEND_FLOW=95, PETRI_DIFFERENCE_MINUEND_PLACES=33, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=30, 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=29} [2023-08-27 14:36:29,906 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, -6 predicate places. [2023-08-27 14:36:29,908 INFO L495 AbstractCegarLoop]: Abstraction has has 35 places, 29 transitions, 91 flow [2023-08-27 14:36:29,908 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 137.0) internal successors, (548), 4 states have internal predecessors, (548), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:36:29,908 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 14:36:29,908 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] [2023-08-27 14:36:29,908 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-08-27 14:36:29,908 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONASSERT === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 23 more)] === [2023-08-27 14:36:29,909 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 14:36:29,909 INFO L85 PathProgramCache]: Analyzing trace with hash -1092209789, now seen corresponding path program 1 times [2023-08-27 14:36:29,909 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 14:36:29,909 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1072726709] [2023-08-27 14:36:29,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 14:36:29,909 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 14:36:29,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 14:36:30,014 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 14:36:30,016 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 14:36:30,017 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1072726709] [2023-08-27 14:36:30,018 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1072726709] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 14:36:30,018 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [816116016] [2023-08-27 14:36:30,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 14:36:30,018 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 14:36:30,018 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 14:36:30,019 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 14:36:30,021 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 14:36:30,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 14:36:30,103 INFO L262 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 8 conjunts are in the unsatisfiable core [2023-08-27 14:36:30,104 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 14:36:30,160 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 14:36:30,161 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 14:36:30,238 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 14:36:30,239 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [816116016] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 14:36:30,239 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 14:36:30,239 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5, 5] total 10 [2023-08-27 14:36:30,239 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1957073246] [2023-08-27 14:36:30,239 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 14:36:30,239 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-08-27 14:36:30,240 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 14:36:30,240 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-08-27 14:36:30,240 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2023-08-27 14:36:30,241 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 128 out of 318 [2023-08-27 14:36:30,242 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 35 places, 29 transitions, 91 flow. Second operand has 11 states, 11 states have (on average 131.1818181818182) internal successors, (1443), 11 states have internal predecessors, (1443), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:36:30,243 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 14:36:30,243 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 128 of 318 [2023-08-27 14:36:30,243 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 14:36:30,339 INFO L124 PetriNetUnfolderBase]: 205/332 cut-off events. [2023-08-27 14:36:30,339 INFO L125 PetriNetUnfolderBase]: For 69/69 co-relation queries the response was YES. [2023-08-27 14:36:30,339 INFO L83 FinitePrefix]: Finished finitePrefix Result has 790 conditions, 332 events. 205/332 cut-off events. For 69/69 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 922 event pairs, 108 based on Foata normal form. 30/362 useless extension candidates. Maximal degree in co-relation 779. Up to 221 conditions per place. [2023-08-27 14:36:30,340 INFO L140 encePairwiseOnDemand]: 312/318 looper letters, 25 selfloop transitions, 3 changer transitions 24/52 dead transitions. [2023-08-27 14:36:30,340 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 39 places, 52 transitions, 251 flow [2023-08-27 14:36:30,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-27 14:36:30,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-27 14:36:30,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 820 transitions. [2023-08-27 14:36:30,342 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.429769392033543 [2023-08-27 14:36:30,343 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 820 transitions. [2023-08-27 14:36:30,343 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 820 transitions. [2023-08-27 14:36:30,343 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 14:36:30,343 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 820 transitions. [2023-08-27 14:36:30,344 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 136.66666666666666) internal successors, (820), 6 states have internal predecessors, (820), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:36:30,346 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 318.0) internal successors, (2226), 7 states have internal predecessors, (2226), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:36:30,347 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 318.0) internal successors, (2226), 7 states have internal predecessors, (2226), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:36:30,347 INFO L175 Difference]: Start difference. First operand has 35 places, 29 transitions, 91 flow. Second operand 6 states and 820 transitions. [2023-08-27 14:36:30,347 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 39 places, 52 transitions, 251 flow [2023-08-27 14:36:30,348 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 38 places, 52 transitions, 250 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-27 14:36:30,348 INFO L231 Difference]: Finished difference. Result has 40 places, 28 transitions, 103 flow [2023-08-27 14:36:30,348 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=318, PETRI_DIFFERENCE_MINUEND_FLOW=90, PETRI_DIFFERENCE_MINUEND_PLACES=33, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=103, PETRI_PLACES=40, PETRI_TRANSITIONS=28} [2023-08-27 14:36:30,349 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, -1 predicate places. [2023-08-27 14:36:30,349 INFO L495 AbstractCegarLoop]: Abstraction has has 40 places, 28 transitions, 103 flow [2023-08-27 14:36:30,349 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 131.1818181818182) internal successors, (1443), 11 states have internal predecessors, (1443), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:36:30,350 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 14:36:30,350 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] [2023-08-27 14:36:30,363 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 14:36:30,554 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 14:36:30,555 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONASSERT === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 23 more)] === [2023-08-27 14:36:30,555 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 14:36:30,555 INFO L85 PathProgramCache]: Analyzing trace with hash -2081471006, now seen corresponding path program 2 times [2023-08-27 14:36:30,555 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 14:36:30,555 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1682779929] [2023-08-27 14:36:30,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 14:36:30,556 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 14:36:30,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 14:36:31,674 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 14:36:31,674 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 14:36:31,674 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1682779929] [2023-08-27 14:36:31,674 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1682779929] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 14:36:31,674 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1629565330] [2023-08-27 14:36:31,674 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-27 14:36:31,674 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 14:36:31,674 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 14:36:31,675 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 14:36:31,711 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 14:36:31,802 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-08-27 14:36:31,802 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 14:36:31,803 INFO L262 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 38 conjunts are in the unsatisfiable core [2023-08-27 14:36:31,805 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 14:36:31,915 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-27 14:36:31,920 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 22 [2023-08-27 14:36:32,022 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 14:36:32,022 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-27 14:36:32,022 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1629565330] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-27 14:36:32,023 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-27 14:36:32,023 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [10] total 18 [2023-08-27 14:36:32,023 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1293854263] [2023-08-27 14:36:32,023 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-27 14:36:32,023 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-08-27 14:36:32,023 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 14:36:32,023 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-08-27 14:36:32,024 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=333, Unknown=0, NotChecked=0, Total=380 [2023-08-27 14:36:32,025 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 110 out of 318 [2023-08-27 14:36:32,025 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 40 places, 28 transitions, 103 flow. Second operand has 10 states, 10 states have (on average 112.0) internal successors, (1120), 10 states have internal predecessors, (1120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:36:32,026 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 14:36:32,026 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 110 of 318 [2023-08-27 14:36:32,026 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 14:36:32,264 INFO L124 PetriNetUnfolderBase]: 171/292 cut-off events. [2023-08-27 14:36:32,264 INFO L125 PetriNetUnfolderBase]: For 405/405 co-relation queries the response was YES. [2023-08-27 14:36:32,264 INFO L83 FinitePrefix]: Finished finitePrefix Result has 876 conditions, 292 events. 171/292 cut-off events. For 405/405 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 858 event pairs, 32 based on Foata normal form. 25/317 useless extension candidates. Maximal degree in co-relation 862. Up to 137 conditions per place. [2023-08-27 14:36:32,266 INFO L140 encePairwiseOnDemand]: 307/318 looper letters, 54 selfloop transitions, 13 changer transitions 13/80 dead transitions. [2023-08-27 14:36:32,266 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 80 transitions, 424 flow [2023-08-27 14:36:32,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-08-27 14:36:32,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-08-27 14:36:32,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 959 transitions. [2023-08-27 14:36:32,268 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37696540880503143 [2023-08-27 14:36:32,268 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 959 transitions. [2023-08-27 14:36:32,268 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 959 transitions. [2023-08-27 14:36:32,268 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 14:36:32,268 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 959 transitions. [2023-08-27 14:36:32,270 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 119.875) internal successors, (959), 8 states have internal predecessors, (959), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:36:32,272 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 318.0) internal successors, (2862), 9 states have internal predecessors, (2862), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:36:32,273 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 318.0) internal successors, (2862), 9 states have internal predecessors, (2862), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:36:32,273 INFO L175 Difference]: Start difference. First operand has 40 places, 28 transitions, 103 flow. Second operand 8 states and 959 transitions. [2023-08-27 14:36:32,273 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 80 transitions, 424 flow [2023-08-27 14:36:32,274 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 80 transitions, 378 flow, removed 20 selfloop flow, removed 5 redundant places. [2023-08-27 14:36:32,274 INFO L231 Difference]: Finished difference. Result has 46 places, 40 transitions, 194 flow [2023-08-27 14:36:32,275 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=318, PETRI_DIFFERENCE_MINUEND_FLOW=85, PETRI_DIFFERENCE_MINUEND_PLACES=33, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=28, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=194, PETRI_PLACES=46, PETRI_TRANSITIONS=40} [2023-08-27 14:36:32,275 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 5 predicate places. [2023-08-27 14:36:32,275 INFO L495 AbstractCegarLoop]: Abstraction has has 46 places, 40 transitions, 194 flow [2023-08-27 14:36:32,276 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 112.0) internal successors, (1120), 10 states have internal predecessors, (1120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:36:32,276 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 14:36:32,276 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] [2023-08-27 14:36:32,292 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 14:36:32,481 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 14:36:32,481 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONASSERT === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 23 more)] === [2023-08-27 14:36:32,481 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 14:36:32,481 INFO L85 PathProgramCache]: Analyzing trace with hash 159448214, now seen corresponding path program 3 times [2023-08-27 14:36:32,481 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 14:36:32,481 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1132440857] [2023-08-27 14:36:32,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 14:36:32,482 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 14:36:32,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 14:36:33,693 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 14:36:33,693 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 14:36:33,693 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1132440857] [2023-08-27 14:36:33,693 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1132440857] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 14:36:33,693 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1905179215] [2023-08-27 14:36:33,693 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-27 14:36:33,693 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 14:36:33,694 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 14:36:33,697 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 14:36:33,720 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 14:36:33,822 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2023-08-27 14:36:33,822 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 14:36:33,823 INFO L262 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 27 conjunts are in the unsatisfiable core [2023-08-27 14:36:33,825 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 14:36:33,965 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 14:36:33,965 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-27 14:36:33,965 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1905179215] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-27 14:36:33,965 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-27 14:36:33,965 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [11] total 17 [2023-08-27 14:36:33,967 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1255125876] [2023-08-27 14:36:33,967 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-27 14:36:33,967 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-08-27 14:36:33,967 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 14:36:33,967 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-08-27 14:36:33,968 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=293, Unknown=0, NotChecked=0, Total=342 [2023-08-27 14:36:33,968 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 117 out of 318 [2023-08-27 14:36:33,969 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 40 transitions, 194 flow. Second operand has 8 states, 8 states have (on average 119.5) internal successors, (956), 8 states have internal predecessors, (956), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:36:33,969 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 14:36:33,969 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 117 of 318 [2023-08-27 14:36:33,969 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 14:36:34,178 INFO L124 PetriNetUnfolderBase]: 247/406 cut-off events. [2023-08-27 14:36:34,178 INFO L125 PetriNetUnfolderBase]: For 866/866 co-relation queries the response was YES. [2023-08-27 14:36:34,179 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1505 conditions, 406 events. 247/406 cut-off events. For 866/866 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 1284 event pairs, 53 based on Foata normal form. 5/411 useless extension candidates. Maximal degree in co-relation 1491. Up to 215 conditions per place. [2023-08-27 14:36:34,181 INFO L140 encePairwiseOnDemand]: 308/318 looper letters, 56 selfloop transitions, 21 changer transitions 13/90 dead transitions. [2023-08-27 14:36:34,181 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 90 transitions, 581 flow [2023-08-27 14:36:34,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-08-27 14:36:34,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-08-27 14:36:34,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1010 transitions. [2023-08-27 14:36:34,183 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3970125786163522 [2023-08-27 14:36:34,183 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1010 transitions. [2023-08-27 14:36:34,183 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1010 transitions. [2023-08-27 14:36:34,184 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 14:36:34,184 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1010 transitions. [2023-08-27 14:36:34,185 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 126.25) internal successors, (1010), 8 states have internal predecessors, (1010), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:36:34,188 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 318.0) internal successors, (2862), 9 states have internal predecessors, (2862), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:36:34,188 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 318.0) internal successors, (2862), 9 states have internal predecessors, (2862), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:36:34,188 INFO L175 Difference]: Start difference. First operand has 46 places, 40 transitions, 194 flow. Second operand 8 states and 1010 transitions. [2023-08-27 14:36:34,188 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 90 transitions, 581 flow [2023-08-27 14:36:34,190 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 90 transitions, 545 flow, removed 18 selfloop flow, removed 1 redundant places. [2023-08-27 14:36:34,191 INFO L231 Difference]: Finished difference. Result has 57 places, 57 transitions, 354 flow [2023-08-27 14:36:34,191 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=318, PETRI_DIFFERENCE_MINUEND_FLOW=176, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=354, PETRI_PLACES=57, PETRI_TRANSITIONS=57} [2023-08-27 14:36:34,191 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 16 predicate places. [2023-08-27 14:36:34,191 INFO L495 AbstractCegarLoop]: Abstraction has has 57 places, 57 transitions, 354 flow [2023-08-27 14:36:34,192 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 119.5) internal successors, (956), 8 states have internal predecessors, (956), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:36:34,192 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 14:36:34,192 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] [2023-08-27 14:36:34,197 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 14:36:34,392 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 14:36:34,392 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONASSERT === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 23 more)] === [2023-08-27 14:36:34,393 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 14:36:34,393 INFO L85 PathProgramCache]: Analyzing trace with hash 1289788470, now seen corresponding path program 4 times [2023-08-27 14:36:34,393 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 14:36:34,393 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [484180130] [2023-08-27 14:36:34,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 14:36:34,393 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 14:36:34,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 14:36:35,175 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 14:36:35,176 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 14:36:35,176 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [484180130] [2023-08-27 14:36:35,176 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [484180130] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 14:36:35,176 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [755736258] [2023-08-27 14:36:35,176 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-27 14:36:35,176 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 14:36:35,176 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 14:36:35,177 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 14:36:35,179 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 14:36:35,268 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-27 14:36:35,268 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 14:36:35,269 INFO L262 TraceCheckSpWp]: Trace formula consists of 250 conjuncts, 42 conjunts are in the unsatisfiable core [2023-08-27 14:36:35,272 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 14:36:35,558 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-27 14:36:35,559 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 33 treesize of output 33 [2023-08-27 14:36:35,655 INFO L322 Elim1Store]: treesize reduction 38, result has 15.6 percent of original size [2023-08-27 14:36:35,656 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 85 treesize of output 41 [2023-08-27 14:36:35,681 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 14:36:35,681 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 14:36:35,940 INFO L322 Elim1Store]: treesize reduction 8, result has 82.2 percent of original size [2023-08-27 14:36:35,941 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 84 treesize of output 87 [2023-08-27 14:36:35,950 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 14:36:35,950 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 7 [2023-08-27 14:36:36,535 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 14:36:36,535 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [755736258] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 14:36:36,535 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 14:36:36,535 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 30 [2023-08-27 14:36:36,535 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1689648904] [2023-08-27 14:36:36,535 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 14:36:36,536 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2023-08-27 14:36:36,536 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 14:36:36,536 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2023-08-27 14:36:36,537 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=874, Unknown=1, NotChecked=0, Total=992 [2023-08-27 14:36:36,538 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 97 out of 318 [2023-08-27 14:36:36,540 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 57 transitions, 354 flow. Second operand has 32 states, 32 states have (on average 98.96875) internal successors, (3167), 32 states have internal predecessors, (3167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:36:36,540 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 14:36:36,540 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 97 of 318 [2023-08-27 14:36:36,540 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 14:36:39,793 INFO L124 PetriNetUnfolderBase]: 599/1063 cut-off events. [2023-08-27 14:36:39,793 INFO L125 PetriNetUnfolderBase]: For 4253/4253 co-relation queries the response was YES. [2023-08-27 14:36:39,795 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4619 conditions, 1063 events. 599/1063 cut-off events. For 4253/4253 co-relation queries the response was YES. Maximal size of possible extension queue 62. Compared 4996 event pairs, 119 based on Foata normal form. 1/1064 useless extension candidates. Maximal degree in co-relation 4594. Up to 391 conditions per place. [2023-08-27 14:36:39,799 INFO L140 encePairwiseOnDemand]: 306/318 looper letters, 203 selfloop transitions, 57 changer transitions 15/275 dead transitions. [2023-08-27 14:36:39,799 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 275 transitions, 1964 flow [2023-08-27 14:36:39,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2023-08-27 14:36:39,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2023-08-27 14:36:39,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 2840 transitions. [2023-08-27 14:36:39,805 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.33077102259492197 [2023-08-27 14:36:39,806 INFO L72 ComplementDD]: Start complementDD. Operand 27 states and 2840 transitions. [2023-08-27 14:36:39,806 INFO L73 IsDeterministic]: Start isDeterministic. Operand 27 states and 2840 transitions. [2023-08-27 14:36:39,807 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 14:36:39,807 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 27 states and 2840 transitions. [2023-08-27 14:36:39,811 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 28 states, 27 states have (on average 105.18518518518519) internal successors, (2840), 27 states have internal predecessors, (2840), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:36:39,819 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 28 states, 28 states have (on average 318.0) internal successors, (8904), 28 states have internal predecessors, (8904), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:36:39,820 INFO L81 ComplementDD]: Finished complementDD. Result has 28 states, 28 states have (on average 318.0) internal successors, (8904), 28 states have internal predecessors, (8904), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:36:39,820 INFO L175 Difference]: Start difference. First operand has 57 places, 57 transitions, 354 flow. Second operand 27 states and 2840 transitions. [2023-08-27 14:36:39,820 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 275 transitions, 1964 flow [2023-08-27 14:36:39,825 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 275 transitions, 1894 flow, removed 35 selfloop flow, removed 1 redundant places. [2023-08-27 14:36:39,828 INFO L231 Difference]: Finished difference. Result has 92 places, 111 transitions, 1058 flow [2023-08-27 14:36:39,828 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=318, PETRI_DIFFERENCE_MINUEND_FLOW=334, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=1058, PETRI_PLACES=92, PETRI_TRANSITIONS=111} [2023-08-27 14:36:39,829 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 51 predicate places. [2023-08-27 14:36:39,829 INFO L495 AbstractCegarLoop]: Abstraction has has 92 places, 111 transitions, 1058 flow [2023-08-27 14:36:39,830 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 98.96875) internal successors, (3167), 32 states have internal predecessors, (3167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:36:39,830 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 14:36:39,830 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] [2023-08-27 14:36:39,837 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2023-08-27 14:36:40,034 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,SelfDestructingSolverStorable10 [2023-08-27 14:36:40,035 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONASSERT === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 23 more)] === [2023-08-27 14:36:40,035 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 14:36:40,035 INFO L85 PathProgramCache]: Analyzing trace with hash 1850932440, now seen corresponding path program 5 times [2023-08-27 14:36:40,035 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 14:36:40,035 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [270941055] [2023-08-27 14:36:40,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 14:36:40,036 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 14:36:40,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 14:36:41,189 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 14:36:41,190 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 14:36:41,190 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [270941055] [2023-08-27 14:36:41,190 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [270941055] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 14:36:41,190 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [876378628] [2023-08-27 14:36:41,190 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-27 14:36:41,190 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 14:36:41,190 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 14:36:41,191 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 14:36:41,194 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 14:36:41,293 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-27 14:36:41,293 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 14:36:41,294 INFO L262 TraceCheckSpWp]: Trace formula consists of 250 conjuncts, 37 conjunts are in the unsatisfiable core [2023-08-27 14:36:41,297 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 14:36:41,588 INFO L322 Elim1Store]: treesize reduction 38, result has 15.6 percent of original size [2023-08-27 14:36:41,588 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 85 treesize of output 41 [2023-08-27 14:36:41,610 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 14:36:41,611 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 14:36:41,780 INFO L322 Elim1Store]: treesize reduction 8, result has 82.2 percent of original size [2023-08-27 14:36:41,780 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 57 treesize of output 60 [2023-08-27 14:36:42,341 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 14:36:42,342 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [876378628] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 14:36:42,342 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 14:36:42,342 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 9] total 29 [2023-08-27 14:36:42,342 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1979273691] [2023-08-27 14:36:42,342 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 14:36:42,342 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2023-08-27 14:36:42,343 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 14:36:42,343 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2023-08-27 14:36:42,343 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=809, Unknown=0, NotChecked=0, Total=930 [2023-08-27 14:36:42,345 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 91 out of 318 [2023-08-27 14:36:42,347 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 111 transitions, 1058 flow. Second operand has 31 states, 31 states have (on average 93.03225806451613) internal successors, (2884), 31 states have internal predecessors, (2884), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:36:42,347 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 14:36:42,347 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 91 of 318 [2023-08-27 14:36:42,347 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 14:36:47,312 INFO L124 PetriNetUnfolderBase]: 833/1567 cut-off events. [2023-08-27 14:36:47,312 INFO L125 PetriNetUnfolderBase]: For 14066/14066 co-relation queries the response was YES. [2023-08-27 14:36:47,316 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8552 conditions, 1567 events. 833/1567 cut-off events. For 14066/14066 co-relation queries the response was YES. Maximal size of possible extension queue 94. Compared 8798 event pairs, 140 based on Foata normal form. 4/1571 useless extension candidates. Maximal degree in co-relation 8515. Up to 391 conditions per place. [2023-08-27 14:36:47,322 INFO L140 encePairwiseOnDemand]: 304/318 looper letters, 215 selfloop transitions, 107 changer transitions 53/375 dead transitions. [2023-08-27 14:36:47,322 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 123 places, 375 transitions, 3431 flow [2023-08-27 14:36:47,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2023-08-27 14:36:47,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2023-08-27 14:36:47,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 3388 transitions. [2023-08-27 14:36:47,328 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3133555308916019 [2023-08-27 14:36:47,328 INFO L72 ComplementDD]: Start complementDD. Operand 34 states and 3388 transitions. [2023-08-27 14:36:47,328 INFO L73 IsDeterministic]: Start isDeterministic. Operand 34 states and 3388 transitions. [2023-08-27 14:36:47,329 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 14:36:47,330 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 34 states and 3388 transitions. [2023-08-27 14:36:47,334 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 35 states, 34 states have (on average 99.6470588235294) internal successors, (3388), 34 states have internal predecessors, (3388), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:36:47,342 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 35 states, 35 states have (on average 318.0) internal successors, (11130), 35 states have internal predecessors, (11130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:36:47,342 INFO L81 ComplementDD]: Finished complementDD. Result has 35 states, 35 states have (on average 318.0) internal successors, (11130), 35 states have internal predecessors, (11130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:36:47,343 INFO L175 Difference]: Start difference. First operand has 92 places, 111 transitions, 1058 flow. Second operand 34 states and 3388 transitions. [2023-08-27 14:36:47,343 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 123 places, 375 transitions, 3431 flow [2023-08-27 14:36:47,363 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 118 places, 375 transitions, 2992 flow, removed 216 selfloop flow, removed 5 redundant places. [2023-08-27 14:36:47,366 INFO L231 Difference]: Finished difference. Result has 139 places, 179 transitions, 1952 flow [2023-08-27 14:36:47,367 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=318, PETRI_DIFFERENCE_MINUEND_FLOW=883, PETRI_DIFFERENCE_MINUEND_PLACES=85, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=111, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=34, PETRI_FLOW=1952, PETRI_PLACES=139, PETRI_TRANSITIONS=179} [2023-08-27 14:36:47,367 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 98 predicate places. [2023-08-27 14:36:47,367 INFO L495 AbstractCegarLoop]: Abstraction has has 139 places, 179 transitions, 1952 flow [2023-08-27 14:36:47,368 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 93.03225806451613) internal successors, (2884), 31 states have internal predecessors, (2884), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:36:47,368 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 14:36:47,368 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] [2023-08-27 14:36:47,389 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2023-08-27 14:36:47,573 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 14:36:47,573 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONASSERT === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 23 more)] === [2023-08-27 14:36:47,573 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 14:36:47,573 INFO L85 PathProgramCache]: Analyzing trace with hash -345065810, now seen corresponding path program 6 times [2023-08-27 14:36:47,573 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 14:36:47,573 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1707425514] [2023-08-27 14:36:47,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 14:36:47,574 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 14:36:47,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 14:36:47,648 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 14:36:47,648 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 14:36:47,648 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1707425514] [2023-08-27 14:36:47,648 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1707425514] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-27 14:36:47,648 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-27 14:36:47,648 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-27 14:36:47,649 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [451382228] [2023-08-27 14:36:47,649 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-27 14:36:47,649 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-27 14:36:47,650 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 14:36:47,650 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-27 14:36:47,650 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-27 14:36:47,651 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 135 out of 318 [2023-08-27 14:36:47,651 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 139 places, 179 transitions, 1952 flow. Second operand has 4 states, 4 states have (on average 140.0) internal successors, (560), 4 states have internal predecessors, (560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:36:47,651 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 14:36:47,651 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 135 of 318 [2023-08-27 14:36:47,651 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 14:36:47,831 INFO L124 PetriNetUnfolderBase]: 634/1141 cut-off events. [2023-08-27 14:36:47,831 INFO L125 PetriNetUnfolderBase]: For 13594/13594 co-relation queries the response was YES. [2023-08-27 14:36:47,835 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6817 conditions, 1141 events. 634/1141 cut-off events. For 13594/13594 co-relation queries the response was YES. Maximal size of possible extension queue 78. Compared 5585 event pairs, 123 based on Foata normal form. 64/1205 useless extension candidates. Maximal degree in co-relation 6760. Up to 514 conditions per place. [2023-08-27 14:36:47,841 INFO L140 encePairwiseOnDemand]: 314/318 looper letters, 119 selfloop transitions, 44 changer transitions 0/163 dead transitions. [2023-08-27 14:36:47,841 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 123 places, 163 transitions, 2062 flow [2023-08-27 14:36:47,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-27 14:36:47,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-27 14:36:47,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 579 transitions. [2023-08-27 14:36:47,842 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.455188679245283 [2023-08-27 14:36:47,843 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 579 transitions. [2023-08-27 14:36:47,843 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 579 transitions. [2023-08-27 14:36:47,843 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 14:36:47,843 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 579 transitions. [2023-08-27 14:36:47,844 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 144.75) internal successors, (579), 4 states have internal predecessors, (579), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:36:47,845 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 318.0) internal successors, (1590), 5 states have internal predecessors, (1590), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:36:47,845 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 318.0) internal successors, (1590), 5 states have internal predecessors, (1590), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:36:47,845 INFO L175 Difference]: Start difference. First operand has 139 places, 179 transitions, 1952 flow. Second operand 4 states and 579 transitions. [2023-08-27 14:36:47,845 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 123 places, 163 transitions, 2062 flow [2023-08-27 14:36:47,876 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 110 places, 163 transitions, 1762 flow, removed 140 selfloop flow, removed 13 redundant places. [2023-08-27 14:36:47,879 INFO L231 Difference]: Finished difference. Result has 111 places, 148 transitions, 1487 flow [2023-08-27 14:36:47,879 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=318, PETRI_DIFFERENCE_MINUEND_FLOW=1346, PETRI_DIFFERENCE_MINUEND_PLACES=107, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=148, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=104, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=1487, PETRI_PLACES=111, PETRI_TRANSITIONS=148} [2023-08-27 14:36:47,880 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 70 predicate places. [2023-08-27 14:36:47,880 INFO L495 AbstractCegarLoop]: Abstraction has has 111 places, 148 transitions, 1487 flow [2023-08-27 14:36:47,880 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 140.0) internal successors, (560), 4 states have internal predecessors, (560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:36:47,880 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 14:36:47,880 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] [2023-08-27 14:36:47,880 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-08-27 14:36:47,881 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONASSERT === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 23 more)] === [2023-08-27 14:36:47,881 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 14:36:47,881 INFO L85 PathProgramCache]: Analyzing trace with hash 1868730978, now seen corresponding path program 7 times [2023-08-27 14:36:47,881 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 14:36:47,881 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [786536571] [2023-08-27 14:36:47,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 14:36:47,881 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 14:36:47,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 14:36:48,681 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 14:36:48,681 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 14:36:48,681 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [786536571] [2023-08-27 14:36:48,681 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [786536571] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 14:36:48,681 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1933736324] [2023-08-27 14:36:48,681 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-27 14:36:48,681 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 14:36:48,681 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 14:36:48,709 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 14:36:48,736 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 14:36:48,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 14:36:48,810 INFO L262 TraceCheckSpWp]: Trace formula consists of 250 conjuncts, 37 conjunts are in the unsatisfiable core [2023-08-27 14:36:48,811 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 14:36:49,056 INFO L322 Elim1Store]: treesize reduction 38, result has 15.6 percent of original size [2023-08-27 14:36:49,056 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 85 treesize of output 41 [2023-08-27 14:36:49,081 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 14:36:49,081 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 14:36:49,284 INFO L322 Elim1Store]: treesize reduction 8, result has 82.2 percent of original size [2023-08-27 14:36:49,284 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 55 treesize of output 58 [2023-08-27 14:36:49,684 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 14:36:49,684 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1933736324] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 14:36:49,685 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 14:36:49,685 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 28 [2023-08-27 14:36:49,685 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [437644714] [2023-08-27 14:36:49,685 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 14:36:49,685 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2023-08-27 14:36:49,685 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 14:36:49,686 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2023-08-27 14:36:49,686 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=757, Unknown=0, NotChecked=0, Total=870 [2023-08-27 14:36:49,687 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 101 out of 318 [2023-08-27 14:36:49,688 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 111 places, 148 transitions, 1487 flow. Second operand has 30 states, 30 states have (on average 103.1) internal successors, (3093), 30 states have internal predecessors, (3093), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:36:49,688 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 14:36:49,688 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 101 of 318 [2023-08-27 14:36:49,689 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 14:36:51,542 INFO L124 PetriNetUnfolderBase]: 790/1526 cut-off events. [2023-08-27 14:36:51,543 INFO L125 PetriNetUnfolderBase]: For 10513/10513 co-relation queries the response was YES. [2023-08-27 14:36:51,546 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8207 conditions, 1526 events. 790/1526 cut-off events. For 10513/10513 co-relation queries the response was YES. Maximal size of possible extension queue 101. Compared 8802 event pairs, 110 based on Foata normal form. 1/1527 useless extension candidates. Maximal degree in co-relation 8158. Up to 353 conditions per place. [2023-08-27 14:36:51,551 INFO L140 encePairwiseOnDemand]: 304/318 looper letters, 173 selfloop transitions, 122 changer transitions 13/308 dead transitions. [2023-08-27 14:36:51,551 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 132 places, 308 transitions, 3112 flow [2023-08-27 14:36:51,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-08-27 14:36:51,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2023-08-27 14:36:51,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 2401 transitions. [2023-08-27 14:36:51,554 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3431961120640366 [2023-08-27 14:36:51,554 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 2401 transitions. [2023-08-27 14:36:51,554 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 2401 transitions. [2023-08-27 14:36:51,554 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 14:36:51,554 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 2401 transitions. [2023-08-27 14:36:51,557 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 23 states, 22 states have (on average 109.13636363636364) internal successors, (2401), 22 states have internal predecessors, (2401), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:36:51,561 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 23 states, 23 states have (on average 318.0) internal successors, (7314), 23 states have internal predecessors, (7314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:36:51,562 INFO L81 ComplementDD]: Finished complementDD. Result has 23 states, 23 states have (on average 318.0) internal successors, (7314), 23 states have internal predecessors, (7314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:36:51,562 INFO L175 Difference]: Start difference. First operand has 111 places, 148 transitions, 1487 flow. Second operand 22 states and 2401 transitions. [2023-08-27 14:36:51,562 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 132 places, 308 transitions, 3112 flow [2023-08-27 14:36:51,587 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 127 places, 308 transitions, 2994 flow, removed 15 selfloop flow, removed 5 redundant places. [2023-08-27 14:36:51,590 INFO L231 Difference]: Finished difference. Result has 134 places, 200 transitions, 2334 flow [2023-08-27 14:36:51,590 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=318, PETRI_DIFFERENCE_MINUEND_FLOW=1407, PETRI_DIFFERENCE_MINUEND_PLACES=106, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=148, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=76, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=2334, PETRI_PLACES=134, PETRI_TRANSITIONS=200} [2023-08-27 14:36:51,590 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 93 predicate places. [2023-08-27 14:36:51,590 INFO L495 AbstractCegarLoop]: Abstraction has has 134 places, 200 transitions, 2334 flow [2023-08-27 14:36:51,591 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 103.1) internal successors, (3093), 30 states have internal predecessors, (3093), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:36:51,591 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 14:36:51,591 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] [2023-08-27 14:36:51,596 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2023-08-27 14:36:51,796 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,SelfDestructingSolverStorable13 [2023-08-27 14:36:51,796 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONASSERT === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 23 more)] === [2023-08-27 14:36:51,796 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 14:36:51,796 INFO L85 PathProgramCache]: Analyzing trace with hash 1427038620, now seen corresponding path program 8 times [2023-08-27 14:36:51,796 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 14:36:51,796 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [581685606] [2023-08-27 14:36:51,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 14:36:51,797 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 14:36:51,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 14:36:52,514 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 14:36:52,514 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 14:36:52,514 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [581685606] [2023-08-27 14:36:52,514 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [581685606] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 14:36:52,514 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [902499258] [2023-08-27 14:36:52,514 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-27 14:36:52,514 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 14:36:52,514 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 14:36:52,515 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 14:36:52,516 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 14:36:52,643 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-08-27 14:36:52,643 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 14:36:52,645 INFO L262 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 27 conjunts are in the unsatisfiable core [2023-08-27 14:36:52,646 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 14:36:52,750 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 14:36:52,751 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-27 14:36:52,751 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [902499258] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-27 14:36:52,751 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-27 14:36:52,751 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [10] total 16 [2023-08-27 14:36:52,751 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1234447738] [2023-08-27 14:36:52,751 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-27 14:36:52,751 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-08-27 14:36:52,751 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 14:36:52,752 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-08-27 14:36:52,752 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=262, Unknown=0, NotChecked=0, Total=306 [2023-08-27 14:36:52,752 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 117 out of 318 [2023-08-27 14:36:52,753 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 134 places, 200 transitions, 2334 flow. Second operand has 8 states, 8 states have (on average 119.5) internal successors, (956), 8 states have internal predecessors, (956), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:36:52,753 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 14:36:52,753 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 117 of 318 [2023-08-27 14:36:52,753 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 14:36:53,059 INFO L124 PetriNetUnfolderBase]: 818/1577 cut-off events. [2023-08-27 14:36:53,060 INFO L125 PetriNetUnfolderBase]: For 12274/12274 co-relation queries the response was YES. [2023-08-27 14:36:53,064 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9230 conditions, 1577 events. 818/1577 cut-off events. For 12274/12274 co-relation queries the response was YES. Maximal size of possible extension queue 103. Compared 9052 event pairs, 154 based on Foata normal form. 2/1579 useless extension candidates. Maximal degree in co-relation 9177. Up to 1219 conditions per place. [2023-08-27 14:36:53,070 INFO L140 encePairwiseOnDemand]: 308/318 looper letters, 183 selfloop transitions, 48 changer transitions 14/245 dead transitions. [2023-08-27 14:36:53,070 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 140 places, 245 transitions, 3126 flow [2023-08-27 14:36:53,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-08-27 14:36:53,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-08-27 14:36:53,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1008 transitions. [2023-08-27 14:36:53,071 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39622641509433965 [2023-08-27 14:36:53,071 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1008 transitions. [2023-08-27 14:36:53,071 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1008 transitions. [2023-08-27 14:36:53,072 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 14:36:53,072 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1008 transitions. [2023-08-27 14:36:53,073 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 126.0) internal successors, (1008), 8 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 14:36:53,074 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 318.0) internal successors, (2862), 9 states have internal predecessors, (2862), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:36:53,075 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 318.0) internal successors, (2862), 9 states have internal predecessors, (2862), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:36:53,075 INFO L175 Difference]: Start difference. First operand has 134 places, 200 transitions, 2334 flow. Second operand 8 states and 1008 transitions. [2023-08-27 14:36:53,075 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 140 places, 245 transitions, 3126 flow [2023-08-27 14:36:53,115 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 135 places, 245 transitions, 2932 flow, removed 89 selfloop flow, removed 5 redundant places. [2023-08-27 14:36:53,118 INFO L231 Difference]: Finished difference. Result has 138 places, 209 transitions, 2384 flow [2023-08-27 14:36:53,118 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=318, PETRI_DIFFERENCE_MINUEND_FLOW=2152, PETRI_DIFFERENCE_MINUEND_PLACES=128, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=200, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=153, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2384, PETRI_PLACES=138, PETRI_TRANSITIONS=209} [2023-08-27 14:36:53,118 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 97 predicate places. [2023-08-27 14:36:53,118 INFO L495 AbstractCegarLoop]: Abstraction has has 138 places, 209 transitions, 2384 flow [2023-08-27 14:36:53,119 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 119.5) internal successors, (956), 8 states have internal predecessors, (956), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:36:53,119 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 14:36:53,119 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] [2023-08-27 14:36:53,124 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 14:36:53,324 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,SelfDestructingSolverStorable14 [2023-08-27 14:36:53,324 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONASSERT === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 23 more)] === [2023-08-27 14:36:53,324 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 14:36:53,324 INFO L85 PathProgramCache]: Analyzing trace with hash -1389186426, now seen corresponding path program 9 times [2023-08-27 14:36:53,324 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 14:36:53,324 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1407715252] [2023-08-27 14:36:53,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 14:36:53,324 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 14:36:53,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 14:36:54,299 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 14:36:54,299 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 14:36:54,299 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1407715252] [2023-08-27 14:36:54,299 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1407715252] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 14:36:54,299 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1721684093] [2023-08-27 14:36:54,299 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-27 14:36:54,300 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 14:36:54,300 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 14:36:54,300 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 14:36:54,302 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 14:36:54,441 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2023-08-27 14:36:54,441 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 14:36:54,442 INFO L262 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 34 conjunts are in the unsatisfiable core [2023-08-27 14:36:54,443 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 14:36:54,566 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-27 14:36:54,566 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 22 [2023-08-27 14:36:54,652 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 14:36:54,652 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-27 14:36:54,652 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1721684093] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-27 14:36:54,652 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-27 14:36:54,652 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [11] total 19 [2023-08-27 14:36:54,652 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1291295039] [2023-08-27 14:36:54,652 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-27 14:36:54,653 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-08-27 14:36:54,653 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 14:36:54,653 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-08-27 14:36:54,653 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=370, Unknown=0, NotChecked=0, Total=420 [2023-08-27 14:36:54,653 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 110 out of 318 [2023-08-27 14:36:54,654 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 138 places, 209 transitions, 2384 flow. Second operand has 10 states, 10 states have (on average 112.0) internal successors, (1120), 10 states have internal predecessors, (1120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:36:54,654 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 14:36:54,654 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 110 of 318 [2023-08-27 14:36:54,654 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 14:36:54,993 INFO L124 PetriNetUnfolderBase]: 840/1630 cut-off events. [2023-08-27 14:36:54,993 INFO L125 PetriNetUnfolderBase]: For 12198/12198 co-relation queries the response was YES. [2023-08-27 14:36:54,997 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9468 conditions, 1630 events. 840/1630 cut-off events. For 12198/12198 co-relation queries the response was YES. Maximal size of possible extension queue 112. Compared 9579 event pairs, 150 based on Foata normal form. 2/1632 useless extension candidates. Maximal degree in co-relation 9413. Up to 1161 conditions per place. [2023-08-27 14:36:55,002 INFO L140 encePairwiseOnDemand]: 308/318 looper letters, 189 selfloop transitions, 50 changer transitions 16/255 dead transitions. [2023-08-27 14:36:55,002 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 144 places, 255 transitions, 3230 flow [2023-08-27 14:36:55,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-08-27 14:36:55,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-08-27 14:36:55,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 947 transitions. [2023-08-27 14:36:55,004 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37224842767295596 [2023-08-27 14:36:55,004 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 947 transitions. [2023-08-27 14:36:55,004 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 947 transitions. [2023-08-27 14:36:55,004 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 14:36:55,004 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 947 transitions. [2023-08-27 14:36:55,005 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 118.375) internal successors, (947), 8 states have internal predecessors, (947), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:36:55,006 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 318.0) internal successors, (2862), 9 states have internal predecessors, (2862), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:36:55,006 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 318.0) internal successors, (2862), 9 states have internal predecessors, (2862), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:36:55,007 INFO L175 Difference]: Start difference. First operand has 138 places, 209 transitions, 2384 flow. Second operand 8 states and 947 transitions. [2023-08-27 14:36:55,007 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 144 places, 255 transitions, 3230 flow [2023-08-27 14:36:55,037 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 139 places, 255 transitions, 3130 flow, removed 12 selfloop flow, removed 5 redundant places. [2023-08-27 14:36:55,040 INFO L231 Difference]: Finished difference. Result has 143 places, 216 transitions, 2515 flow [2023-08-27 14:36:55,040 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=318, PETRI_DIFFERENCE_MINUEND_FLOW=2285, PETRI_DIFFERENCE_MINUEND_PLACES=132, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=209, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=160, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2515, PETRI_PLACES=143, PETRI_TRANSITIONS=216} [2023-08-27 14:36:55,041 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 102 predicate places. [2023-08-27 14:36:55,041 INFO L495 AbstractCegarLoop]: Abstraction has has 143 places, 216 transitions, 2515 flow [2023-08-27 14:36:55,041 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 112.0) internal successors, (1120), 10 states have internal predecessors, (1120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:36:55,041 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 14:36:55,041 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] [2023-08-27 14:36:55,048 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-08-27 14:36:55,246 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,SelfDestructingSolverStorable15 [2023-08-27 14:36:55,246 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONASSERT === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 23 more)] === [2023-08-27 14:36:55,247 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 14:36:55,247 INFO L85 PathProgramCache]: Analyzing trace with hash -1444810058, now seen corresponding path program 10 times [2023-08-27 14:36:55,247 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 14:36:55,247 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [174242796] [2023-08-27 14:36:55,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 14:36:55,247 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 14:36:55,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 14:36:55,865 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 14:36:55,865 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 14:36:55,865 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [174242796] [2023-08-27 14:36:55,865 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [174242796] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 14:36:55,865 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1257870885] [2023-08-27 14:36:55,865 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-27 14:36:55,865 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 14:36:55,865 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 14:36:55,866 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 14:36:55,867 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 14:36:55,960 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-27 14:36:55,960 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 14:36:55,962 INFO L262 TraceCheckSpWp]: Trace formula consists of 250 conjuncts, 49 conjunts are in the unsatisfiable core [2023-08-27 14:36:55,963 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 14:36:56,215 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-27 14:36:56,216 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 31 treesize of output 31 [2023-08-27 14:36:56,310 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 14:36:56,311 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 14:36:56,542 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 14:36:56,542 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 85 treesize of output 87 [2023-08-27 14:36:56,546 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 14:36:56,546 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 7 [2023-08-27 14:36:56,845 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 14:36:56,846 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1257870885] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 14:36:56,846 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 14:36:56,846 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 30 [2023-08-27 14:36:56,846 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [27556903] [2023-08-27 14:36:56,846 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 14:36:56,846 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2023-08-27 14:36:56,847 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 14:36:56,847 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2023-08-27 14:36:56,847 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=872, Unknown=1, NotChecked=0, Total=992 [2023-08-27 14:36:56,848 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 97 out of 318 [2023-08-27 14:36:56,849 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 143 places, 216 transitions, 2515 flow. Second operand has 32 states, 32 states have (on average 98.96875) internal successors, (3167), 32 states have internal predecessors, (3167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:36:56,850 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 14:36:56,850 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 97 of 318 [2023-08-27 14:36:56,850 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 14:36:58,992 INFO L124 PetriNetUnfolderBase]: 1081/2012 cut-off events. [2023-08-27 14:36:58,992 INFO L125 PetriNetUnfolderBase]: For 16630/16630 co-relation queries the response was YES. [2023-08-27 14:36:58,998 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12056 conditions, 2012 events. 1081/2012 cut-off events. For 16630/16630 co-relation queries the response was YES. Maximal size of possible extension queue 127. Compared 11876 event pairs, 154 based on Foata normal form. 2/2014 useless extension candidates. Maximal degree in co-relation 11998. Up to 483 conditions per place. [2023-08-27 14:36:59,004 INFO L140 encePairwiseOnDemand]: 305/318 looper letters, 227 selfloop transitions, 124 changer transitions 36/387 dead transitions. [2023-08-27 14:36:59,004 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 170 places, 387 transitions, 4437 flow [2023-08-27 14:36:59,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2023-08-27 14:36:59,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2023-08-27 14:36:59,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 3017 transitions. [2023-08-27 14:36:59,007 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3271524615050965 [2023-08-27 14:36:59,007 INFO L72 ComplementDD]: Start complementDD. Operand 29 states and 3017 transitions. [2023-08-27 14:36:59,007 INFO L73 IsDeterministic]: Start isDeterministic. Operand 29 states and 3017 transitions. [2023-08-27 14:36:59,007 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 14:36:59,007 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 29 states and 3017 transitions. [2023-08-27 14:36:59,010 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 30 states, 29 states have (on average 104.03448275862068) internal successors, (3017), 29 states have internal predecessors, (3017), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:36:59,015 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 30 states, 30 states have (on average 318.0) internal successors, (9540), 30 states have internal predecessors, (9540), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:36:59,015 INFO L81 ComplementDD]: Finished complementDD. Result has 30 states, 30 states have (on average 318.0) internal successors, (9540), 30 states have internal predecessors, (9540), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:36:59,015 INFO L175 Difference]: Start difference. First operand has 143 places, 216 transitions, 2515 flow. Second operand 29 states and 3017 transitions. [2023-08-27 14:36:59,015 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 170 places, 387 transitions, 4437 flow [2023-08-27 14:36:59,059 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 166 places, 387 transitions, 4274 flow, removed 36 selfloop flow, removed 4 redundant places. [2023-08-27 14:36:59,063 INFO L231 Difference]: Finished difference. Result has 177 places, 253 transitions, 3195 flow [2023-08-27 14:36:59,063 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=318, PETRI_DIFFERENCE_MINUEND_FLOW=2410, PETRI_DIFFERENCE_MINUEND_PLACES=138, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=216, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=88, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=101, PETRI_DIFFERENCE_SUBTRAHEND_STATES=29, PETRI_FLOW=3195, PETRI_PLACES=177, PETRI_TRANSITIONS=253} [2023-08-27 14:36:59,064 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 136 predicate places. [2023-08-27 14:36:59,064 INFO L495 AbstractCegarLoop]: Abstraction has has 177 places, 253 transitions, 3195 flow [2023-08-27 14:36:59,064 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 98.96875) internal successors, (3167), 32 states have internal predecessors, (3167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:36:59,064 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 14:36:59,064 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] [2023-08-27 14:36:59,071 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 14:36:59,269 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,SelfDestructingSolverStorable16 [2023-08-27 14:36:59,269 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONASSERT === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 23 more)] === [2023-08-27 14:36:59,269 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 14:36:59,269 INFO L85 PathProgramCache]: Analyzing trace with hash -932914768, now seen corresponding path program 11 times [2023-08-27 14:36:59,269 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 14:36:59,269 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [312973648] [2023-08-27 14:36:59,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 14:36:59,270 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 14:36:59,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 14:37:00,023 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 14:37:00,023 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 14:37:00,023 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [312973648] [2023-08-27 14:37:00,023 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [312973648] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 14:37:00,023 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [618742963] [2023-08-27 14:37:00,023 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-27 14:37:00,023 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 14:37:00,023 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 14:37:00,024 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 14:37:00,027 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 14:37:00,121 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-27 14:37:00,122 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 14:37:00,123 INFO L262 TraceCheckSpWp]: Trace formula consists of 250 conjuncts, 42 conjunts are in the unsatisfiable core [2023-08-27 14:37:00,124 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 14:37:00,298 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-27 14:37:00,299 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 22 [2023-08-27 14:37:00,402 INFO L322 Elim1Store]: treesize reduction 38, result has 15.6 percent of original size [2023-08-27 14:37:00,403 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 85 treesize of output 41 [2023-08-27 14:37:00,425 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 14:37:00,425 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 14:37:00,647 INFO L322 Elim1Store]: treesize reduction 8, result has 82.2 percent of original size [2023-08-27 14:37:00,648 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 110 treesize of output 113 [2023-08-27 14:37:00,664 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 14:37:00,664 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 57 treesize of output 56 [2023-08-27 14:37:01,388 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 14:37:01,388 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [618742963] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 14:37:01,388 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 14:37:01,388 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 30 [2023-08-27 14:37:01,389 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1413324189] [2023-08-27 14:37:01,389 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 14:37:01,389 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2023-08-27 14:37:01,389 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 14:37:01,389 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2023-08-27 14:37:01,390 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=869, Unknown=1, NotChecked=0, Total=992 [2023-08-27 14:37:01,391 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 97 out of 318 [2023-08-27 14:37:01,392 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 177 places, 253 transitions, 3195 flow. Second operand has 32 states, 32 states have (on average 98.96875) internal successors, (3167), 32 states have internal predecessors, (3167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:37:01,392 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 14:37:01,392 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 97 of 318 [2023-08-27 14:37:01,392 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 14:37:03,649 INFO L124 PetriNetUnfolderBase]: 1136/2102 cut-off events. [2023-08-27 14:37:03,649 INFO L125 PetriNetUnfolderBase]: For 19861/19861 co-relation queries the response was YES. [2023-08-27 14:37:03,655 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13306 conditions, 2102 events. 1136/2102 cut-off events. For 19861/19861 co-relation queries the response was YES. Maximal size of possible extension queue 135. Compared 12409 event pairs, 222 based on Foata normal form. 3/2105 useless extension candidates. Maximal degree in co-relation 13242. Up to 758 conditions per place. [2023-08-27 14:37:03,660 INFO L140 encePairwiseOnDemand]: 305/318 looper letters, 242 selfloop transitions, 98 changer transitions 22/362 dead transitions. [2023-08-27 14:37:03,660 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 189 places, 362 transitions, 4570 flow [2023-08-27 14:37:03,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-08-27 14:37:03,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2023-08-27 14:37:03,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 2006 transitions. [2023-08-27 14:37:03,662 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.33200926845415424 [2023-08-27 14:37:03,663 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 2006 transitions. [2023-08-27 14:37:03,663 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 2006 transitions. [2023-08-27 14:37:03,663 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 14:37:03,663 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 2006 transitions. [2023-08-27 14:37:03,665 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 105.57894736842105) internal successors, (2006), 19 states have internal predecessors, (2006), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:37:03,669 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 318.0) internal successors, (6360), 20 states have internal predecessors, (6360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:37:03,670 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 318.0) internal successors, (6360), 20 states have internal predecessors, (6360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:37:03,670 INFO L175 Difference]: Start difference. First operand has 177 places, 253 transitions, 3195 flow. Second operand 19 states and 2006 transitions. [2023-08-27 14:37:03,670 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 189 places, 362 transitions, 4570 flow [2023-08-27 14:37:03,719 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 176 places, 362 transitions, 4403 flow, removed 66 selfloop flow, removed 13 redundant places. [2023-08-27 14:37:03,722 INFO L231 Difference]: Finished difference. Result has 181 places, 259 transitions, 3411 flow [2023-08-27 14:37:03,723 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=318, PETRI_DIFFERENCE_MINUEND_FLOW=3044, PETRI_DIFFERENCE_MINUEND_PLACES=158, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=253, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=82, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=163, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=3411, PETRI_PLACES=181, PETRI_TRANSITIONS=259} [2023-08-27 14:37:03,723 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 140 predicate places. [2023-08-27 14:37:03,723 INFO L495 AbstractCegarLoop]: Abstraction has has 181 places, 259 transitions, 3411 flow [2023-08-27 14:37:03,724 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 98.96875) internal successors, (3167), 32 states have internal predecessors, (3167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:37:03,724 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 14:37:03,724 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 14:37:03,736 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 14:37:03,932 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 14:37:03,933 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONASSERT === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 23 more)] === [2023-08-27 14:37:03,933 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 14:37:03,933 INFO L85 PathProgramCache]: Analyzing trace with hash 743332659, now seen corresponding path program 12 times [2023-08-27 14:37:03,933 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 14:37:03,933 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2136221402] [2023-08-27 14:37:03,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 14:37:03,933 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 14:37:03,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 14:37:05,261 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 14:37:05,261 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 14:37:05,262 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2136221402] [2023-08-27 14:37:05,262 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2136221402] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 14:37:05,262 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1282177446] [2023-08-27 14:37:05,262 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-27 14:37:05,262 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 14:37:05,262 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 14:37:05,263 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 14:37:05,263 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 14:37:05,378 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 1 check-sat command(s) [2023-08-27 14:37:05,378 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 14:37:05,379 INFO L262 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 34 conjunts are in the unsatisfiable core [2023-08-27 14:37:05,381 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 14:37:05,537 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-27 14:37:05,538 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 34 [2023-08-27 14:37:05,597 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-27 14:37:05,597 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-27 14:37:05,597 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1282177446] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-27 14:37:05,597 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-27 14:37:05,597 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [12] total 20 [2023-08-27 14:37:05,597 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [745667422] [2023-08-27 14:37:05,597 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-27 14:37:05,597 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-08-27 14:37:05,597 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 14:37:05,598 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-08-27 14:37:05,598 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=411, Unknown=0, NotChecked=0, Total=462 [2023-08-27 14:37:05,598 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 110 out of 318 [2023-08-27 14:37:05,599 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 181 places, 259 transitions, 3411 flow. Second operand has 10 states, 10 states have (on average 112.0) internal successors, (1120), 10 states have internal predecessors, (1120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:37:05,599 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 14:37:05,599 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 110 of 318 [2023-08-27 14:37:05,599 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 14:37:06,037 INFO L124 PetriNetUnfolderBase]: 1107/2022 cut-off events. [2023-08-27 14:37:06,037 INFO L125 PetriNetUnfolderBase]: For 21712/21712 co-relation queries the response was YES. [2023-08-27 14:37:06,043 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13360 conditions, 2022 events. 1107/2022 cut-off events. For 21712/21712 co-relation queries the response was YES. Maximal size of possible extension queue 130. Compared 11636 event pairs, 145 based on Foata normal form. 1/2022 useless extension candidates. Maximal degree in co-relation 13294. Up to 1257 conditions per place. [2023-08-27 14:37:06,048 INFO L140 encePairwiseOnDemand]: 308/318 looper letters, 223 selfloop transitions, 67 changer transitions 16/306 dead transitions. [2023-08-27 14:37:06,049 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 186 places, 306 transitions, 4371 flow [2023-08-27 14:37:06,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-08-27 14:37:06,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-08-27 14:37:06,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 955 transitions. [2023-08-27 14:37:06,053 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3753930817610063 [2023-08-27 14:37:06,054 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 955 transitions. [2023-08-27 14:37:06,054 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 955 transitions. [2023-08-27 14:37:06,054 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 14:37:06,054 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 955 transitions. [2023-08-27 14:37:06,055 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 119.375) internal successors, (955), 8 states have internal predecessors, (955), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:37:06,056 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 318.0) internal successors, (2862), 9 states have internal predecessors, (2862), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:37:06,056 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 318.0) internal successors, (2862), 9 states have internal predecessors, (2862), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:37:06,056 INFO L175 Difference]: Start difference. First operand has 181 places, 259 transitions, 3411 flow. Second operand 8 states and 955 transitions. [2023-08-27 14:37:06,056 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 186 places, 306 transitions, 4371 flow [2023-08-27 14:37:06,114 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 180 places, 306 transitions, 4288 flow, removed 19 selfloop flow, removed 6 redundant places. [2023-08-27 14:37:06,118 INFO L231 Difference]: Finished difference. Result has 182 places, 256 transitions, 3438 flow [2023-08-27 14:37:06,118 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=318, PETRI_DIFFERENCE_MINUEND_FLOW=3330, PETRI_DIFFERENCE_MINUEND_PLACES=173, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=259, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=67, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=192, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3438, PETRI_PLACES=182, PETRI_TRANSITIONS=256} [2023-08-27 14:37:06,118 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 141 predicate places. [2023-08-27 14:37:06,118 INFO L495 AbstractCegarLoop]: Abstraction has has 182 places, 256 transitions, 3438 flow [2023-08-27 14:37:06,118 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 112.0) internal successors, (1120), 10 states have internal predecessors, (1120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:37:06,118 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 14:37:06,118 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] [2023-08-27 14:37:06,125 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 14:37:06,323 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 14:37:06,324 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONASSERT === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 23 more)] === [2023-08-27 14:37:06,324 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 14:37:06,324 INFO L85 PathProgramCache]: Analyzing trace with hash 221538223, now seen corresponding path program 1 times [2023-08-27 14:37:06,324 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 14:37:06,324 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1115653095] [2023-08-27 14:37:06,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 14:37:06,324 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 14:37:06,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 14:37:06,388 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 14:37:06,388 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 14:37:06,388 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1115653095] [2023-08-27 14:37:06,388 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1115653095] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 14:37:06,388 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [508988720] [2023-08-27 14:37:06,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 14:37:06,388 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 14:37:06,388 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 14:37:06,393 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 14:37:06,395 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 14:37:06,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 14:37:06,505 INFO L262 TraceCheckSpWp]: Trace formula consists of 255 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-27 14:37:06,508 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 14:37:06,523 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 14:37:06,523 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 14:37:06,547 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-27 14:37:06,548 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [508988720] provided 1 perfect and 1 imperfect interpolant sequences [2023-08-27 14:37:06,548 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-08-27 14:37:06,548 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5, 5] total 6 [2023-08-27 14:37:06,548 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [60206566] [2023-08-27 14:37:06,548 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-27 14:37:06,548 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-27 14:37:06,548 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 14:37:06,548 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-27 14:37:06,549 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2023-08-27 14:37:06,549 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 135 out of 318 [2023-08-27 14:37:06,549 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 182 places, 256 transitions, 3438 flow. Second operand has 4 states, 4 states have (on average 140.25) internal successors, (561), 4 states have internal predecessors, (561), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:37:06,549 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 14:37:06,549 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 135 of 318 [2023-08-27 14:37:06,549 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 14:37:06,833 INFO L124 PetriNetUnfolderBase]: 1183/2148 cut-off events. [2023-08-27 14:37:06,834 INFO L125 PetriNetUnfolderBase]: For 25822/25822 co-relation queries the response was YES. [2023-08-27 14:37:06,841 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14562 conditions, 2148 events. 1183/2148 cut-off events. For 25822/25822 co-relation queries the response was YES. Maximal size of possible extension queue 145. Compared 12398 event pairs, 164 based on Foata normal form. 47/2194 useless extension candidates. Maximal degree in co-relation 14496. Up to 1517 conditions per place. [2023-08-27 14:37:06,848 INFO L140 encePairwiseOnDemand]: 314/318 looper letters, 263 selfloop transitions, 53 changer transitions 0/316 dead transitions. [2023-08-27 14:37:06,848 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 182 places, 316 transitions, 4748 flow [2023-08-27 14:37:06,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-27 14:37:06,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-27 14:37:06,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 589 transitions. [2023-08-27 14:37:06,849 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4630503144654088 [2023-08-27 14:37:06,849 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 589 transitions. [2023-08-27 14:37:06,849 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 589 transitions. [2023-08-27 14:37:06,849 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 14:37:06,849 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 589 transitions. [2023-08-27 14:37:06,850 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 147.25) internal successors, (589), 4 states have internal predecessors, (589), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:37:06,851 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 318.0) internal successors, (1590), 5 states have internal predecessors, (1590), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:37:06,851 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 318.0) internal successors, (1590), 5 states have internal predecessors, (1590), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:37:06,851 INFO L175 Difference]: Start difference. First operand has 182 places, 256 transitions, 3438 flow. Second operand 4 states and 589 transitions. [2023-08-27 14:37:06,851 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 182 places, 316 transitions, 4748 flow [2023-08-27 14:37:06,917 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 174 places, 316 transitions, 4563 flow, removed 22 selfloop flow, removed 8 redundant places. [2023-08-27 14:37:06,921 INFO L231 Difference]: Finished difference. Result has 177 places, 268 transitions, 3672 flow [2023-08-27 14:37:06,921 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=318, PETRI_DIFFERENCE_MINUEND_FLOW=3213, PETRI_DIFFERENCE_MINUEND_PLACES=171, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=251, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=202, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=3672, PETRI_PLACES=177, PETRI_TRANSITIONS=268} [2023-08-27 14:37:06,922 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 136 predicate places. [2023-08-27 14:37:06,922 INFO L495 AbstractCegarLoop]: Abstraction has has 177 places, 268 transitions, 3672 flow [2023-08-27 14:37:06,922 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 140.25) internal successors, (561), 4 states have internal predecessors, (561), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:37:06,922 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 14:37:06,922 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 14:37:06,927 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 14:37:07,126 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 14:37:07,127 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONASSERT === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 23 more)] === [2023-08-27 14:37:07,127 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 14:37:07,127 INFO L85 PathProgramCache]: Analyzing trace with hash 1690646045, now seen corresponding path program 13 times [2023-08-27 14:37:07,127 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 14:37:07,127 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [218073274] [2023-08-27 14:37:07,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 14:37:07,127 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 14:37:07,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 14:37:09,089 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 14:37:09,090 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 14:37:09,090 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [218073274] [2023-08-27 14:37:09,090 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [218073274] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 14:37:09,090 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1181387763] [2023-08-27 14:37:09,090 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-27 14:37:09,090 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 14:37:09,090 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 14:37:09,091 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 14:37:09,091 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 14:37:09,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 14:37:09,195 INFO L262 TraceCheckSpWp]: Trace formula consists of 261 conjuncts, 35 conjunts are in the unsatisfiable core [2023-08-27 14:37:09,195 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 14:37:09,404 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-27 14:37:09,404 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 14:37:09,523 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 14:37:09,524 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 58 treesize of output 60 [2023-08-27 14:37:09,655 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-27 14:37:09,655 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1181387763] provided 1 perfect and 1 imperfect interpolant sequences [2023-08-27 14:37:09,656 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-08-27 14:37:09,656 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [12, 8] total 25 [2023-08-27 14:37:09,656 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1663320025] [2023-08-27 14:37:09,656 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-27 14:37:09,656 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-08-27 14:37:09,656 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 14:37:09,656 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-08-27 14:37:09,657 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=627, Unknown=0, NotChecked=0, Total=702 [2023-08-27 14:37:09,657 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 117 out of 318 [2023-08-27 14:37:09,657 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 177 places, 268 transitions, 3672 flow. Second operand has 8 states, 8 states have (on average 119.5) internal successors, (956), 8 states have internal predecessors, (956), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:37:09,658 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 14:37:09,658 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 117 of 318 [2023-08-27 14:37:09,658 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 14:37:10,103 INFO L124 PetriNetUnfolderBase]: 1234/2253 cut-off events. [2023-08-27 14:37:10,103 INFO L125 PetriNetUnfolderBase]: For 28908/28908 co-relation queries the response was YES. [2023-08-27 14:37:10,111 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15645 conditions, 2253 events. 1234/2253 cut-off events. For 28908/28908 co-relation queries the response was YES. Maximal size of possible extension queue 147. Compared 13310 event pairs, 162 based on Foata normal form. 1/2253 useless extension candidates. Maximal degree in co-relation 15582. Up to 1377 conditions per place. [2023-08-27 14:37:10,118 INFO L140 encePairwiseOnDemand]: 307/318 looper letters, 221 selfloop transitions, 91 changer transitions 13/325 dead transitions. [2023-08-27 14:37:10,118 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 184 places, 325 transitions, 4848 flow [2023-08-27 14:37:10,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-08-27 14:37:10,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-08-27 14:37:10,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1012 transitions. [2023-08-27 14:37:10,130 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3977987421383648 [2023-08-27 14:37:10,130 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1012 transitions. [2023-08-27 14:37:10,130 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1012 transitions. [2023-08-27 14:37:10,130 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 14:37:10,130 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1012 transitions. [2023-08-27 14:37:10,131 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 126.5) internal successors, (1012), 8 states have internal predecessors, (1012), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:37:10,132 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 318.0) internal successors, (2862), 9 states have internal predecessors, (2862), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:37:10,132 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 318.0) internal successors, (2862), 9 states have internal predecessors, (2862), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:37:10,133 INFO L175 Difference]: Start difference. First operand has 177 places, 268 transitions, 3672 flow. Second operand 8 states and 1012 transitions. [2023-08-27 14:37:10,133 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 184 places, 325 transitions, 4848 flow [2023-08-27 14:37:10,210 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 184 places, 325 transitions, 4804 flow, removed 22 selfloop flow, removed 0 redundant places. [2023-08-27 14:37:10,214 INFO L231 Difference]: Finished difference. Result has 189 places, 286 transitions, 4202 flow [2023-08-27 14:37:10,214 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=318, PETRI_DIFFERENCE_MINUEND_FLOW=3646, PETRI_DIFFERENCE_MINUEND_PLACES=177, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=268, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=73, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=179, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4202, PETRI_PLACES=189, PETRI_TRANSITIONS=286} [2023-08-27 14:37:10,214 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 148 predicate places. [2023-08-27 14:37:10,214 INFO L495 AbstractCegarLoop]: Abstraction has has 189 places, 286 transitions, 4202 flow [2023-08-27 14:37:10,214 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 119.5) internal successors, (956), 8 states have internal predecessors, (956), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:37:10,214 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 14:37:10,214 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 14:37:10,219 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 14:37:10,418 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 14:37:10,418 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONASSERT === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 23 more)] === [2023-08-27 14:37:10,419 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 14:37:10,419 INFO L85 PathProgramCache]: Analyzing trace with hash 1344572633, now seen corresponding path program 14 times [2023-08-27 14:37:10,419 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 14:37:10,419 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1470426435] [2023-08-27 14:37:10,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 14:37:10,419 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 14:37:10,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 14:37:12,208 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 14:37:12,208 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 14:37:12,208 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1470426435] [2023-08-27 14:37:12,208 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1470426435] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 14:37:12,208 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [12881160] [2023-08-27 14:37:12,208 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-27 14:37:12,208 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 14:37:12,208 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 14:37:12,209 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 14:37:12,210 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 14:37:12,333 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-08-27 14:37:12,334 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 14:37:12,335 INFO L262 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 31 conjunts are in the unsatisfiable core [2023-08-27 14:37:12,336 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 14:37:12,480 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-27 14:37:12,480 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-27 14:37:12,480 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [12881160] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-27 14:37:12,480 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-27 14:37:12,480 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [12] total 18 [2023-08-27 14:37:12,480 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1407425766] [2023-08-27 14:37:12,481 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-27 14:37:12,481 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-08-27 14:37:12,481 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 14:37:12,481 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-08-27 14:37:12,481 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=332, Unknown=0, NotChecked=0, Total=380 [2023-08-27 14:37:12,482 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 117 out of 318 [2023-08-27 14:37:12,482 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 189 places, 286 transitions, 4202 flow. Second operand has 8 states, 8 states have (on average 119.5) internal successors, (956), 8 states have internal predecessors, (956), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:37:12,482 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 14:37:12,482 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 117 of 318 [2023-08-27 14:37:12,482 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 14:37:12,871 INFO L124 PetriNetUnfolderBase]: 1254/2293 cut-off events. [2023-08-27 14:37:12,871 INFO L125 PetriNetUnfolderBase]: For 30202/30202 co-relation queries the response was YES. [2023-08-27 14:37:12,879 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16589 conditions, 2293 events. 1254/2293 cut-off events. For 30202/30202 co-relation queries the response was YES. Maximal size of possible extension queue 151. Compared 13578 event pairs, 213 based on Foata normal form. 1/2293 useless extension candidates. Maximal degree in co-relation 16519. Up to 1771 conditions per place. [2023-08-27 14:37:12,885 INFO L140 encePairwiseOnDemand]: 308/318 looper letters, 251 selfloop transitions, 69 changer transitions 13/333 dead transitions. [2023-08-27 14:37:12,886 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 195 places, 333 transitions, 5311 flow [2023-08-27 14:37:12,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-08-27 14:37:12,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-08-27 14:37:12,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1010 transitions. [2023-08-27 14:37:12,889 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3970125786163522 [2023-08-27 14:37:12,889 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1010 transitions. [2023-08-27 14:37:12,889 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1010 transitions. [2023-08-27 14:37:12,889 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 14:37:12,889 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1010 transitions. [2023-08-27 14:37:12,890 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 126.25) internal successors, (1010), 8 states have internal predecessors, (1010), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:37:12,891 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 318.0) internal successors, (2862), 9 states have internal predecessors, (2862), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:37:12,891 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 318.0) internal successors, (2862), 9 states have internal predecessors, (2862), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:37:12,891 INFO L175 Difference]: Start difference. First operand has 189 places, 286 transitions, 4202 flow. Second operand 8 states and 1010 transitions. [2023-08-27 14:37:12,891 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 195 places, 333 transitions, 5311 flow [2023-08-27 14:37:12,971 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 191 places, 333 transitions, 5162 flow, removed 18 selfloop flow, removed 4 redundant places. [2023-08-27 14:37:12,975 INFO L231 Difference]: Finished difference. Result has 194 places, 299 transitions, 4470 flow [2023-08-27 14:37:12,975 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=318, PETRI_DIFFERENCE_MINUEND_FLOW=4064, PETRI_DIFFERENCE_MINUEND_PLACES=184, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=286, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=56, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=217, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4470, PETRI_PLACES=194, PETRI_TRANSITIONS=299} [2023-08-27 14:37:12,975 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 153 predicate places. [2023-08-27 14:37:12,975 INFO L495 AbstractCegarLoop]: Abstraction has has 194 places, 299 transitions, 4470 flow [2023-08-27 14:37:12,976 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 119.5) internal successors, (956), 8 states have internal predecessors, (956), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:37:12,976 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 14:37:12,976 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 14:37:12,983 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2023-08-27 14:37:13,180 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 14:37:13,181 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONASSERT === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 23 more)] === [2023-08-27 14:37:13,181 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 14:37:13,181 INFO L85 PathProgramCache]: Analyzing trace with hash 178884249, now seen corresponding path program 15 times [2023-08-27 14:37:13,181 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 14:37:13,181 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1423162809] [2023-08-27 14:37:13,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 14:37:13,181 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 14:37:13,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 14:37:15,403 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 14:37:15,403 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 14:37:15,403 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1423162809] [2023-08-27 14:37:15,403 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1423162809] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 14:37:15,403 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2113366871] [2023-08-27 14:37:15,403 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-27 14:37:15,403 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 14:37:15,403 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 14:37:15,404 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 14:37:15,409 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 14:37:15,541 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2023-08-27 14:37:15,541 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 14:37:15,542 INFO L262 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 32 conjunts are in the unsatisfiable core [2023-08-27 14:37:15,544 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 14:37:15,718 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-27 14:37:15,718 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 34 [2023-08-27 14:37:15,781 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-27 14:37:15,781 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-27 14:37:15,781 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2113366871] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-27 14:37:15,782 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-27 14:37:15,782 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [12] total 20 [2023-08-27 14:37:15,782 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1602918638] [2023-08-27 14:37:15,782 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-27 14:37:15,782 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-08-27 14:37:15,782 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 14:37:15,782 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-08-27 14:37:15,782 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=411, Unknown=0, NotChecked=0, Total=462 [2023-08-27 14:37:15,783 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 110 out of 318 [2023-08-27 14:37:15,784 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 194 places, 299 transitions, 4470 flow. Second operand has 10 states, 10 states have (on average 112.0) internal successors, (1120), 10 states have internal predecessors, (1120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:37:15,784 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 14:37:15,784 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 110 of 318 [2023-08-27 14:37:15,784 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 14:37:16,285 INFO L124 PetriNetUnfolderBase]: 1277/2337 cut-off events. [2023-08-27 14:37:16,285 INFO L125 PetriNetUnfolderBase]: For 32119/32119 co-relation queries the response was YES. [2023-08-27 14:37:16,293 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17079 conditions, 2337 events. 1277/2337 cut-off events. For 32119/32119 co-relation queries the response was YES. Maximal size of possible extension queue 156. Compared 13923 event pairs, 213 based on Foata normal form. 1/2337 useless extension candidates. Maximal degree in co-relation 17007. Up to 1760 conditions per place. [2023-08-27 14:37:16,299 INFO L140 encePairwiseOnDemand]: 309/318 looper letters, 258 selfloop transitions, 62 changer transitions 17/337 dead transitions. [2023-08-27 14:37:16,299 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 200 places, 337 transitions, 5463 flow [2023-08-27 14:37:16,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-08-27 14:37:16,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-08-27 14:37:16,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 954 transitions. [2023-08-27 14:37:16,302 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.375 [2023-08-27 14:37:16,302 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 954 transitions. [2023-08-27 14:37:16,302 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 954 transitions. [2023-08-27 14:37:16,302 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 14:37:16,302 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 954 transitions. [2023-08-27 14:37:16,303 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 119.25) internal successors, (954), 8 states have internal predecessors, (954), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:37:16,304 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 318.0) internal successors, (2862), 9 states have internal predecessors, (2862), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:37:16,304 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 318.0) internal successors, (2862), 9 states have internal predecessors, (2862), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:37:16,304 INFO L175 Difference]: Start difference. First operand has 194 places, 299 transitions, 4470 flow. Second operand 8 states and 954 transitions. [2023-08-27 14:37:16,304 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 200 places, 337 transitions, 5463 flow [2023-08-27 14:37:16,381 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 195 places, 337 transitions, 5301 flow, removed 26 selfloop flow, removed 5 redundant places. [2023-08-27 14:37:16,385 INFO L231 Difference]: Finished difference. Result has 198 places, 299 transitions, 4480 flow [2023-08-27 14:37:16,385 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=318, PETRI_DIFFERENCE_MINUEND_FLOW=4318, PETRI_DIFFERENCE_MINUEND_PLACES=188, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=299, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=59, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=237, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4480, PETRI_PLACES=198, PETRI_TRANSITIONS=299} [2023-08-27 14:37:16,386 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 157 predicate places. [2023-08-27 14:37:16,386 INFO L495 AbstractCegarLoop]: Abstraction has has 198 places, 299 transitions, 4480 flow [2023-08-27 14:37:16,386 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 112.0) internal successors, (1120), 10 states have internal predecessors, (1120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:37:16,386 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 14:37:16,386 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 14:37:16,393 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 14:37:16,587 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 14:37:16,587 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONASSERT === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 23 more)] === [2023-08-27 14:37:16,587 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 14:37:16,587 INFO L85 PathProgramCache]: Analyzing trace with hash 359634291, now seen corresponding path program 16 times [2023-08-27 14:37:16,587 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 14:37:16,587 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1656368047] [2023-08-27 14:37:16,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 14:37:16,588 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 14:37:16,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 14:37:17,492 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 14:37:17,493 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 14:37:17,493 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1656368047] [2023-08-27 14:37:17,493 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1656368047] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 14:37:17,493 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [301097850] [2023-08-27 14:37:17,493 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-27 14:37:17,493 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 14:37:17,493 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 14:37:17,494 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 14:37:17,495 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 14:37:17,599 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-27 14:37:17,599 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 14:37:17,600 INFO L262 TraceCheckSpWp]: Trace formula consists of 261 conjuncts, 40 conjunts are in the unsatisfiable core [2023-08-27 14:37:17,603 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 14:37:17,741 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-27 14:37:17,742 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 22 [2023-08-27 14:37:17,818 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-27 14:37:17,818 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 14:37:17,907 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1025 (Array Int Int))) (let ((.cse0 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_1025) c_~queue~0.base))) (or (let ((.cse1 (* c_~start~0 4))) (= (mod (select .cse0 (+ .cse1 c_~queue~0.offset 4)) 4294967296) (mod (select .cse0 (+ .cse1 c_~queue~0.offset)) 4294967296))) (not (= (mod (select .cse0 (+ (* c_~end~0 4) c_~queue~0.offset)) 4294967296) (mod |c_thread1Thread1of1ForFork1_~x~0#1| 4294967296)))))) is different from false [2023-08-27 14:37:17,935 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 14:37:17,936 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 112 treesize of output 114 [2023-08-27 14:37:17,951 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 14:37:17,952 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 58 treesize of output 56 [2023-08-27 14:37:18,165 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-27 14:37:18,165 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [301097850] provided 1 perfect and 1 imperfect interpolant sequences [2023-08-27 14:37:18,165 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-08-27 14:37:18,165 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [11, 10] total 29 [2023-08-27 14:37:18,165 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1311350162] [2023-08-27 14:37:18,165 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-27 14:37:18,166 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-08-27 14:37:18,166 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 14:37:18,166 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-08-27 14:37:18,166 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=776, Unknown=1, NotChecked=56, Total=930 [2023-08-27 14:37:18,167 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 110 out of 318 [2023-08-27 14:37:18,167 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 198 places, 299 transitions, 4480 flow. Second operand has 10 states, 10 states have (on average 112.0) internal successors, (1120), 10 states have internal predecessors, (1120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:37:18,167 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 14:37:18,167 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 110 of 318 [2023-08-27 14:37:18,167 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 14:37:18,763 INFO L124 PetriNetUnfolderBase]: 1268/2326 cut-off events. [2023-08-27 14:37:18,763 INFO L125 PetriNetUnfolderBase]: For 31739/31739 co-relation queries the response was YES. [2023-08-27 14:37:18,771 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16983 conditions, 2326 events. 1268/2326 cut-off events. For 31739/31739 co-relation queries the response was YES. Maximal size of possible extension queue 158. Compared 13939 event pairs, 177 based on Foata normal form. 1/2326 useless extension candidates. Maximal degree in co-relation 16909. Up to 1427 conditions per place. [2023-08-27 14:37:18,777 INFO L140 encePairwiseOnDemand]: 305/318 looper letters, 229 selfloop transitions, 100 changer transitions 16/345 dead transitions. [2023-08-27 14:37:18,777 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 203 places, 345 transitions, 5561 flow [2023-08-27 14:37:18,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-08-27 14:37:18,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-08-27 14:37:18,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1071 transitions. [2023-08-27 14:37:18,779 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3742138364779874 [2023-08-27 14:37:18,779 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1071 transitions. [2023-08-27 14:37:18,779 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1071 transitions. [2023-08-27 14:37:18,779 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 14:37:18,779 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1071 transitions. [2023-08-27 14:37:18,780 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 119.0) internal successors, (1071), 9 states have internal predecessors, (1071), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:37:18,781 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 318.0) internal successors, (3180), 10 states have internal predecessors, (3180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:37:18,781 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 318.0) internal successors, (3180), 10 states have internal predecessors, (3180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:37:18,781 INFO L175 Difference]: Start difference. First operand has 198 places, 299 transitions, 4480 flow. Second operand 9 states and 1071 transitions. [2023-08-27 14:37:18,781 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 203 places, 345 transitions, 5561 flow [2023-08-27 14:37:18,864 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 196 places, 345 transitions, 5423 flow, removed 15 selfloop flow, removed 7 redundant places. [2023-08-27 14:37:18,868 INFO L231 Difference]: Finished difference. Result has 200 places, 304 transitions, 4704 flow [2023-08-27 14:37:18,868 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=318, PETRI_DIFFERENCE_MINUEND_FLOW=4355, PETRI_DIFFERENCE_MINUEND_PLACES=188, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=299, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=95, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=201, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4704, PETRI_PLACES=200, PETRI_TRANSITIONS=304} [2023-08-27 14:37:18,869 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 159 predicate places. [2023-08-27 14:37:18,869 INFO L495 AbstractCegarLoop]: Abstraction has has 200 places, 304 transitions, 4704 flow [2023-08-27 14:37:18,869 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 112.0) internal successors, (1120), 10 states have internal predecessors, (1120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:37:18,869 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 14:37:18,869 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 14:37:18,874 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 14:37:19,069 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,SelfDestructingSolverStorable23 [2023-08-27 14:37:19,069 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONASSERT === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 23 more)] === [2023-08-27 14:37:19,070 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 14:37:19,070 INFO L85 PathProgramCache]: Analyzing trace with hash -1747149829, now seen corresponding path program 17 times [2023-08-27 14:37:19,070 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 14:37:19,070 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [976062766] [2023-08-27 14:37:19,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 14:37:19,070 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 14:37:19,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 14:37:20,106 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 14:37:20,106 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 14:37:20,106 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [976062766] [2023-08-27 14:37:20,106 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [976062766] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 14:37:20,106 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1677772778] [2023-08-27 14:37:20,106 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-27 14:37:20,106 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 14:37:20,106 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 14:37:20,109 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 14:37:20,111 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 14:37:20,228 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-08-27 14:37:20,228 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 14:37:20,230 INFO L262 TraceCheckSpWp]: Trace formula consists of 261 conjuncts, 40 conjunts are in the unsatisfiable core [2023-08-27 14:37:20,231 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 14:37:20,417 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-27 14:37:20,417 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 34 [2023-08-27 14:37:20,478 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-27 14:37:20,478 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 14:37:20,652 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 14:37:20,652 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 87 treesize of output 89 [2023-08-27 14:37:20,655 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 14:37:20,655 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 7 [2023-08-27 14:37:20,850 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-27 14:37:20,850 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1677772778] provided 1 perfect and 1 imperfect interpolant sequences [2023-08-27 14:37:20,850 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-08-27 14:37:20,850 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [12, 10] total 30 [2023-08-27 14:37:20,850 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [216665651] [2023-08-27 14:37:20,850 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-27 14:37:20,850 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-08-27 14:37:20,850 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 14:37:20,851 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-08-27 14:37:20,851 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=892, Unknown=3, NotChecked=0, Total=992 [2023-08-27 14:37:20,851 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 110 out of 318 [2023-08-27 14:37:20,852 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 200 places, 304 transitions, 4704 flow. Second operand has 10 states, 10 states have (on average 112.0) internal successors, (1120), 10 states have internal predecessors, (1120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:37:20,852 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 14:37:20,852 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 110 of 318 [2023-08-27 14:37:20,852 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 14:37:21,482 INFO L124 PetriNetUnfolderBase]: 1261/2319 cut-off events. [2023-08-27 14:37:21,483 INFO L125 PetriNetUnfolderBase]: For 32406/32406 co-relation queries the response was YES. [2023-08-27 14:37:21,491 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17484 conditions, 2319 events. 1261/2319 cut-off events. For 32406/32406 co-relation queries the response was YES. Maximal size of possible extension queue 158. Compared 13917 event pairs, 174 based on Foata normal form. 1/2319 useless extension candidates. Maximal degree in co-relation 17409. Up to 1433 conditions per place. [2023-08-27 14:37:21,498 INFO L140 encePairwiseOnDemand]: 307/318 looper letters, 233 selfloop transitions, 93 changer transitions 22/348 dead transitions. [2023-08-27 14:37:21,498 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 207 places, 348 transitions, 5703 flow [2023-08-27 14:37:21,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-08-27 14:37:21,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-08-27 14:37:21,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1072 transitions. [2023-08-27 14:37:21,499 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3745632424877708 [2023-08-27 14:37:21,499 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1072 transitions. [2023-08-27 14:37:21,500 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1072 transitions. [2023-08-27 14:37:21,500 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 14:37:21,500 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1072 transitions. [2023-08-27 14:37:21,501 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 119.11111111111111) internal successors, (1072), 9 states have internal predecessors, (1072), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:37:21,502 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 318.0) internal successors, (3180), 10 states have internal predecessors, (3180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:37:21,502 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 318.0) internal successors, (3180), 10 states have internal predecessors, (3180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:37:21,502 INFO L175 Difference]: Start difference. First operand has 200 places, 304 transitions, 4704 flow. Second operand 9 states and 1072 transitions. [2023-08-27 14:37:21,502 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 207 places, 348 transitions, 5703 flow [2023-08-27 14:37:21,601 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 200 places, 348 transitions, 5545 flow, removed 14 selfloop flow, removed 7 redundant places. [2023-08-27 14:37:21,605 INFO L231 Difference]: Finished difference. Result has 202 places, 301 transitions, 4689 flow [2023-08-27 14:37:21,606 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=318, PETRI_DIFFERENCE_MINUEND_FLOW=4548, PETRI_DIFFERENCE_MINUEND_PLACES=192, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=304, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=93, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=211, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4689, PETRI_PLACES=202, PETRI_TRANSITIONS=301} [2023-08-27 14:37:21,606 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 161 predicate places. [2023-08-27 14:37:21,606 INFO L495 AbstractCegarLoop]: Abstraction has has 202 places, 301 transitions, 4689 flow [2023-08-27 14:37:21,606 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 112.0) internal successors, (1120), 10 states have internal predecessors, (1120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:37:21,606 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 14:37:21,606 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 14:37:21,611 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 14:37:21,807 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,SelfDestructingSolverStorable24 [2023-08-27 14:37:21,807 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONASSERT === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 23 more)] === [2023-08-27 14:37:21,807 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 14:37:21,807 INFO L85 PathProgramCache]: Analyzing trace with hash -1534994211, now seen corresponding path program 18 times [2023-08-27 14:37:21,808 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 14:37:21,808 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1216553173] [2023-08-27 14:37:21,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 14:37:21,808 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 14:37:21,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 14:37:23,402 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 14:37:23,403 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 14:37:23,403 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1216553173] [2023-08-27 14:37:23,403 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1216553173] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 14:37:23,403 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1397436139] [2023-08-27 14:37:23,403 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-27 14:37:23,403 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 14:37:23,403 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 14:37:23,405 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 14:37:23,407 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 14:37:23,548 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 1 check-sat command(s) [2023-08-27 14:37:23,548 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 14:37:23,549 INFO L262 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 32 conjunts are in the unsatisfiable core [2023-08-27 14:37:23,550 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 14:37:23,714 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-27 14:37:23,715 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 34 [2023-08-27 14:37:23,780 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-27 14:37:23,780 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-27 14:37:23,780 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1397436139] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-27 14:37:23,780 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-27 14:37:23,780 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [12] total 20 [2023-08-27 14:37:23,780 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1642750480] [2023-08-27 14:37:23,780 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-27 14:37:23,780 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-08-27 14:37:23,780 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 14:37:23,781 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-08-27 14:37:23,781 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=410, Unknown=0, NotChecked=0, Total=462 [2023-08-27 14:37:23,781 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 110 out of 318 [2023-08-27 14:37:23,782 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 202 places, 301 transitions, 4689 flow. Second operand has 10 states, 10 states have (on average 112.0) internal successors, (1120), 10 states have internal predecessors, (1120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:37:23,782 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 14:37:23,782 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 110 of 318 [2023-08-27 14:37:23,782 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 14:37:24,276 INFO L124 PetriNetUnfolderBase]: 1263/2318 cut-off events. [2023-08-27 14:37:24,276 INFO L125 PetriNetUnfolderBase]: For 34100/34100 co-relation queries the response was YES. [2023-08-27 14:37:24,285 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17533 conditions, 2318 events. 1263/2318 cut-off events. For 34100/34100 co-relation queries the response was YES. Maximal size of possible extension queue 156. Compared 13811 event pairs, 194 based on Foata normal form. 1/2318 useless extension candidates. Maximal degree in co-relation 17458. Up to 1720 conditions per place. [2023-08-27 14:37:24,292 INFO L140 encePairwiseOnDemand]: 309/318 looper letters, 250 selfloop transitions, 71 changer transitions 17/338 dead transitions. [2023-08-27 14:37:24,292 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 205 places, 338 transitions, 5667 flow [2023-08-27 14:37:24,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-08-27 14:37:24,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-08-27 14:37:24,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 952 transitions. [2023-08-27 14:37:24,293 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3742138364779874 [2023-08-27 14:37:24,293 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 952 transitions. [2023-08-27 14:37:24,293 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 952 transitions. [2023-08-27 14:37:24,294 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 14:37:24,294 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 952 transitions. [2023-08-27 14:37:24,295 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 119.0) internal successors, (952), 8 states have internal predecessors, (952), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:37:24,296 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 318.0) internal successors, (2862), 9 states have internal predecessors, (2862), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:37:24,296 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 318.0) internal successors, (2862), 9 states have internal predecessors, (2862), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:37:24,296 INFO L175 Difference]: Start difference. First operand has 202 places, 301 transitions, 4689 flow. Second operand 8 states and 952 transitions. [2023-08-27 14:37:24,296 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 205 places, 338 transitions, 5667 flow [2023-08-27 14:37:24,416 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 197 places, 338 transitions, 5463 flow, removed 9 selfloop flow, removed 8 redundant places. [2023-08-27 14:37:24,420 INFO L231 Difference]: Finished difference. Result has 200 places, 299 transitions, 4644 flow [2023-08-27 14:37:24,420 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=318, PETRI_DIFFERENCE_MINUEND_FLOW=4495, PETRI_DIFFERENCE_MINUEND_PLACES=190, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=301, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=70, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=230, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4644, PETRI_PLACES=200, PETRI_TRANSITIONS=299} [2023-08-27 14:37:24,421 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 159 predicate places. [2023-08-27 14:37:24,421 INFO L495 AbstractCegarLoop]: Abstraction has has 200 places, 299 transitions, 4644 flow [2023-08-27 14:37:24,421 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 112.0) internal successors, (1120), 10 states have internal predecessors, (1120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:37:24,421 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 14:37:24,421 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 14:37:24,426 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 14:37:24,621 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,SelfDestructingSolverStorable25 [2023-08-27 14:37:24,621 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONASSERT === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 23 more)] === [2023-08-27 14:37:24,622 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 14:37:24,622 INFO L85 PathProgramCache]: Analyzing trace with hash 391039867, now seen corresponding path program 19 times [2023-08-27 14:37:24,622 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 14:37:24,622 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [788403572] [2023-08-27 14:37:24,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 14:37:24,623 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 14:37:24,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 14:37:25,774 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 14:37:25,774 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 14:37:25,774 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [788403572] [2023-08-27 14:37:25,774 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [788403572] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 14:37:25,774 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [40020428] [2023-08-27 14:37:25,774 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-27 14:37:25,774 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 14:37:25,775 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 14:37:25,776 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 14:37:25,776 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 14:37:25,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 14:37:25,889 INFO L262 TraceCheckSpWp]: Trace formula consists of 261 conjuncts, 38 conjunts are in the unsatisfiable core [2023-08-27 14:37:25,890 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 14:37:26,058 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-27 14:37:26,058 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 34 [2023-08-27 14:37:26,118 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-27 14:37:26,118 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 14:37:26,178 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1184 (Array Int Int))) (let ((.cse0 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_1184) c_~queue~0.base)) (.cse1 (* c_~start~0 4))) (= (mod (select .cse0 (+ .cse1 c_~queue~0.offset)) 4294967296) (mod (select .cse0 (+ .cse1 c_~queue~0.offset 4)) 4294967296)))) is different from false [2023-08-27 14:37:26,249 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 14:37:26,249 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 87 treesize of output 89 [2023-08-27 14:37:26,253 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 14:37:26,253 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 7 [2023-08-27 14:37:26,453 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-27 14:37:26,453 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [40020428] provided 1 perfect and 1 imperfect interpolant sequences [2023-08-27 14:37:26,453 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-08-27 14:37:26,453 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [12, 9] total 29 [2023-08-27 14:37:26,453 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [145040519] [2023-08-27 14:37:26,453 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-27 14:37:26,453 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-08-27 14:37:26,454 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 14:37:26,454 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-08-27 14:37:26,454 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=780, Unknown=1, NotChecked=56, Total=930 [2023-08-27 14:37:26,455 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 110 out of 318 [2023-08-27 14:37:26,455 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 200 places, 299 transitions, 4644 flow. Second operand has 10 states, 10 states have (on average 112.0) internal successors, (1120), 10 states have internal predecessors, (1120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:37:26,455 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 14:37:26,455 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 110 of 318 [2023-08-27 14:37:26,455 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 14:37:27,165 INFO L124 PetriNetUnfolderBase]: 1277/2346 cut-off events. [2023-08-27 14:37:27,165 INFO L125 PetriNetUnfolderBase]: For 33884/33884 co-relation queries the response was YES. [2023-08-27 14:37:27,174 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17664 conditions, 2346 events. 1277/2346 cut-off events. For 33884/33884 co-relation queries the response was YES. Maximal size of possible extension queue 161. Compared 14063 event pairs, 208 based on Foata normal form. 1/2346 useless extension candidates. Maximal degree in co-relation 17589. Up to 1612 conditions per place. [2023-08-27 14:37:27,208 INFO L140 encePairwiseOnDemand]: 303/318 looper letters, 235 selfloop transitions, 96 changer transitions 23/354 dead transitions. [2023-08-27 14:37:27,209 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 205 places, 354 transitions, 5783 flow [2023-08-27 14:37:27,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-08-27 14:37:27,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-08-27 14:37:27,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1070 transitions. [2023-08-27 14:37:27,210 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37386443046820406 [2023-08-27 14:37:27,210 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1070 transitions. [2023-08-27 14:37:27,210 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1070 transitions. [2023-08-27 14:37:27,210 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 14:37:27,210 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1070 transitions. [2023-08-27 14:37:27,212 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 118.88888888888889) internal successors, (1070), 9 states have internal predecessors, (1070), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:37:27,213 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 318.0) internal successors, (3180), 10 states have internal predecessors, (3180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:37:27,213 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 318.0) internal successors, (3180), 10 states have internal predecessors, (3180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:37:27,213 INFO L175 Difference]: Start difference. First operand has 200 places, 299 transitions, 4644 flow. Second operand 9 states and 1070 transitions. [2023-08-27 14:37:27,213 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 205 places, 354 transitions, 5783 flow [2023-08-27 14:37:27,297 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 197 places, 354 transitions, 5600 flow, removed 16 selfloop flow, removed 8 redundant places. [2023-08-27 14:37:27,301 INFO L231 Difference]: Finished difference. Result has 201 places, 303 transitions, 4786 flow [2023-08-27 14:37:27,301 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=318, PETRI_DIFFERENCE_MINUEND_FLOW=4473, PETRI_DIFFERENCE_MINUEND_PLACES=189, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=299, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=89, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=203, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4786, PETRI_PLACES=201, PETRI_TRANSITIONS=303} [2023-08-27 14:37:27,301 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 160 predicate places. [2023-08-27 14:37:27,302 INFO L495 AbstractCegarLoop]: Abstraction has has 201 places, 303 transitions, 4786 flow [2023-08-27 14:37:27,302 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 112.0) internal successors, (1120), 10 states have internal predecessors, (1120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:37:27,302 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 14:37:27,302 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 14:37:27,307 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 14:37:27,506 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 14:37:27,506 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONASSERT === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 23 more)] === [2023-08-27 14:37:27,506 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 14:37:27,506 INFO L85 PathProgramCache]: Analyzing trace with hash 1201869101, now seen corresponding path program 20 times [2023-08-27 14:37:27,507 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 14:37:27,507 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1343428521] [2023-08-27 14:37:27,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 14:37:27,507 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 14:37:27,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 14:37:28,909 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 14:37:28,909 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 14:37:28,909 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1343428521] [2023-08-27 14:37:28,909 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1343428521] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 14:37:28,909 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [981904038] [2023-08-27 14:37:28,909 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-27 14:37:28,909 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 14:37:28,910 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 14:37:28,912 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 14:37:28,912 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 14:37:29,041 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-08-27 14:37:29,041 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 14:37:29,042 INFO L262 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 38 conjunts are in the unsatisfiable core [2023-08-27 14:37:29,043 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 14:37:29,048 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 34 treesize of output 32 [2023-08-27 14:37:29,163 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 22 [2023-08-27 14:37:29,253 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-27 14:37:29,253 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-27 14:37:29,253 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [981904038] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-27 14:37:29,253 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-27 14:37:29,253 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [12] total 20 [2023-08-27 14:37:29,253 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1481495428] [2023-08-27 14:37:29,253 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-27 14:37:29,253 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-08-27 14:37:29,254 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 14:37:29,254 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-08-27 14:37:29,254 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=409, Unknown=0, NotChecked=0, Total=462 [2023-08-27 14:37:29,254 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 110 out of 318 [2023-08-27 14:37:29,255 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 201 places, 303 transitions, 4786 flow. Second operand has 10 states, 10 states have (on average 112.0) internal successors, (1120), 10 states have internal predecessors, (1120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:37:29,255 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 14:37:29,255 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 110 of 318 [2023-08-27 14:37:29,255 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 14:37:29,744 INFO L124 PetriNetUnfolderBase]: 1266/2323 cut-off events. [2023-08-27 14:37:29,744 INFO L125 PetriNetUnfolderBase]: For 34870/34870 co-relation queries the response was YES. [2023-08-27 14:37:29,753 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18206 conditions, 2323 events. 1266/2323 cut-off events. For 34870/34870 co-relation queries the response was YES. Maximal size of possible extension queue 160. Compared 13897 event pairs, 197 based on Foata normal form. 1/2323 useless extension candidates. Maximal degree in co-relation 18131. Up to 1572 conditions per place. [2023-08-27 14:37:29,758 INFO L140 encePairwiseOnDemand]: 309/318 looper letters, 243 selfloop transitions, 80 changer transitions 14/337 dead transitions. [2023-08-27 14:37:29,759 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 204 places, 337 transitions, 5768 flow [2023-08-27 14:37:29,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-08-27 14:37:29,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-08-27 14:37:29,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 952 transitions. [2023-08-27 14:37:29,760 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3742138364779874 [2023-08-27 14:37:29,760 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 952 transitions. [2023-08-27 14:37:29,760 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 952 transitions. [2023-08-27 14:37:29,760 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 14:37:29,760 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 952 transitions. [2023-08-27 14:37:29,761 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 119.0) internal successors, (952), 8 states have internal predecessors, (952), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:37:29,762 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 318.0) internal successors, (2862), 9 states have internal predecessors, (2862), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:37:29,762 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 318.0) internal successors, (2862), 9 states have internal predecessors, (2862), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:37:29,762 INFO L175 Difference]: Start difference. First operand has 201 places, 303 transitions, 4786 flow. Second operand 8 states and 952 transitions. [2023-08-27 14:37:29,762 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 204 places, 337 transitions, 5768 flow [2023-08-27 14:37:29,849 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 196 places, 337 transitions, 5545 flow, removed 43 selfloop flow, removed 8 redundant places. [2023-08-27 14:37:29,854 INFO L231 Difference]: Finished difference. Result has 199 places, 304 transitions, 4840 flow [2023-08-27 14:37:29,854 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=318, PETRI_DIFFERENCE_MINUEND_FLOW=4611, PETRI_DIFFERENCE_MINUEND_PLACES=189, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=303, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=79, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=223, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4840, PETRI_PLACES=199, PETRI_TRANSITIONS=304} [2023-08-27 14:37:29,854 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 158 predicate places. [2023-08-27 14:37:29,854 INFO L495 AbstractCegarLoop]: Abstraction has has 199 places, 304 transitions, 4840 flow [2023-08-27 14:37:29,854 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 112.0) internal successors, (1120), 10 states have internal predecessors, (1120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:37:29,854 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 14:37:29,858 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 14:37:29,863 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 14:37:30,063 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,SelfDestructingSolverStorable27 [2023-08-27 14:37:30,063 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONASSERT === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 23 more)] === [2023-08-27 14:37:30,064 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 14:37:30,064 INFO L85 PathProgramCache]: Analyzing trace with hash 1878896729, now seen corresponding path program 21 times [2023-08-27 14:37:30,064 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 14:37:30,064 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [328354260] [2023-08-27 14:37:30,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 14:37:30,064 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 14:37:30,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 14:37:32,296 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 14:37:32,296 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 14:37:32,296 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [328354260] [2023-08-27 14:37:32,296 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [328354260] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 14:37:32,296 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [778293063] [2023-08-27 14:37:32,296 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-27 14:37:32,296 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 14:37:32,296 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 14:37:32,297 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 14:37:32,298 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 14:37:32,428 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2023-08-27 14:37:32,428 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 14:37:32,429 INFO L262 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 36 conjunts are in the unsatisfiable core [2023-08-27 14:37:32,430 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 14:37:32,550 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-27 14:37:32,551 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 21 treesize of output 23 [2023-08-27 14:37:32,586 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-27 14:37:32,586 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 21 treesize of output 23 [2023-08-27 14:37:32,712 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-27 14:37:32,712 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-27 14:37:32,712 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [778293063] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-27 14:37:32,712 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-27 14:37:32,712 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [11] total 20 [2023-08-27 14:37:32,712 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [443940998] [2023-08-27 14:37:32,713 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-27 14:37:32,713 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-08-27 14:37:32,713 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 14:37:32,713 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-08-27 14:37:32,713 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=413, Unknown=0, NotChecked=0, Total=462 [2023-08-27 14:37:32,714 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 107 out of 318 [2023-08-27 14:37:32,714 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 199 places, 304 transitions, 4840 flow. Second operand has 11 states, 11 states have (on average 108.81818181818181) internal successors, (1197), 11 states have internal predecessors, (1197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:37:32,715 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 14:37:32,715 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 107 of 318 [2023-08-27 14:37:32,715 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 14:37:33,216 INFO L124 PetriNetUnfolderBase]: 1272/2335 cut-off events. [2023-08-27 14:37:33,217 INFO L125 PetriNetUnfolderBase]: For 34404/34404 co-relation queries the response was YES. [2023-08-27 14:37:33,226 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17720 conditions, 2335 events. 1272/2335 cut-off events. For 34404/34404 co-relation queries the response was YES. Maximal size of possible extension queue 162. Compared 14067 event pairs, 163 based on Foata normal form. 1/2335 useless extension candidates. Maximal degree in co-relation 17646. Up to 1403 conditions per place. [2023-08-27 14:37:33,233 INFO L140 encePairwiseOnDemand]: 308/318 looper letters, 256 selfloop transitions, 78 changer transitions 13/347 dead transitions. [2023-08-27 14:37:33,233 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 204 places, 347 transitions, 5875 flow [2023-08-27 14:37:33,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-08-27 14:37:33,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-08-27 14:37:33,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 931 transitions. [2023-08-27 14:37:33,234 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36595911949685533 [2023-08-27 14:37:33,234 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 931 transitions. [2023-08-27 14:37:33,234 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 931 transitions. [2023-08-27 14:37:33,235 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 14:37:33,235 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 931 transitions. [2023-08-27 14:37:33,235 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 116.375) internal successors, (931), 8 states have internal predecessors, (931), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:37:33,237 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 318.0) internal successors, (2862), 9 states have internal predecessors, (2862), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:37:33,237 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 318.0) internal successors, (2862), 9 states have internal predecessors, (2862), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:37:33,237 INFO L175 Difference]: Start difference. First operand has 199 places, 304 transitions, 4840 flow. Second operand 8 states and 931 transitions. [2023-08-27 14:37:33,237 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 204 places, 347 transitions, 5875 flow [2023-08-27 14:37:33,332 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 199 places, 347 transitions, 5771 flow, removed 7 selfloop flow, removed 5 redundant places. [2023-08-27 14:37:33,337 INFO L231 Difference]: Finished difference. Result has 201 places, 307 transitions, 4942 flow [2023-08-27 14:37:33,337 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=318, PETRI_DIFFERENCE_MINUEND_FLOW=4738, PETRI_DIFFERENCE_MINUEND_PLACES=192, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=304, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=76, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=227, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4942, PETRI_PLACES=201, PETRI_TRANSITIONS=307} [2023-08-27 14:37:33,338 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 160 predicate places. [2023-08-27 14:37:33,338 INFO L495 AbstractCegarLoop]: Abstraction has has 201 places, 307 transitions, 4942 flow [2023-08-27 14:37:33,338 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 108.81818181818181) internal successors, (1197), 11 states have internal predecessors, (1197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:37:33,338 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 14:37:33,338 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 14:37:33,345 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 14:37:33,539 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2023-08-27 14:37:33,539 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONASSERT === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 23 more)] === [2023-08-27 14:37:33,539 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 14:37:33,540 INFO L85 PathProgramCache]: Analyzing trace with hash -29123595, now seen corresponding path program 22 times [2023-08-27 14:37:33,540 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 14:37:33,540 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [298675651] [2023-08-27 14:37:33,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 14:37:33,540 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 14:37:33,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 14:37:34,647 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 14:37:34,647 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 14:37:34,647 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [298675651] [2023-08-27 14:37:34,647 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [298675651] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 14:37:34,647 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [87665560] [2023-08-27 14:37:34,647 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-27 14:37:34,647 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 14:37:34,647 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 14:37:34,648 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 14:37:34,649 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 14:37:34,769 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-27 14:37:34,770 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 14:37:34,771 INFO L262 TraceCheckSpWp]: Trace formula consists of 261 conjuncts, 42 conjunts are in the unsatisfiable core [2023-08-27 14:37:34,772 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 14:37:34,915 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-27 14:37:34,916 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 21 treesize of output 23 [2023-08-27 14:37:35,011 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-27 14:37:35,012 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 34 [2023-08-27 14:37:35,070 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-27 14:37:35,071 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 14:37:35,363 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 14:37:35,363 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 168 treesize of output 170 [2023-08-27 14:37:35,377 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 97 treesize of output 71 [2023-08-27 14:37:35,392 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 14:37:35,392 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 71 treesize of output 69 [2023-08-27 14:37:35,682 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-27 14:37:35,683 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [87665560] provided 1 perfect and 1 imperfect interpolant sequences [2023-08-27 14:37:35,683 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-08-27 14:37:35,683 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [12, 11] total 32 [2023-08-27 14:37:35,683 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1277329083] [2023-08-27 14:37:35,683 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-27 14:37:35,683 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-08-27 14:37:35,683 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 14:37:35,684 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-08-27 14:37:35,684 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=1007, Unknown=10, NotChecked=0, Total=1122 [2023-08-27 14:37:35,684 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 107 out of 318 [2023-08-27 14:37:35,685 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 201 places, 307 transitions, 4942 flow. Second operand has 11 states, 11 states have (on average 108.81818181818181) internal successors, (1197), 11 states have internal predecessors, (1197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:37:35,685 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 14:37:35,685 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 107 of 318 [2023-08-27 14:37:35,685 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 14:37:36,658 INFO L124 PetriNetUnfolderBase]: 1271/2341 cut-off events. [2023-08-27 14:37:36,658 INFO L125 PetriNetUnfolderBase]: For 36425/36425 co-relation queries the response was YES. [2023-08-27 14:37:36,667 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17934 conditions, 2341 events. 1271/2341 cut-off events. For 36425/36425 co-relation queries the response was YES. Maximal size of possible extension queue 163. Compared 14109 event pairs, 201 based on Foata normal form. 1/2341 useless extension candidates. Maximal degree in co-relation 17860. Up to 1392 conditions per place. [2023-08-27 14:37:36,674 INFO L140 encePairwiseOnDemand]: 307/318 looper letters, 234 selfloop transitions, 117 changer transitions 16/367 dead transitions. [2023-08-27 14:37:36,674 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 211 places, 367 transitions, 6233 flow [2023-08-27 14:37:36,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-08-27 14:37:36,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-08-27 14:37:36,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 1372 transitions. [2023-08-27 14:37:36,675 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35953878406708595 [2023-08-27 14:37:36,675 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 1372 transitions. [2023-08-27 14:37:36,675 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 1372 transitions. [2023-08-27 14:37:36,676 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 14:37:36,676 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 1372 transitions. [2023-08-27 14:37:36,677 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 114.33333333333333) internal successors, (1372), 12 states have internal predecessors, (1372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:37:36,679 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 318.0) internal successors, (4134), 13 states have internal predecessors, (4134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:37:36,679 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 318.0) internal successors, (4134), 13 states have internal predecessors, (4134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:37:36,679 INFO L175 Difference]: Start difference. First operand has 201 places, 307 transitions, 4942 flow. Second operand 12 states and 1372 transitions. [2023-08-27 14:37:36,679 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 211 places, 367 transitions, 6233 flow [2023-08-27 14:37:36,782 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 209 places, 367 transitions, 6145 flow, removed 29 selfloop flow, removed 2 redundant places. [2023-08-27 14:37:36,787 INFO L231 Difference]: Finished difference. Result has 215 places, 316 transitions, 5338 flow [2023-08-27 14:37:36,787 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=318, PETRI_DIFFERENCE_MINUEND_FLOW=4876, PETRI_DIFFERENCE_MINUEND_PLACES=198, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=307, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=108, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=193, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=5338, PETRI_PLACES=215, PETRI_TRANSITIONS=316} [2023-08-27 14:37:36,788 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 174 predicate places. [2023-08-27 14:37:36,788 INFO L495 AbstractCegarLoop]: Abstraction has has 215 places, 316 transitions, 5338 flow [2023-08-27 14:37:36,788 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 108.81818181818181) internal successors, (1197), 11 states have internal predecessors, (1197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:37:36,788 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 14:37:36,788 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] [2023-08-27 14:37:36,795 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 14:37:36,988 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 14:37:36,989 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONASSERT === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 23 more)] === [2023-08-27 14:37:36,989 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 14:37:36,989 INFO L85 PathProgramCache]: Analyzing trace with hash -1302702590, now seen corresponding path program 1 times [2023-08-27 14:37:36,989 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 14:37:36,989 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1053469416] [2023-08-27 14:37:36,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 14:37:36,989 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 14:37:37,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 14:37:37,040 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-27 14:37:37,041 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 14:37:37,041 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1053469416] [2023-08-27 14:37:37,041 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1053469416] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-27 14:37:37,041 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-27 14:37:37,041 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-27 14:37:37,041 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1463468963] [2023-08-27 14:37:37,041 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-27 14:37:37,041 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-27 14:37:37,041 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 14:37:37,042 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-27 14:37:37,042 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-27 14:37:37,042 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 131 out of 318 [2023-08-27 14:37:37,042 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 215 places, 316 transitions, 5338 flow. Second operand has 5 states, 5 states have (on average 135.2) internal successors, (676), 5 states have internal predecessors, (676), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:37:37,042 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 14:37:37,042 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 131 of 318 [2023-08-27 14:37:37,043 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 14:37:37,448 INFO L124 PetriNetUnfolderBase]: 1259/2306 cut-off events. [2023-08-27 14:37:37,448 INFO L125 PetriNetUnfolderBase]: For 37438/37438 co-relation queries the response was YES. [2023-08-27 14:37:37,457 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18343 conditions, 2306 events. 1259/2306 cut-off events. For 37438/37438 co-relation queries the response was YES. Maximal size of possible extension queue 163. Compared 13786 event pairs, 104 based on Foata normal form. 66/2371 useless extension candidates. Maximal degree in co-relation 18262. Up to 1553 conditions per place. [2023-08-27 14:37:37,463 INFO L140 encePairwiseOnDemand]: 312/318 looper letters, 261 selfloop transitions, 104 changer transitions 0/365 dead transitions. [2023-08-27 14:37:37,463 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 214 places, 365 transitions, 6637 flow [2023-08-27 14:37:37,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-27 14:37:37,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-27 14:37:37,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 850 transitions. [2023-08-27 14:37:37,464 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44549266247379454 [2023-08-27 14:37:37,464 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 850 transitions. [2023-08-27 14:37:37,464 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 850 transitions. [2023-08-27 14:37:37,464 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 14:37:37,464 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 850 transitions. [2023-08-27 14:37:37,465 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 141.66666666666666) internal successors, (850), 6 states have internal predecessors, (850), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:37:37,466 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 318.0) internal successors, (2226), 7 states have internal predecessors, (2226), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:37:37,466 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 318.0) internal successors, (2226), 7 states have internal predecessors, (2226), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:37:37,466 INFO L175 Difference]: Start difference. First operand has 215 places, 316 transitions, 5338 flow. Second operand 6 states and 850 transitions. [2023-08-27 14:37:37,466 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 214 places, 365 transitions, 6637 flow [2023-08-27 14:37:37,572 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 207 places, 365 transitions, 6400 flow, removed 49 selfloop flow, removed 7 redundant places. [2023-08-27 14:37:37,576 INFO L231 Difference]: Finished difference. Result has 210 places, 312 transitions, 5444 flow [2023-08-27 14:37:37,577 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=318, PETRI_DIFFERENCE_MINUEND_FLOW=4993, PETRI_DIFFERENCE_MINUEND_PLACES=202, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=305, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=97, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=201, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=5444, PETRI_PLACES=210, PETRI_TRANSITIONS=312} [2023-08-27 14:37:37,577 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 169 predicate places. [2023-08-27 14:37:37,577 INFO L495 AbstractCegarLoop]: Abstraction has has 210 places, 312 transitions, 5444 flow [2023-08-27 14:37:37,577 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 135.2) internal successors, (676), 5 states have internal predecessors, (676), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:37:37,577 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 14:37:37,577 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] [2023-08-27 14:37:37,577 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2023-08-27 14:37:37,577 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONASSERT === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 23 more)] === [2023-08-27 14:37:37,578 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 14:37:37,578 INFO L85 PathProgramCache]: Analyzing trace with hash 1316327696, now seen corresponding path program 2 times [2023-08-27 14:37:37,578 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 14:37:37,578 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [939184291] [2023-08-27 14:37:37,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 14:37:37,578 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 14:37:37,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 14:37:37,626 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-27 14:37:37,626 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 14:37:37,626 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [939184291] [2023-08-27 14:37:37,626 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [939184291] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-27 14:37:37,626 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-27 14:37:37,626 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-27 14:37:37,626 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [594866301] [2023-08-27 14:37:37,626 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-27 14:37:37,627 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-27 14:37:37,627 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 14:37:37,627 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-27 14:37:37,627 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-27 14:37:37,627 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 131 out of 318 [2023-08-27 14:37:37,628 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 210 places, 312 transitions, 5444 flow. Second operand has 5 states, 5 states have (on average 135.2) internal successors, (676), 5 states have internal predecessors, (676), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:37:37,628 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 14:37:37,628 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 131 of 318 [2023-08-27 14:37:37,628 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 14:37:37,944 INFO L124 PetriNetUnfolderBase]: 1007/1947 cut-off events. [2023-08-27 14:37:37,944 INFO L125 PetriNetUnfolderBase]: For 37246/37246 co-relation queries the response was YES. [2023-08-27 14:37:37,951 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15803 conditions, 1947 events. 1007/1947 cut-off events. For 37246/37246 co-relation queries the response was YES. Maximal size of possible extension queue 149. Compared 11930 event pairs, 217 based on Foata normal form. 130/2076 useless extension candidates. Maximal degree in co-relation 15731. Up to 1232 conditions per place. [2023-08-27 14:37:37,957 INFO L140 encePairwiseOnDemand]: 313/318 looper letters, 208 selfloop transitions, 48 changer transitions 40/296 dead transitions. [2023-08-27 14:37:37,957 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 211 places, 296 transitions, 5410 flow [2023-08-27 14:37:37,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-27 14:37:37,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-27 14:37:37,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 708 transitions. [2023-08-27 14:37:37,958 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44528301886792454 [2023-08-27 14:37:37,958 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 708 transitions. [2023-08-27 14:37:37,958 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 708 transitions. [2023-08-27 14:37:37,958 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 14:37:37,958 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 708 transitions. [2023-08-27 14:37:37,959 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 141.6) internal successors, (708), 5 states have internal predecessors, (708), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:37:37,959 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 318.0) internal successors, (1908), 6 states have internal predecessors, (1908), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:37:37,960 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 318.0) internal successors, (1908), 6 states have internal predecessors, (1908), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:37:37,960 INFO L175 Difference]: Start difference. First operand has 210 places, 312 transitions, 5444 flow. Second operand 5 states and 708 transitions. [2023-08-27 14:37:37,960 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 211 places, 296 transitions, 5410 flow [2023-08-27 14:37:38,055 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 198 places, 296 transitions, 5124 flow, removed 41 selfloop flow, removed 13 redundant places. [2023-08-27 14:37:38,059 INFO L231 Difference]: Finished difference. Result has 200 places, 238 transitions, 3868 flow [2023-08-27 14:37:38,059 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=318, PETRI_DIFFERENCE_MINUEND_FLOW=4313, PETRI_DIFFERENCE_MINUEND_PLACES=194, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=270, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=222, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=3868, PETRI_PLACES=200, PETRI_TRANSITIONS=238} [2023-08-27 14:37:38,059 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 159 predicate places. [2023-08-27 14:37:38,060 INFO L495 AbstractCegarLoop]: Abstraction has has 200 places, 238 transitions, 3868 flow [2023-08-27 14:37:38,060 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 135.2) internal successors, (676), 5 states have internal predecessors, (676), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:37:38,060 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 14:37:38,060 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] [2023-08-27 14:37:38,060 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2023-08-27 14:37:38,060 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONASSERT === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 23 more)] === [2023-08-27 14:37:38,060 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 14:37:38,060 INFO L85 PathProgramCache]: Analyzing trace with hash -1892633678, now seen corresponding path program 3 times [2023-08-27 14:37:38,060 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 14:37:38,060 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1006060670] [2023-08-27 14:37:38,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 14:37:38,061 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 14:37:38,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 14:37:38,110 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-27 14:37:38,110 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 14:37:38,110 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1006060670] [2023-08-27 14:37:38,110 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1006060670] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-27 14:37:38,110 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-27 14:37:38,110 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-27 14:37:38,111 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [264847] [2023-08-27 14:37:38,111 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-27 14:37:38,111 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-27 14:37:38,111 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 14:37:38,111 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-27 14:37:38,111 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-08-27 14:37:38,111 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 131 out of 318 [2023-08-27 14:37:38,112 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 200 places, 238 transitions, 3868 flow. Second operand has 5 states, 5 states have (on average 135.2) internal successors, (676), 5 states have internal predecessors, (676), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:37:38,112 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 14:37:38,112 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 131 of 318 [2023-08-27 14:37:38,112 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 14:37:38,346 INFO L124 PetriNetUnfolderBase]: 921/1668 cut-off events. [2023-08-27 14:37:38,346 INFO L125 PetriNetUnfolderBase]: For 28755/28755 co-relation queries the response was YES. [2023-08-27 14:37:38,352 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13786 conditions, 1668 events. 921/1668 cut-off events. For 28755/28755 co-relation queries the response was YES. Maximal size of possible extension queue 123. Compared 9108 event pairs, 206 based on Foata normal form. 26/1693 useless extension candidates. Maximal degree in co-relation 13722. Up to 1331 conditions per place. [2023-08-27 14:37:38,357 INFO L140 encePairwiseOnDemand]: 312/318 looper letters, 184 selfloop transitions, 58 changer transitions 6/248 dead transitions. [2023-08-27 14:37:38,357 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 193 places, 248 transitions, 4386 flow [2023-08-27 14:37:38,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-27 14:37:38,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-27 14:37:38,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 700 transitions. [2023-08-27 14:37:38,358 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44025157232704404 [2023-08-27 14:37:38,358 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 700 transitions. [2023-08-27 14:37:38,358 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 700 transitions. [2023-08-27 14:37:38,359 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 14:37:38,359 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 700 transitions. [2023-08-27 14:37:38,359 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 140.0) internal successors, (700), 5 states have internal predecessors, (700), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:37:38,360 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 318.0) internal successors, (1908), 6 states have internal predecessors, (1908), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:37:38,360 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 318.0) internal successors, (1908), 6 states have internal predecessors, (1908), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:37:38,360 INFO L175 Difference]: Start difference. First operand has 200 places, 238 transitions, 3868 flow. Second operand 5 states and 700 transitions. [2023-08-27 14:37:38,360 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 193 places, 248 transitions, 4386 flow [2023-08-27 14:37:38,423 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 182 places, 248 transitions, 4183 flow, removed 43 selfloop flow, removed 11 redundant places. [2023-08-27 14:37:38,426 INFO L231 Difference]: Finished difference. Result has 183 places, 222 transitions, 3512 flow [2023-08-27 14:37:38,426 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=318, PETRI_DIFFERENCE_MINUEND_FLOW=3421, PETRI_DIFFERENCE_MINUEND_PLACES=178, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=223, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=169, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=3512, PETRI_PLACES=183, PETRI_TRANSITIONS=222} [2023-08-27 14:37:38,427 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 142 predicate places. [2023-08-27 14:37:38,427 INFO L495 AbstractCegarLoop]: Abstraction has has 183 places, 222 transitions, 3512 flow [2023-08-27 14:37:38,427 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 135.2) internal successors, (676), 5 states have internal predecessors, (676), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:37:38,427 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 14:37:38,427 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] [2023-08-27 14:37:38,427 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2023-08-27 14:37:38,427 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONASSERT === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 23 more)] === [2023-08-27 14:37:38,427 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 14:37:38,427 INFO L85 PathProgramCache]: Analyzing trace with hash -1855555475, now seen corresponding path program 2 times [2023-08-27 14:37:38,427 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 14:37:38,428 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1753580421] [2023-08-27 14:37:38,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 14:37:38,428 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 14:37:38,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 14:37:38,475 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-27 14:37:38,475 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 14:37:38,475 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1753580421] [2023-08-27 14:37:38,475 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1753580421] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-27 14:37:38,475 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-27 14:37:38,476 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-27 14:37:38,476 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1446950765] [2023-08-27 14:37:38,476 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-27 14:37:38,476 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-27 14:37:38,476 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 14:37:38,477 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-27 14:37:38,477 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-08-27 14:37:38,477 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 131 out of 318 [2023-08-27 14:37:38,477 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 183 places, 222 transitions, 3512 flow. Second operand has 5 states, 5 states have (on average 135.2) internal successors, (676), 5 states have internal predecessors, (676), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:37:38,477 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 14:37:38,477 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 131 of 318 [2023-08-27 14:37:38,477 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 14:37:38,690 INFO L124 PetriNetUnfolderBase]: 830/1496 cut-off events. [2023-08-27 14:37:38,690 INFO L125 PetriNetUnfolderBase]: For 22247/22247 co-relation queries the response was YES. [2023-08-27 14:37:38,694 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11847 conditions, 1496 events. 830/1496 cut-off events. For 22247/22247 co-relation queries the response was YES. Maximal size of possible extension queue 108. Compared 7892 event pairs, 182 based on Foata normal form. 24/1519 useless extension candidates. Maximal degree in co-relation 11789. Up to 1159 conditions per place. [2023-08-27 14:37:38,698 INFO L140 encePairwiseOnDemand]: 312/318 looper letters, 159 selfloop transitions, 45 changer transitions 10/214 dead transitions. [2023-08-27 14:37:38,699 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 180 places, 214 transitions, 3675 flow [2023-08-27 14:37:38,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-27 14:37:38,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-27 14:37:38,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 697 transitions. [2023-08-27 14:37:38,699 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43836477987421385 [2023-08-27 14:37:38,699 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 697 transitions. [2023-08-27 14:37:38,700 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 697 transitions. [2023-08-27 14:37:38,700 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 14:37:38,700 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 697 transitions. [2023-08-27 14:37:38,700 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 139.4) internal successors, (697), 5 states have internal predecessors, (697), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:37:38,701 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 318.0) internal successors, (1908), 6 states have internal predecessors, (1908), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:37:38,701 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 318.0) internal successors, (1908), 6 states have internal predecessors, (1908), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:37:38,701 INFO L175 Difference]: Start difference. First operand has 183 places, 222 transitions, 3512 flow. Second operand 5 states and 697 transitions. [2023-08-27 14:37:38,701 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 180 places, 214 transitions, 3675 flow [2023-08-27 14:37:38,745 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 171 places, 214 transitions, 3452 flow, removed 31 selfloop flow, removed 9 redundant places. [2023-08-27 14:37:38,747 INFO L231 Difference]: Finished difference. Result has 171 places, 193 transitions, 2841 flow [2023-08-27 14:37:38,747 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=318, PETRI_DIFFERENCE_MINUEND_FLOW=2919, PETRI_DIFFERENCE_MINUEND_PLACES=167, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=201, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=156, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=2841, PETRI_PLACES=171, PETRI_TRANSITIONS=193} [2023-08-27 14:37:38,748 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 130 predicate places. [2023-08-27 14:37:38,748 INFO L495 AbstractCegarLoop]: Abstraction has has 171 places, 193 transitions, 2841 flow [2023-08-27 14:37:38,748 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 135.2) internal successors, (676), 5 states have internal predecessors, (676), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:37:38,748 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 14:37:38,748 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] [2023-08-27 14:37:38,748 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2023-08-27 14:37:38,748 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONASSERT === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 23 more)] === [2023-08-27 14:37:38,748 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 14:37:38,748 INFO L85 PathProgramCache]: Analyzing trace with hash 640273047, now seen corresponding path program 3 times [2023-08-27 14:37:38,749 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 14:37:38,749 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1393929579] [2023-08-27 14:37:38,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 14:37:38,749 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 14:37:38,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 14:37:38,812 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-27 14:37:38,812 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 14:37:38,812 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1393929579] [2023-08-27 14:37:38,812 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1393929579] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-27 14:37:38,812 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-27 14:37:38,812 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-27 14:37:38,812 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [768215345] [2023-08-27 14:37:38,813 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-27 14:37:38,815 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-27 14:37:38,815 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 14:37:38,815 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-27 14:37:38,815 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-27 14:37:38,815 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 131 out of 318 [2023-08-27 14:37:38,816 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 171 places, 193 transitions, 2841 flow. Second operand has 5 states, 5 states have (on average 135.2) internal successors, (676), 5 states have internal predecessors, (676), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:37:38,816 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 14:37:38,816 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 131 of 318 [2023-08-27 14:37:38,816 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 14:37:39,018 INFO L124 PetriNetUnfolderBase]: 796/1431 cut-off events. [2023-08-27 14:37:39,018 INFO L125 PetriNetUnfolderBase]: For 18689/18689 co-relation queries the response was YES. [2023-08-27 14:37:39,023 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10786 conditions, 1431 events. 796/1431 cut-off events. For 18689/18689 co-relation queries the response was YES. Maximal size of possible extension queue 98. Compared 7415 event pairs, 189 based on Foata normal form. 18/1448 useless extension candidates. Maximal degree in co-relation 10733. Up to 1144 conditions per place. [2023-08-27 14:37:39,027 INFO L140 encePairwiseOnDemand]: 313/318 looper letters, 148 selfloop transitions, 46 changer transitions 8/202 dead transitions. [2023-08-27 14:37:39,027 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 170 places, 202 transitions, 3234 flow [2023-08-27 14:37:39,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-27 14:37:39,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-27 14:37:39,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 697 transitions. [2023-08-27 14:37:39,028 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43836477987421385 [2023-08-27 14:37:39,028 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 697 transitions. [2023-08-27 14:37:39,028 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 697 transitions. [2023-08-27 14:37:39,028 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 14:37:39,028 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 697 transitions. [2023-08-27 14:37:39,029 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 139.4) internal successors, (697), 5 states have internal predecessors, (697), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:37:39,030 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 318.0) internal successors, (1908), 6 states have internal predecessors, (1908), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:37:39,030 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 318.0) internal successors, (1908), 6 states have internal predecessors, (1908), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:37:39,030 INFO L175 Difference]: Start difference. First operand has 171 places, 193 transitions, 2841 flow. Second operand 5 states and 697 transitions. [2023-08-27 14:37:39,030 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 170 places, 202 transitions, 3234 flow [2023-08-27 14:37:39,066 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 160 places, 202 transitions, 3045 flow, removed 29 selfloop flow, removed 10 redundant places. [2023-08-27 14:37:39,069 INFO L231 Difference]: Finished difference. Result has 160 places, 180 transitions, 2516 flow [2023-08-27 14:37:39,069 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=318, PETRI_DIFFERENCE_MINUEND_FLOW=2542, PETRI_DIFFERENCE_MINUEND_PLACES=156, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=186, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=140, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=2516, PETRI_PLACES=160, PETRI_TRANSITIONS=180} [2023-08-27 14:37:39,069 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 119 predicate places. [2023-08-27 14:37:39,069 INFO L495 AbstractCegarLoop]: Abstraction has has 160 places, 180 transitions, 2516 flow [2023-08-27 14:37:39,069 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 135.2) internal successors, (676), 5 states have internal predecessors, (676), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:37:39,069 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 14:37:39,069 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] [2023-08-27 14:37:39,069 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2023-08-27 14:37:39,070 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONASSERT === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 23 more)] === [2023-08-27 14:37:39,070 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 14:37:39,070 INFO L85 PathProgramCache]: Analyzing trace with hash -679613291, now seen corresponding path program 4 times [2023-08-27 14:37:39,070 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 14:37:39,070 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [339729093] [2023-08-27 14:37:39,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 14:37:39,070 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 14:37:39,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 14:37:39,120 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-27 14:37:39,120 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 14:37:39,120 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [339729093] [2023-08-27 14:37:39,120 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [339729093] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-27 14:37:39,120 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-27 14:37:39,120 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-27 14:37:39,120 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1508383508] [2023-08-27 14:37:39,120 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-27 14:37:39,121 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-27 14:37:39,121 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 14:37:39,122 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-27 14:37:39,122 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-27 14:37:39,122 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 131 out of 318 [2023-08-27 14:37:39,122 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 160 places, 180 transitions, 2516 flow. Second operand has 5 states, 5 states have (on average 135.2) internal successors, (676), 5 states have internal predecessors, (676), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:37:39,122 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 14:37:39,123 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 131 of 318 [2023-08-27 14:37:39,123 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 14:37:39,306 INFO L124 PetriNetUnfolderBase]: 727/1288 cut-off events. [2023-08-27 14:37:39,306 INFO L125 PetriNetUnfolderBase]: For 14882/14882 co-relation queries the response was YES. [2023-08-27 14:37:39,310 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9135 conditions, 1288 events. 727/1288 cut-off events. For 14882/14882 co-relation queries the response was YES. Maximal size of possible extension queue 86. Compared 6345 event pairs, 161 based on Foata normal form. 18/1305 useless extension candidates. Maximal degree in co-relation 9088. Up to 940 conditions per place. [2023-08-27 14:37:39,314 INFO L140 encePairwiseOnDemand]: 312/318 looper letters, 135 selfloop transitions, 42 changer transitions 13/190 dead transitions. [2023-08-27 14:37:39,314 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 157 places, 190 transitions, 2817 flow [2023-08-27 14:37:39,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-27 14:37:39,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-27 14:37:39,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 703 transitions. [2023-08-27 14:37:39,315 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4421383647798742 [2023-08-27 14:37:39,315 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 703 transitions. [2023-08-27 14:37:39,315 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 703 transitions. [2023-08-27 14:37:39,316 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 14:37:39,316 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 703 transitions. [2023-08-27 14:37:39,316 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 140.6) internal successors, (703), 5 states have internal predecessors, (703), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:37:39,317 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 318.0) internal successors, (1908), 6 states have internal predecessors, (1908), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:37:39,317 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 318.0) internal successors, (1908), 6 states have internal predecessors, (1908), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:37:39,317 INFO L175 Difference]: Start difference. First operand has 160 places, 180 transitions, 2516 flow. Second operand 5 states and 703 transitions. [2023-08-27 14:37:39,317 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 157 places, 190 transitions, 2817 flow [2023-08-27 14:37:39,344 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 150 places, 190 transitions, 2679 flow, removed 12 selfloop flow, removed 7 redundant places. [2023-08-27 14:37:39,346 INFO L231 Difference]: Finished difference. Result has 150 places, 157 transitions, 2107 flow [2023-08-27 14:37:39,346 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=318, PETRI_DIFFERENCE_MINUEND_FLOW=2178, PETRI_DIFFERENCE_MINUEND_PLACES=146, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=167, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=125, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=2107, PETRI_PLACES=150, PETRI_TRANSITIONS=157} [2023-08-27 14:37:39,346 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 109 predicate places. [2023-08-27 14:37:39,346 INFO L495 AbstractCegarLoop]: Abstraction has has 150 places, 157 transitions, 2107 flow [2023-08-27 14:37:39,346 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 135.2) internal successors, (676), 5 states have internal predecessors, (676), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:37:39,347 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 14:37:39,347 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] [2023-08-27 14:37:39,347 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2023-08-27 14:37:39,347 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONASSERT === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 23 more)] === [2023-08-27 14:37:39,347 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 14:37:39,347 INFO L85 PathProgramCache]: Analyzing trace with hash -1333139025, now seen corresponding path program 1 times [2023-08-27 14:37:39,347 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 14:37:39,347 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [80789953] [2023-08-27 14:37:39,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 14:37:39,347 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 14:37:39,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 14:37:40,293 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 14:37:40,294 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 14:37:40,294 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [80789953] [2023-08-27 14:37:40,294 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [80789953] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 14:37:40,294 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [519276642] [2023-08-27 14:37:40,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 14:37:40,294 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 14:37:40,294 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 14:37:40,295 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 14:37:40,295 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 14:37:40,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 14:37:40,424 INFO L262 TraceCheckSpWp]: Trace formula consists of 260 conjuncts, 42 conjunts are in the unsatisfiable core [2023-08-27 14:37:40,424 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 14:37:40,680 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 14:37:40,681 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 14:37:40,825 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 14:37:40,826 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 58 treesize of output 60 [2023-08-27 14:37:41,221 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 14:37:41,221 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [519276642] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 14:37:41,221 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 14:37:41,221 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11, 11] total 35 [2023-08-27 14:37:41,221 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1280574542] [2023-08-27 14:37:41,221 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 14:37:41,221 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2023-08-27 14:37:41,222 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 14:37:41,222 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2023-08-27 14:37:41,222 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=172, Invalid=1160, Unknown=0, NotChecked=0, Total=1332 [2023-08-27 14:37:41,223 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 89 out of 318 [2023-08-27 14:37:41,225 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 150 places, 157 transitions, 2107 flow. Second operand has 37 states, 37 states have (on average 90.86486486486487) internal successors, (3362), 37 states have internal predecessors, (3362), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:37:41,225 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 14:37:41,225 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 89 of 318 [2023-08-27 14:37:41,225 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 14:37:43,896 INFO L124 PetriNetUnfolderBase]: 1119/1847 cut-off events. [2023-08-27 14:37:43,896 INFO L125 PetriNetUnfolderBase]: For 21751/21751 co-relation queries the response was YES. [2023-08-27 14:37:43,902 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13059 conditions, 1847 events. 1119/1847 cut-off events. For 21751/21751 co-relation queries the response was YES. Maximal size of possible extension queue 106. Compared 8973 event pairs, 107 based on Foata normal form. 3/1849 useless extension candidates. Maximal degree in co-relation 13013. Up to 353 conditions per place. [2023-08-27 14:37:43,907 INFO L140 encePairwiseOnDemand]: 305/318 looper letters, 202 selfloop transitions, 124 changer transitions 47/373 dead transitions. [2023-08-27 14:37:43,907 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 175 places, 373 transitions, 4737 flow [2023-08-27 14:37:43,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2023-08-27 14:37:43,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2023-08-27 14:37:43,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 3092 transitions. [2023-08-27 14:37:43,910 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3038522012578616 [2023-08-27 14:37:43,910 INFO L72 ComplementDD]: Start complementDD. Operand 32 states and 3092 transitions. [2023-08-27 14:37:43,910 INFO L73 IsDeterministic]: Start isDeterministic. Operand 32 states and 3092 transitions. [2023-08-27 14:37:43,910 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 14:37:43,910 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 32 states and 3092 transitions. [2023-08-27 14:37:43,913 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 33 states, 32 states have (on average 96.625) internal successors, (3092), 32 states have internal predecessors, (3092), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:37:43,916 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 33 states, 33 states have (on average 318.0) internal successors, (10494), 33 states have internal predecessors, (10494), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:37:43,917 INFO L81 ComplementDD]: Finished complementDD. Result has 33 states, 33 states have (on average 318.0) internal successors, (10494), 33 states have internal predecessors, (10494), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:37:43,917 INFO L175 Difference]: Start difference. First operand has 150 places, 157 transitions, 2107 flow. Second operand 32 states and 3092 transitions. [2023-08-27 14:37:43,917 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 175 places, 373 transitions, 4737 flow [2023-08-27 14:37:43,952 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 166 places, 373 transitions, 4582 flow, removed 15 selfloop flow, removed 9 redundant places. [2023-08-27 14:37:43,956 INFO L231 Difference]: Finished difference. Result has 183 places, 226 transitions, 3496 flow [2023-08-27 14:37:43,956 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=318, PETRI_DIFFERENCE_MINUEND_FLOW=1986, PETRI_DIFFERENCE_MINUEND_PLACES=135, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=157, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=62, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=79, PETRI_DIFFERENCE_SUBTRAHEND_STATES=32, PETRI_FLOW=3496, PETRI_PLACES=183, PETRI_TRANSITIONS=226} [2023-08-27 14:37:43,956 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 142 predicate places. [2023-08-27 14:37:43,956 INFO L495 AbstractCegarLoop]: Abstraction has has 183 places, 226 transitions, 3496 flow [2023-08-27 14:37:43,957 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 90.86486486486487) internal successors, (3362), 37 states have internal predecessors, (3362), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:37:43,957 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 14:37:43,957 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] [2023-08-27 14:37:43,962 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 14:37:44,157 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2023-08-27 14:37:44,158 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONASSERT === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 23 more)] === [2023-08-27 14:37:44,158 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 14:37:44,158 INFO L85 PathProgramCache]: Analyzing trace with hash -162497967, now seen corresponding path program 2 times [2023-08-27 14:37:44,158 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 14:37:44,158 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [129764996] [2023-08-27 14:37:44,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 14:37:44,158 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 14:37:44,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 14:37:45,024 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 14:37:45,025 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 14:37:45,025 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [129764996] [2023-08-27 14:37:45,025 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [129764996] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 14:37:45,025 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [677851874] [2023-08-27 14:37:45,025 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-27 14:37:45,025 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 14:37:45,025 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 14:37:45,026 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 14:37:45,026 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 14:37:45,170 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-27 14:37:45,170 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 14:37:45,172 INFO L262 TraceCheckSpWp]: Trace formula consists of 260 conjuncts, 53 conjunts are in the unsatisfiable core [2023-08-27 14:37:45,173 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 14:37:45,236 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2023-08-27 14:37:45,268 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-27 14:37:45,294 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-27 14:37:45,318 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-27 14:37:45,575 INFO L322 Elim1Store]: treesize reduction 38, result has 15.6 percent of original size [2023-08-27 14:37:45,575 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 82 treesize of output 38 [2023-08-27 14:37:45,597 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 14:37:45,597 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 14:37:48,412 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 14:37:48,412 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 133 treesize of output 97 [2023-08-27 14:37:48,466 INFO L322 Elim1Store]: treesize reduction 8, result has 82.2 percent of original size [2023-08-27 14:37:48,466 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 956 treesize of output 926 [2023-08-27 14:37:48,528 INFO L322 Elim1Store]: treesize reduction 8, result has 82.2 percent of original size [2023-08-27 14:37:48,529 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 435 treesize of output 421 [2023-08-27 14:37:48,599 INFO L322 Elim1Store]: treesize reduction 8, result has 82.2 percent of original size [2023-08-27 14:37:48,600 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 385 treesize of output 321 [2023-08-27 14:37:48,687 INFO L322 Elim1Store]: treesize reduction 8, result has 82.2 percent of original size [2023-08-27 14:37:48,687 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 222 treesize of output 233 [2023-08-27 14:37:50,143 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 14:37:50,144 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [677851874] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 14:37:50,144 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 14:37:50,144 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13, 13] total 38 [2023-08-27 14:37:50,144 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [98689276] [2023-08-27 14:37:50,144 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 14:37:50,144 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2023-08-27 14:37:50,145 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 14:37:50,145 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2023-08-27 14:37:50,145 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=185, Invalid=1368, Unknown=7, NotChecked=0, Total=1560 [2023-08-27 14:37:50,146 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 89 out of 318 [2023-08-27 14:37:50,148 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 183 places, 226 transitions, 3496 flow. Second operand has 40 states, 40 states have (on average 90.725) internal successors, (3629), 40 states have internal predecessors, (3629), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:37:50,148 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 14:37:50,148 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 89 of 318 [2023-08-27 14:37:50,148 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 14:37:53,507 INFO L124 PetriNetUnfolderBase]: 1274/2157 cut-off events. [2023-08-27 14:37:53,507 INFO L125 PetriNetUnfolderBase]: For 29759/29759 co-relation queries the response was YES. [2023-08-27 14:37:53,514 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16383 conditions, 2157 events. 1274/2157 cut-off events. For 29759/29759 co-relation queries the response was YES. Maximal size of possible extension queue 130. Compared 11302 event pairs, 268 based on Foata normal form. 1/2157 useless extension candidates. Maximal degree in co-relation 16324. Up to 1005 conditions per place. [2023-08-27 14:37:53,519 INFO L140 encePairwiseOnDemand]: 307/318 looper letters, 273 selfloop transitions, 69 changer transitions 17/359 dead transitions. [2023-08-27 14:37:53,519 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 196 places, 359 transitions, 5282 flow [2023-08-27 14:37:53,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-08-27 14:37:53,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2023-08-27 14:37:53,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 1836 transitions. [2023-08-27 14:37:53,521 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3038728897715988 [2023-08-27 14:37:53,521 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 1836 transitions. [2023-08-27 14:37:53,521 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 1836 transitions. [2023-08-27 14:37:53,521 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 14:37:53,521 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 1836 transitions. [2023-08-27 14:37:53,523 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 96.63157894736842) internal successors, (1836), 19 states have internal predecessors, (1836), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:37:53,525 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 318.0) internal successors, (6360), 20 states have internal predecessors, (6360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:37:53,525 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 318.0) internal successors, (6360), 20 states have internal predecessors, (6360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:37:53,525 INFO L175 Difference]: Start difference. First operand has 183 places, 226 transitions, 3496 flow. Second operand 19 states and 1836 transitions. [2023-08-27 14:37:53,525 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 196 places, 359 transitions, 5282 flow [2023-08-27 14:37:53,581 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 179 places, 359 transitions, 4704 flow, removed 175 selfloop flow, removed 17 redundant places. [2023-08-27 14:37:53,585 INFO L231 Difference]: Finished difference. Result has 186 places, 251 transitions, 3566 flow [2023-08-27 14:37:53,585 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=318, PETRI_DIFFERENCE_MINUEND_FLOW=2944, PETRI_DIFFERENCE_MINUEND_PLACES=161, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=226, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=166, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=3566, PETRI_PLACES=186, PETRI_TRANSITIONS=251} [2023-08-27 14:37:53,585 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 145 predicate places. [2023-08-27 14:37:53,586 INFO L495 AbstractCegarLoop]: Abstraction has has 186 places, 251 transitions, 3566 flow [2023-08-27 14:37:53,586 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 90.725) internal successors, (3629), 40 states have internal predecessors, (3629), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:37:53,586 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 14:37:53,586 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] [2023-08-27 14:37:53,591 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 14:37:53,786 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 14:37:53,787 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONASSERT === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 23 more)] === [2023-08-27 14:37:53,787 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 14:37:53,787 INFO L85 PathProgramCache]: Analyzing trace with hash 929727437, now seen corresponding path program 3 times [2023-08-27 14:37:53,787 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 14:37:53,787 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [390369574] [2023-08-27 14:37:53,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 14:37:53,787 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 14:37:53,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 14:37:54,609 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 14:37:54,609 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 14:37:54,609 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [390369574] [2023-08-27 14:37:54,609 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [390369574] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 14:37:54,609 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1680810352] [2023-08-27 14:37:54,609 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-27 14:37:54,609 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 14:37:54,610 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 14:37:54,610 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 14:37:54,612 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 14:37:54,794 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-08-27 14:37:54,794 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 14:37:54,795 INFO L262 TraceCheckSpWp]: Trace formula consists of 260 conjuncts, 55 conjunts are in the unsatisfiable core [2023-08-27 14:37:54,797 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 14:37:54,875 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2023-08-27 14:37:54,907 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-27 14:37:54,937 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-27 14:37:54,962 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-27 14:37:55,164 INFO L322 Elim1Store]: treesize reduction 16, result has 15.8 percent of original size [2023-08-27 14:37:55,164 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 82 treesize of output 35 [2023-08-27 14:37:55,190 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 14:37:55,190 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 14:37:59,330 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 14:37:59,330 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 133 treesize of output 97 [2023-08-27 14:37:59,385 INFO L322 Elim1Store]: treesize reduction 8, result has 82.2 percent of original size [2023-08-27 14:37:59,385 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 1932 treesize of output 1836 [2023-08-27 14:37:59,399 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-27 14:37:59,450 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 14:37:59,450 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 321 treesize of output 307 [2023-08-27 14:37:59,462 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-27 14:37:59,495 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 14:37:59,495 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 271 treesize of output 282 [2023-08-27 14:37:59,575 INFO L322 Elim1Store]: treesize reduction 8, result has 82.2 percent of original size [2023-08-27 14:37:59,575 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 297 treesize of output 233 [2023-08-27 14:38:01,929 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 14:38:01,929 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1680810352] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 14:38:01,929 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 14:38:01,929 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13, 13] total 37 [2023-08-27 14:38:01,930 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [116753884] [2023-08-27 14:38:01,930 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 14:38:01,930 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2023-08-27 14:38:01,930 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 14:38:01,930 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2023-08-27 14:38:01,931 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=1285, Unknown=7, NotChecked=0, Total=1482 [2023-08-27 14:38:01,932 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 89 out of 318 [2023-08-27 14:38:01,933 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 186 places, 251 transitions, 3566 flow. Second operand has 39 states, 39 states have (on average 90.61538461538461) internal successors, (3534), 39 states have internal predecessors, (3534), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:38:01,933 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 14:38:01,933 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 89 of 318 [2023-08-27 14:38:01,933 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 14:38:11,251 WARN L234 SmtUtils]: Spent 5.84s on a formula simplification. DAG size of input: 159 DAG size of output: 130 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-27 14:38:15,810 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-27 14:38:17,840 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-27 14:38:19,932 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.09s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-27 14:38:21,993 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.06s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-27 14:38:24,083 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-27 14:38:29,107 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-27 14:38:31,184 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.08s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-27 14:38:33,211 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-27 14:38:35,228 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-27 14:38:37,244 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-27 14:38:43,587 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-27 14:38:48,363 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-27 14:38:50,382 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-27 14:38:52,438 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-27 14:38:54,494 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-27 14:38:57,803 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-27 14:38:59,836 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-27 14:39:01,859 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-27 14:39:03,880 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-27 14:39:05,896 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-27 14:39:28,646 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-27 14:39:30,972 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.12s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-27 14:39:37,897 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-27 14:39:44,883 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-27 14:39:46,899 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-27 14:39:48,914 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-27 14:39:50,927 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-27 14:39:53,009 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-27 14:39:56,857 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-27 14:40:08,753 WARN L234 SmtUtils]: Spent 11.25s on a formula simplification. DAG size of input: 164 DAG size of output: 146 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-27 14:40:15,180 WARN L234 SmtUtils]: Spent 5.03s on a formula simplification. DAG size of input: 135 DAG size of output: 114 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-27 14:40:17,489 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-27 14:40:19,520 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-27 14:40:21,547 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-27 14:40:23,586 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-27 14:40:25,609 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-27 14:40:29,296 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-27 14:40:34,374 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-27 14:40:36,396 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-27 14:40:38,410 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-27 14:40:40,456 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.05s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-27 14:40:42,469 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-27 14:40:44,714 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-27 14:40:46,734 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-27 14:40:48,746 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-27 14:40:50,782 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-27 14:40:52,799 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-27 14:40:56,613 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-27 14:40:58,629 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-27 14:41:00,664 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-27 14:41:02,864 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-27 14:41:07,500 INFO L124 PetriNetUnfolderBase]: 1472/2584 cut-off events. [2023-08-27 14:41:07,500 INFO L125 PetriNetUnfolderBase]: For 28770/28770 co-relation queries the response was YES. [2023-08-27 14:41:07,509 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18071 conditions, 2584 events. 1472/2584 cut-off events. For 28770/28770 co-relation queries the response was YES. Maximal size of possible extension queue 159. Compared 14727 event pairs, 292 based on Foata normal form. 2/2585 useless extension candidates. Maximal degree in co-relation 18011. Up to 1005 conditions per place. [2023-08-27 14:41:07,517 INFO L140 encePairwiseOnDemand]: 304/318 looper letters, 286 selfloop transitions, 168 changer transitions 26/480 dead transitions. [2023-08-27 14:41:07,517 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 222 places, 480 transitions, 6325 flow [2023-08-27 14:41:07,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2023-08-27 14:41:07,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2023-08-27 14:41:07,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 3746 transitions. [2023-08-27 14:41:07,520 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3020480567650379 [2023-08-27 14:41:07,520 INFO L72 ComplementDD]: Start complementDD. Operand 39 states and 3746 transitions. [2023-08-27 14:41:07,520 INFO L73 IsDeterministic]: Start isDeterministic. Operand 39 states and 3746 transitions. [2023-08-27 14:41:07,521 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 14:41:07,521 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 39 states and 3746 transitions. [2023-08-27 14:41:07,524 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 40 states, 39 states have (on average 96.05128205128206) internal successors, (3746), 39 states have internal predecessors, (3746), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:41:07,560 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 40 states, 40 states have (on average 318.0) internal successors, (12720), 40 states have internal predecessors, (12720), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:41:07,561 INFO L81 ComplementDD]: Finished complementDD. Result has 40 states, 40 states have (on average 318.0) internal successors, (12720), 40 states have internal predecessors, (12720), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:41:07,561 INFO L175 Difference]: Start difference. First operand has 186 places, 251 transitions, 3566 flow. Second operand 39 states and 3746 transitions. [2023-08-27 14:41:07,561 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 222 places, 480 transitions, 6325 flow [2023-08-27 14:41:07,623 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 212 places, 480 transitions, 6143 flow, removed 60 selfloop flow, removed 10 redundant places. [2023-08-27 14:41:07,628 INFO L231 Difference]: Finished difference. Result has 224 places, 326 transitions, 5067 flow [2023-08-27 14:41:07,628 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=318, PETRI_DIFFERENCE_MINUEND_FLOW=3485, PETRI_DIFFERENCE_MINUEND_PLACES=174, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=251, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=98, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=140, PETRI_DIFFERENCE_SUBTRAHEND_STATES=39, PETRI_FLOW=5067, PETRI_PLACES=224, PETRI_TRANSITIONS=326} [2023-08-27 14:41:07,629 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 183 predicate places. [2023-08-27 14:41:07,629 INFO L495 AbstractCegarLoop]: Abstraction has has 224 places, 326 transitions, 5067 flow [2023-08-27 14:41:07,629 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 90.61538461538461) internal successors, (3534), 39 states have internal predecessors, (3534), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:41:07,629 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 14:41:07,629 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] [2023-08-27 14:41:07,635 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 14:41:07,834 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2023-08-27 14:41:07,835 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONASSERT === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 23 more)] === [2023-08-27 14:41:07,835 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 14:41:07,835 INFO L85 PathProgramCache]: Analyzing trace with hash -225945093, now seen corresponding path program 4 times [2023-08-27 14:41:07,835 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 14:41:07,836 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [966711907] [2023-08-27 14:41:07,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 14:41:07,836 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 14:41:07,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 14:41:13,017 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 14:41:13,017 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 14:41:13,017 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [966711907] [2023-08-27 14:41:13,017 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [966711907] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 14:41:13,017 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2076352334] [2023-08-27 14:41:13,017 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-27 14:41:13,017 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 14:41:13,017 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 14:41:13,018 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 14:41:13,020 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 14:41:13,157 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-27 14:41:13,157 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 14:41:13,158 INFO L262 TraceCheckSpWp]: Trace formula consists of 260 conjuncts, 39 conjunts are in the unsatisfiable core [2023-08-27 14:41:13,159 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 14:41:16,572 INFO L322 Elim1Store]: treesize reduction 38, result has 15.6 percent of original size [2023-08-27 14:41:16,572 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 82 treesize of output 38 [2023-08-27 14:41:16,850 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 14:41:16,851 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 14:41:18,943 INFO L322 Elim1Store]: treesize reduction 8, result has 82.2 percent of original size [2023-08-27 14:41:18,943 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 59 treesize of output 62 [2023-08-27 14:41:24,895 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 14:41:24,896 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2076352334] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 14:41:24,896 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 14:41:24,896 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 11] total 34 [2023-08-27 14:41:24,896 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1388658196] [2023-08-27 14:41:24,896 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 14:41:24,896 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2023-08-27 14:41:24,896 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 14:41:24,897 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2023-08-27 14:41:24,897 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=161, Invalid=1099, Unknown=0, NotChecked=0, Total=1260 [2023-08-27 14:41:24,898 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 99 out of 318 [2023-08-27 14:41:24,899 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 224 places, 326 transitions, 5067 flow. Second operand has 36 states, 36 states have (on average 100.91666666666667) internal successors, (3633), 36 states have internal predecessors, (3633), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:41:24,900 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 14:41:24,900 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 99 of 318 [2023-08-27 14:41:24,900 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 14:41:49,806 INFO L124 PetriNetUnfolderBase]: 1503/2696 cut-off events. [2023-08-27 14:41:49,807 INFO L125 PetriNetUnfolderBase]: For 34485/34485 co-relation queries the response was YES. [2023-08-27 14:41:49,817 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19835 conditions, 2696 events. 1503/2696 cut-off events. For 34485/34485 co-relation queries the response was YES. Maximal size of possible extension queue 167. Compared 15865 event pairs, 302 based on Foata normal form. 1/2696 useless extension candidates. Maximal degree in co-relation 19765. Up to 1005 conditions per place. [2023-08-27 14:41:49,825 INFO L140 encePairwiseOnDemand]: 305/318 looper letters, 312 selfloop transitions, 157 changer transitions 13/482 dead transitions. [2023-08-27 14:41:49,825 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 246 places, 482 transitions, 7163 flow [2023-08-27 14:41:49,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2023-08-27 14:41:49,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2023-08-27 14:41:49,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 2668 transitions. [2023-08-27 14:41:49,828 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3355974842767296 [2023-08-27 14:41:49,828 INFO L72 ComplementDD]: Start complementDD. Operand 25 states and 2668 transitions. [2023-08-27 14:41:49,828 INFO L73 IsDeterministic]: Start isDeterministic. Operand 25 states and 2668 transitions. [2023-08-27 14:41:49,829 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 14:41:49,829 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 25 states and 2668 transitions. [2023-08-27 14:41:49,831 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 26 states, 25 states have (on average 106.72) internal successors, (2668), 25 states have internal predecessors, (2668), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:41:49,834 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 26 states, 26 states have (on average 318.0) internal successors, (8268), 26 states have internal predecessors, (8268), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:41:49,834 INFO L81 ComplementDD]: Finished complementDD. Result has 26 states, 26 states have (on average 318.0) internal successors, (8268), 26 states have internal predecessors, (8268), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:41:49,834 INFO L175 Difference]: Start difference. First operand has 224 places, 326 transitions, 5067 flow. Second operand 25 states and 2668 transitions. [2023-08-27 14:41:49,834 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 246 places, 482 transitions, 7163 flow [2023-08-27 14:41:49,981 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 235 places, 482 transitions, 6934 flow, removed 91 selfloop flow, removed 11 redundant places. [2023-08-27 14:41:49,987 INFO L231 Difference]: Finished difference. Result has 244 places, 347 transitions, 5728 flow [2023-08-27 14:41:49,987 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=318, PETRI_DIFFERENCE_MINUEND_FLOW=4916, PETRI_DIFFERENCE_MINUEND_PLACES=211, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=326, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=136, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=183, PETRI_DIFFERENCE_SUBTRAHEND_STATES=25, PETRI_FLOW=5728, PETRI_PLACES=244, PETRI_TRANSITIONS=347} [2023-08-27 14:41:49,987 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 203 predicate places. [2023-08-27 14:41:49,987 INFO L495 AbstractCegarLoop]: Abstraction has has 244 places, 347 transitions, 5728 flow [2023-08-27 14:41:49,988 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 100.91666666666667) internal successors, (3633), 36 states have internal predecessors, (3633), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:41:49,988 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 14:41:49,988 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] [2023-08-27 14:41:49,992 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 14:41:50,188 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2023-08-27 14:41:50,188 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONASSERT === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 23 more)] === [2023-08-27 14:41:50,189 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 14:41:50,189 INFO L85 PathProgramCache]: Analyzing trace with hash -533597785, now seen corresponding path program 5 times [2023-08-27 14:41:50,189 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 14:41:50,189 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2134662527] [2023-08-27 14:41:50,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 14:41:50,189 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 14:41:50,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 14:41:55,587 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 14:41:55,587 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 14:41:55,587 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2134662527] [2023-08-27 14:41:55,588 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2134662527] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 14:41:55,588 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [832684433] [2023-08-27 14:41:55,588 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-27 14:41:55,588 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 14:41:55,588 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 14:41:55,589 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 14:41:55,589 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 14:41:55,726 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-27 14:41:55,726 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 14:41:55,727 INFO L262 TraceCheckSpWp]: Trace formula consists of 260 conjuncts, 44 conjunts are in the unsatisfiable core [2023-08-27 14:41:55,728 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 14:41:58,245 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-27 14:41:58,245 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 22 treesize of output 24 [2023-08-27 14:41:59,844 INFO L322 Elim1Store]: treesize reduction 38, result has 15.6 percent of original size [2023-08-27 14:41:59,844 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 82 treesize of output 38 [2023-08-27 14:42:00,145 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 14:42:00,145 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 14:42:02,993 INFO L322 Elim1Store]: treesize reduction 8, result has 82.2 percent of original size [2023-08-27 14:42:02,993 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 114 treesize of output 117 [2023-08-27 14:42:03,121 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 14:42:03,121 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 61 treesize of output 60 [2023-08-27 14:42:09,918 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 14:42:09,918 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [832684433] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 14:42:09,918 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 14:42:09,919 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 36 [2023-08-27 14:42:09,919 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [753030402] [2023-08-27 14:42:09,919 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 14:42:09,919 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2023-08-27 14:42:09,919 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 14:42:09,919 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2023-08-27 14:42:09,920 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=1250, Unknown=1, NotChecked=0, Total=1406 [2023-08-27 14:42:09,921 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 95 out of 318 [2023-08-27 14:42:09,922 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 244 places, 347 transitions, 5728 flow. Second operand has 38 states, 38 states have (on average 96.8157894736842) internal successors, (3679), 38 states have internal predecessors, (3679), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:42:09,922 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 14:42:09,922 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 95 of 318 [2023-08-27 14:42:09,922 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 14:42:38,597 INFO L124 PetriNetUnfolderBase]: 1524/2748 cut-off events. [2023-08-27 14:42:38,597 INFO L125 PetriNetUnfolderBase]: For 40422/40422 co-relation queries the response was YES. [2023-08-27 14:42:38,607 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20809 conditions, 2748 events. 1524/2748 cut-off events. For 40422/40422 co-relation queries the response was YES. Maximal size of possible extension queue 172. Compared 16363 event pairs, 318 based on Foata normal form. 2/2749 useless extension candidates. Maximal degree in co-relation 20732. Up to 1005 conditions per place. [2023-08-27 14:42:38,614 INFO L140 encePairwiseOnDemand]: 306/318 looper letters, 321 selfloop transitions, 120 changer transitions 18/459 dead transitions. [2023-08-27 14:42:38,614 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 264 places, 459 transitions, 7395 flow [2023-08-27 14:42:38,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-08-27 14:42:38,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2023-08-27 14:42:38,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 2251 transitions. [2023-08-27 14:42:38,617 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3217552887364208 [2023-08-27 14:42:38,617 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 2251 transitions. [2023-08-27 14:42:38,617 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 2251 transitions. [2023-08-27 14:42:38,617 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 14:42:38,617 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 2251 transitions. [2023-08-27 14:42:38,619 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 23 states, 22 states have (on average 102.31818181818181) internal successors, (2251), 22 states have internal predecessors, (2251), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:42:38,621 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 23 states, 23 states have (on average 318.0) internal successors, (7314), 23 states have internal predecessors, (7314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:42:38,622 INFO L81 ComplementDD]: Finished complementDD. Result has 23 states, 23 states have (on average 318.0) internal successors, (7314), 23 states have internal predecessors, (7314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:42:38,622 INFO L175 Difference]: Start difference. First operand has 244 places, 347 transitions, 5728 flow. Second operand 22 states and 2251 transitions. [2023-08-27 14:42:38,622 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 264 places, 459 transitions, 7395 flow [2023-08-27 14:42:38,749 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 254 places, 459 transitions, 7291 flow, removed 20 selfloop flow, removed 10 redundant places. [2023-08-27 14:42:38,755 INFO L231 Difference]: Finished difference. Result has 257 places, 347 transitions, 5894 flow [2023-08-27 14:42:38,755 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=318, PETRI_DIFFERENCE_MINUEND_FLOW=5630, PETRI_DIFFERENCE_MINUEND_PLACES=233, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=347, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=118, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=227, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=5894, PETRI_PLACES=257, PETRI_TRANSITIONS=347} [2023-08-27 14:42:38,755 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 216 predicate places. [2023-08-27 14:42:38,756 INFO L495 AbstractCegarLoop]: Abstraction has has 257 places, 347 transitions, 5894 flow [2023-08-27 14:42:38,756 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 96.8157894736842) internal successors, (3679), 38 states have internal predecessors, (3679), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:42:38,756 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 14:42:38,756 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] [2023-08-27 14:42:38,762 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 14:42:38,956 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 14:42:38,956 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONASSERT === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 23 more)] === [2023-08-27 14:42:38,957 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 14:42:38,957 INFO L85 PathProgramCache]: Analyzing trace with hash 1394727311, now seen corresponding path program 6 times [2023-08-27 14:42:38,957 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 14:42:38,957 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1072043440] [2023-08-27 14:42:38,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 14:42:38,957 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 14:42:38,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 14:42:43,460 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 14:42:43,460 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 14:42:43,460 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1072043440] [2023-08-27 14:42:43,460 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1072043440] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 14:42:43,460 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1023819192] [2023-08-27 14:42:43,460 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-27 14:42:43,460 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 14:42:43,460 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 14:42:43,461 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-27 14:42:43,462 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2023-08-27 14:42:43,642 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-08-27 14:42:43,642 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 14:42:43,644 INFO L262 TraceCheckSpWp]: Trace formula consists of 260 conjuncts, 63 conjunts are in the unsatisfiable core [2023-08-27 14:42:43,645 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 14:42:44,373 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-08-27 14:42:44,780 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-27 14:42:45,147 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-27 14:42:47,622 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-27 14:42:47,623 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 26 treesize of output 26 [2023-08-27 14:42:48,204 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-27 14:42:48,211 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-27 14:42:48,226 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 14:42:48,226 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 78 treesize of output 35 [2023-08-27 14:42:48,539 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 14:42:48,539 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 14:42:53,955 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 14:42:53,955 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 127 treesize of output 91 [2023-08-27 14:42:54,377 INFO L322 Elim1Store]: treesize reduction 8, result has 82.2 percent of original size [2023-08-27 14:42:54,377 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 592 treesize of output 578 [2023-08-27 14:42:54,784 INFO L322 Elim1Store]: treesize reduction 8, result has 82.2 percent of original size [2023-08-27 14:42:54,785 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 315 treesize of output 301 [2023-08-27 14:42:54,847 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-27 14:42:55,062 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 14:42:55,062 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 176 treesize of output 187 [2023-08-27 14:42:55,095 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 14:42:55,095 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 178 treesize of output 126 [2023-08-27 14:42:59,794 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 14:42:59,794 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1023819192] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 14:42:59,794 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 14:42:59,794 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13, 13] total 38 [2023-08-27 14:42:59,795 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [205849782] [2023-08-27 14:42:59,795 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 14:42:59,795 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2023-08-27 14:42:59,795 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 14:42:59,795 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2023-08-27 14:42:59,796 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=184, Invalid=1370, Unknown=6, NotChecked=0, Total=1560 [2023-08-27 14:42:59,797 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 89 out of 318 [2023-08-27 14:42:59,798 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 257 places, 347 transitions, 5894 flow. Second operand has 40 states, 40 states have (on average 90.725) internal successors, (3629), 40 states have internal predecessors, (3629), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:42:59,798 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 14:42:59,798 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 89 of 318 [2023-08-27 14:42:59,798 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 14:43:37,168 INFO L124 PetriNetUnfolderBase]: 1563/2922 cut-off events. [2023-08-27 14:43:37,168 INFO L125 PetriNetUnfolderBase]: For 43256/43256 co-relation queries the response was YES. [2023-08-27 14:43:37,182 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22175 conditions, 2922 events. 1563/2922 cut-off events. For 43256/43256 co-relation queries the response was YES. Maximal size of possible extension queue 180. Compared 18400 event pairs, 344 based on Foata normal form. 6/2927 useless extension candidates. Maximal degree in co-relation 22096. Up to 1004 conditions per place. [2023-08-27 14:43:37,190 INFO L140 encePairwiseOnDemand]: 306/318 looper letters, 360 selfloop transitions, 136 changer transitions 36/532 dead transitions. [2023-08-27 14:43:37,190 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 290 places, 532 transitions, 8162 flow [2023-08-27 14:43:37,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2023-08-27 14:43:37,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2023-08-27 14:43:37,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 3563 transitions. [2023-08-27 14:43:37,194 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.30282168961414246 [2023-08-27 14:43:37,194 INFO L72 ComplementDD]: Start complementDD. Operand 37 states and 3563 transitions. [2023-08-27 14:43:37,194 INFO L73 IsDeterministic]: Start isDeterministic. Operand 37 states and 3563 transitions. [2023-08-27 14:43:37,195 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 14:43:37,195 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 37 states and 3563 transitions. [2023-08-27 14:43:37,197 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 38 states, 37 states have (on average 96.29729729729729) internal successors, (3563), 37 states have internal predecessors, (3563), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:43:37,202 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 38 states, 38 states have (on average 318.0) internal successors, (12084), 38 states have internal predecessors, (12084), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:43:37,202 INFO L81 ComplementDD]: Finished complementDD. Result has 38 states, 38 states have (on average 318.0) internal successors, (12084), 38 states have internal predecessors, (12084), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:43:37,202 INFO L175 Difference]: Start difference. First operand has 257 places, 347 transitions, 5894 flow. Second operand 37 states and 3563 transitions. [2023-08-27 14:43:37,202 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 290 places, 532 transitions, 8162 flow [2023-08-27 14:43:37,346 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 274 places, 532 transitions, 8012 flow, removed 20 selfloop flow, removed 16 redundant places. [2023-08-27 14:43:37,352 INFO L231 Difference]: Finished difference. Result has 281 places, 351 transitions, 6120 flow [2023-08-27 14:43:37,352 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=318, PETRI_DIFFERENCE_MINUEND_FLOW=5767, PETRI_DIFFERENCE_MINUEND_PLACES=238, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=347, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=125, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=216, PETRI_DIFFERENCE_SUBTRAHEND_STATES=37, PETRI_FLOW=6120, PETRI_PLACES=281, PETRI_TRANSITIONS=351} [2023-08-27 14:43:37,352 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 240 predicate places. [2023-08-27 14:43:37,352 INFO L495 AbstractCegarLoop]: Abstraction has has 281 places, 351 transitions, 6120 flow [2023-08-27 14:43:37,353 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 90.725) internal successors, (3629), 40 states have internal predecessors, (3629), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:43:37,353 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 14:43:37,353 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] [2023-08-27 14:43:37,358 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2023-08-27 14:43:37,557 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 14:43:37,557 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONASSERT === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 23 more)] === [2023-08-27 14:43:37,558 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 14:43:37,558 INFO L85 PathProgramCache]: Analyzing trace with hash 1451771089, now seen corresponding path program 7 times [2023-08-27 14:43:37,558 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 14:43:37,558 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [55405135] [2023-08-27 14:43:37,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 14:43:37,558 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 14:43:37,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 14:43:43,459 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 14:43:43,459 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 14:43:43,459 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [55405135] [2023-08-27 14:43:43,459 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [55405135] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 14:43:43,460 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2123522416] [2023-08-27 14:43:43,460 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-27 14:43:43,460 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 14:43:43,460 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 14:43:43,461 INFO L229 MonitoredProcess]: Starting monitored process 34 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-27 14:43:43,467 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2023-08-27 14:43:43,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 14:43:43,609 INFO L262 TraceCheckSpWp]: Trace formula consists of 260 conjuncts, 45 conjunts are in the unsatisfiable core [2023-08-27 14:43:43,610 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 14:43:47,196 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 14:43:47,196 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 14:43:48,583 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 14:43:48,583 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 58 treesize of output 60 [2023-08-27 14:43:54,232 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 14:43:54,233 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2123522416] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 14:43:54,233 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 14:43:54,233 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 10] total 33 [2023-08-27 14:43:54,233 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2100977406] [2023-08-27 14:43:54,233 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 14:43:54,233 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2023-08-27 14:43:54,233 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 14:43:54,234 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2023-08-27 14:43:54,234 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=174, Invalid=1016, Unknown=0, NotChecked=0, Total=1190 [2023-08-27 14:43:54,235 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 99 out of 318 [2023-08-27 14:43:54,236 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 281 places, 351 transitions, 6120 flow. Second operand has 35 states, 35 states have (on average 100.97142857142858) internal successors, (3534), 35 states have internal predecessors, (3534), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:43:54,236 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 14:43:54,236 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 99 of 318 [2023-08-27 14:43:54,236 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 14:44:16,698 INFO L124 PetriNetUnfolderBase]: 1875/3329 cut-off events. [2023-08-27 14:44:16,698 INFO L125 PetriNetUnfolderBase]: For 55452/55452 co-relation queries the response was YES. [2023-08-27 14:44:16,712 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26611 conditions, 3329 events. 1875/3329 cut-off events. For 55452/55452 co-relation queries the response was YES. Maximal size of possible extension queue 200. Compared 20182 event pairs, 308 based on Foata normal form. 3/3331 useless extension candidates. Maximal degree in co-relation 26528. Up to 694 conditions per place. [2023-08-27 14:44:16,720 INFO L140 encePairwiseOnDemand]: 305/318 looper letters, 293 selfloop transitions, 236 changer transitions 39/568 dead transitions. [2023-08-27 14:44:16,720 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 304 places, 568 transitions, 9521 flow [2023-08-27 14:44:16,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2023-08-27 14:44:16,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2023-08-27 14:44:16,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 3106 transitions. [2023-08-27 14:44:16,723 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.33680329646497503 [2023-08-27 14:44:16,724 INFO L72 ComplementDD]: Start complementDD. Operand 29 states and 3106 transitions. [2023-08-27 14:44:16,724 INFO L73 IsDeterministic]: Start isDeterministic. Operand 29 states and 3106 transitions. [2023-08-27 14:44:16,724 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 14:44:16,724 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 29 states and 3106 transitions. [2023-08-27 14:44:16,726 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 30 states, 29 states have (on average 107.10344827586206) internal successors, (3106), 29 states have internal predecessors, (3106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:44:16,730 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 30 states, 30 states have (on average 318.0) internal successors, (9540), 30 states have internal predecessors, (9540), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:44:16,730 INFO L81 ComplementDD]: Finished complementDD. Result has 30 states, 30 states have (on average 318.0) internal successors, (9540), 30 states have internal predecessors, (9540), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:44:16,730 INFO L175 Difference]: Start difference. First operand has 281 places, 351 transitions, 6120 flow. Second operand 29 states and 3106 transitions. [2023-08-27 14:44:16,730 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 304 places, 568 transitions, 9521 flow [2023-08-27 14:44:16,907 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 284 places, 568 transitions, 9270 flow, removed 42 selfloop flow, removed 20 redundant places. [2023-08-27 14:44:16,914 INFO L231 Difference]: Finished difference. Result has 292 places, 431 transitions, 8097 flow [2023-08-27 14:44:16,914 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=318, PETRI_DIFFERENCE_MINUEND_FLOW=5916, PETRI_DIFFERENCE_MINUEND_PLACES=256, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=351, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=166, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=173, PETRI_DIFFERENCE_SUBTRAHEND_STATES=29, PETRI_FLOW=8097, PETRI_PLACES=292, PETRI_TRANSITIONS=431} [2023-08-27 14:44:16,915 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 251 predicate places. [2023-08-27 14:44:16,915 INFO L495 AbstractCegarLoop]: Abstraction has has 292 places, 431 transitions, 8097 flow [2023-08-27 14:44:16,915 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 100.97142857142858) internal successors, (3534), 35 states have internal predecessors, (3534), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:44:16,915 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 14:44:16,915 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] [2023-08-27 14:44:16,920 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2023-08-27 14:44:17,115 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42 [2023-08-27 14:44:17,116 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONASSERT === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 23 more)] === [2023-08-27 14:44:17,116 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 14:44:17,116 INFO L85 PathProgramCache]: Analyzing trace with hash 1531732463, now seen corresponding path program 8 times [2023-08-27 14:44:17,116 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 14:44:17,116 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1752589865] [2023-08-27 14:44:17,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 14:44:17,116 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 14:44:17,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 14:44:22,838 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 14:44:22,838 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 14:44:22,838 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1752589865] [2023-08-27 14:44:22,838 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1752589865] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 14:44:22,838 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [322106140] [2023-08-27 14:44:22,838 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-27 14:44:22,839 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 14:44:22,839 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 14:44:22,839 INFO L229 MonitoredProcess]: Starting monitored process 35 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-27 14:44:22,840 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2023-08-27 14:44:22,999 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-27 14:44:22,999 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 14:44:23,000 INFO L262 TraceCheckSpWp]: Trace formula consists of 260 conjuncts, 45 conjunts are in the unsatisfiable core [2023-08-27 14:44:23,001 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 14:44:26,480 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 14:44:26,480 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 14:44:27,570 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 14:44:27,570 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 58 treesize of output 60 [2023-08-27 14:44:32,011 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 14:44:32,011 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [322106140] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 14:44:32,011 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 14:44:32,011 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 10] total 32 [2023-08-27 14:44:32,011 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1462899007] [2023-08-27 14:44:32,011 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 14:44:32,011 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2023-08-27 14:44:32,012 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 14:44:32,012 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2023-08-27 14:44:32,012 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=174, Invalid=948, Unknown=0, NotChecked=0, Total=1122 [2023-08-27 14:44:32,013 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 99 out of 318 [2023-08-27 14:44:32,014 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 292 places, 431 transitions, 8097 flow. Second operand has 34 states, 34 states have (on average 100.8529411764706) internal successors, (3429), 34 states have internal predecessors, (3429), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:44:32,015 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 14:44:32,015 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 99 of 318 [2023-08-27 14:44:32,015 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 14:45:03,102 INFO L124 PetriNetUnfolderBase]: 1923/3443 cut-off events. [2023-08-27 14:45:03,102 INFO L125 PetriNetUnfolderBase]: For 63782/63782 co-relation queries the response was YES. [2023-08-27 14:45:03,118 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28712 conditions, 3443 events. 1923/3443 cut-off events. For 63782/63782 co-relation queries the response was YES. Maximal size of possible extension queue 212. Compared 21404 event pairs, 211 based on Foata normal form. 3/3445 useless extension candidates. Maximal degree in co-relation 28627. Up to 629 conditions per place. [2023-08-27 14:45:03,130 INFO L140 encePairwiseOnDemand]: 304/318 looper letters, 265 selfloop transitions, 288 changer transitions 33/586 dead transitions. [2023-08-27 14:45:03,130 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 322 places, 586 transitions, 10423 flow [2023-08-27 14:45:03,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2023-08-27 14:45:03,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2023-08-27 14:45:03,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 3620 transitions. [2023-08-27 14:45:03,133 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3348131705512394 [2023-08-27 14:45:03,133 INFO L72 ComplementDD]: Start complementDD. Operand 34 states and 3620 transitions. [2023-08-27 14:45:03,133 INFO L73 IsDeterministic]: Start isDeterministic. Operand 34 states and 3620 transitions. [2023-08-27 14:45:03,134 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 14:45:03,134 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 34 states and 3620 transitions. [2023-08-27 14:45:03,136 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 35 states, 34 states have (on average 106.47058823529412) internal successors, (3620), 34 states have internal predecessors, (3620), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:45:03,140 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 35 states, 35 states have (on average 318.0) internal successors, (11130), 35 states have internal predecessors, (11130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:45:03,141 INFO L81 ComplementDD]: Finished complementDD. Result has 35 states, 35 states have (on average 318.0) internal successors, (11130), 35 states have internal predecessors, (11130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:45:03,141 INFO L175 Difference]: Start difference. First operand has 292 places, 431 transitions, 8097 flow. Second operand 34 states and 3620 transitions. [2023-08-27 14:45:03,141 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 322 places, 586 transitions, 10423 flow [2023-08-27 14:45:03,394 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 312 places, 586 transitions, 10037 flow, removed 144 selfloop flow, removed 10 redundant places. [2023-08-27 14:45:03,402 INFO L231 Difference]: Finished difference. Result has 322 places, 456 transitions, 9075 flow [2023-08-27 14:45:03,402 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=318, PETRI_DIFFERENCE_MINUEND_FLOW=7729, PETRI_DIFFERENCE_MINUEND_PLACES=279, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=431, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=263, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=153, PETRI_DIFFERENCE_SUBTRAHEND_STATES=34, PETRI_FLOW=9075, PETRI_PLACES=322, PETRI_TRANSITIONS=456} [2023-08-27 14:45:03,402 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 281 predicate places. [2023-08-27 14:45:03,402 INFO L495 AbstractCegarLoop]: Abstraction has has 322 places, 456 transitions, 9075 flow [2023-08-27 14:45:03,403 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 100.8529411764706) internal successors, (3429), 34 states have internal predecessors, (3429), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:45:03,403 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 14:45:03,403 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] [2023-08-27 14:45:03,407 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2023-08-27 14:45:03,603 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,35 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 14:45:03,603 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONASSERT === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 23 more)] === [2023-08-27 14:45:03,603 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 14:45:03,604 INFO L85 PathProgramCache]: Analyzing trace with hash 461272859, now seen corresponding path program 9 times [2023-08-27 14:45:03,604 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 14:45:03,604 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1343473599] [2023-08-27 14:45:03,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 14:45:03,604 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 14:45:03,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 14:45:08,987 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 14:45:08,987 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 14:45:08,987 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1343473599] [2023-08-27 14:45:08,987 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1343473599] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 14:45:08,987 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2085537624] [2023-08-27 14:45:08,987 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-27 14:45:08,988 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 14:45:08,988 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 14:45:08,988 INFO L229 MonitoredProcess]: Starting monitored process 36 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-27 14:45:08,989 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2023-08-27 14:45:09,173 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-08-27 14:45:09,173 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 14:45:09,174 INFO L262 TraceCheckSpWp]: Trace formula consists of 260 conjuncts, 35 conjunts are in the unsatisfiable core [2023-08-27 14:45:09,175 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 14:45:11,563 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 14:45:11,564 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 14:45:12,636 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 14:45:12,637 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 60 treesize of output 62 [2023-08-27 14:45:14,857 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-27 14:45:14,858 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2085537624] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 14:45:14,858 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 14:45:14,858 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9, 8] total 26 [2023-08-27 14:45:14,858 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1361121746] [2023-08-27 14:45:14,858 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 14:45:14,858 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2023-08-27 14:45:14,858 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 14:45:14,859 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2023-08-27 14:45:14,859 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=675, Unknown=0, NotChecked=0, Total=756 [2023-08-27 14:45:14,860 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 99 out of 318 [2023-08-27 14:45:14,861 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 322 places, 456 transitions, 9075 flow. Second operand has 28 states, 28 states have (on average 100.92857142857143) internal successors, (2826), 28 states have internal predecessors, (2826), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:45:14,861 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 14:45:14,861 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 99 of 318 [2023-08-27 14:45:14,861 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 14:45:32,284 INFO L124 PetriNetUnfolderBase]: 1977/3560 cut-off events. [2023-08-27 14:45:32,284 INFO L125 PetriNetUnfolderBase]: For 75121/75121 co-relation queries the response was YES. [2023-08-27 14:45:32,301 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30333 conditions, 3560 events. 1977/3560 cut-off events. For 75121/75121 co-relation queries the response was YES. Maximal size of possible extension queue 222. Compared 22362 event pairs, 322 based on Foata normal form. 3/3558 useless extension candidates. Maximal degree in co-relation 30241. Up to 956 conditions per place. [2023-08-27 14:45:32,311 INFO L140 encePairwiseOnDemand]: 305/318 looper letters, 321 selfloop transitions, 255 changer transitions 26/602 dead transitions. [2023-08-27 14:45:32,311 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 352 places, 602 transitions, 11483 flow [2023-08-27 14:45:32,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2023-08-27 14:45:32,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2023-08-27 14:45:32,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 3498 transitions. [2023-08-27 14:45:32,314 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3333333333333333 [2023-08-27 14:45:32,314 INFO L72 ComplementDD]: Start complementDD. Operand 33 states and 3498 transitions. [2023-08-27 14:45:32,314 INFO L73 IsDeterministic]: Start isDeterministic. Operand 33 states and 3498 transitions. [2023-08-27 14:45:32,314 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 14:45:32,315 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 33 states and 3498 transitions. [2023-08-27 14:45:32,317 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 34 states, 33 states have (on average 106.0) internal successors, (3498), 33 states have internal predecessors, (3498), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:45:32,320 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 34 states, 34 states have (on average 318.0) internal successors, (10812), 34 states have internal predecessors, (10812), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:45:32,321 INFO L81 ComplementDD]: Finished complementDD. Result has 34 states, 34 states have (on average 318.0) internal successors, (10812), 34 states have internal predecessors, (10812), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:45:32,321 INFO L175 Difference]: Start difference. First operand has 322 places, 456 transitions, 9075 flow. Second operand 33 states and 3498 transitions. [2023-08-27 14:45:32,321 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 352 places, 602 transitions, 11483 flow [2023-08-27 14:45:32,588 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 331 places, 602 transitions, 11152 flow, removed 31 selfloop flow, removed 21 redundant places. [2023-08-27 14:45:32,596 INFO L231 Difference]: Finished difference. Result has 340 places, 489 transitions, 10089 flow [2023-08-27 14:45:32,597 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=318, PETRI_DIFFERENCE_MINUEND_FLOW=8750, PETRI_DIFFERENCE_MINUEND_PLACES=299, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=456, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=225, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=217, PETRI_DIFFERENCE_SUBTRAHEND_STATES=33, PETRI_FLOW=10089, PETRI_PLACES=340, PETRI_TRANSITIONS=489} [2023-08-27 14:45:32,597 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 299 predicate places. [2023-08-27 14:45:32,597 INFO L495 AbstractCegarLoop]: Abstraction has has 340 places, 489 transitions, 10089 flow [2023-08-27 14:45:32,597 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 100.92857142857143) internal successors, (2826), 28 states have internal predecessors, (2826), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:45:32,597 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 14:45:32,597 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] [2023-08-27 14:45:32,607 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2023-08-27 14:45:32,802 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2023-08-27 14:45:32,803 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONASSERT === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 23 more)] === [2023-08-27 14:45:32,803 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 14:45:32,803 INFO L85 PathProgramCache]: Analyzing trace with hash -732693643, now seen corresponding path program 10 times [2023-08-27 14:45:32,803 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 14:45:32,803 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1338892971] [2023-08-27 14:45:32,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 14:45:32,803 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 14:45:32,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 14:45:37,261 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 14:45:37,261 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 14:45:37,262 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1338892971] [2023-08-27 14:45:37,262 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1338892971] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 14:45:37,262 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [284453673] [2023-08-27 14:45:37,262 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-27 14:45:37,262 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 14:45:37,262 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 14:45:37,263 INFO L229 MonitoredProcess]: Starting monitored process 37 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-27 14:45:37,263 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2023-08-27 14:45:37,410 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-27 14:45:37,410 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 14:45:37,411 INFO L262 TraceCheckSpWp]: Trace formula consists of 260 conjuncts, 42 conjunts are in the unsatisfiable core [2023-08-27 14:45:37,412 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 14:45:39,593 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-27 14:45:39,594 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 23 treesize of output 25 [2023-08-27 14:45:40,481 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 14:45:40,481 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 14:45:41,261 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1989 (Array Int Int))) (let ((.cse0 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_1989) c_~queue~0.base))) (or (let ((.cse1 (* c_~start~0 4))) (= (mod (select .cse0 (+ .cse1 c_~queue~0.offset)) 4294967296) (mod (select .cse0 (+ .cse1 c_~queue~0.offset 4)) 4294967296))) (not (= (mod |c_thread2Thread1of1ForFork2_~x~1#1| 4294967296) (mod (select .cse0 (+ (* c_~end~0 4) c_~queue~0.offset)) 4294967296)))))) is different from false [2023-08-27 14:45:41,494 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 14:45:41,495 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 112 treesize of output 114 [2023-08-27 14:45:41,628 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 14:45:41,628 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 58 treesize of output 56 [2023-08-27 14:45:45,075 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-27 14:45:45,075 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [284453673] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 14:45:45,075 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 14:45:45,075 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 9] total 31 [2023-08-27 14:45:45,075 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1960604747] [2023-08-27 14:45:45,075 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 14:45:45,076 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2023-08-27 14:45:45,076 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 14:45:45,076 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2023-08-27 14:45:45,076 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=893, Unknown=1, NotChecked=60, Total=1056 [2023-08-27 14:45:45,077 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 95 out of 318 [2023-08-27 14:45:45,078 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 340 places, 489 transitions, 10089 flow. Second operand has 33 states, 33 states have (on average 97.03030303030303) internal successors, (3202), 33 states have internal predecessors, (3202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:45:45,078 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 14:45:45,078 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 95 of 318 [2023-08-27 14:45:45,079 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 14:46:04,614 INFO L124 PetriNetUnfolderBase]: 2001/3620 cut-off events. [2023-08-27 14:46:04,615 INFO L125 PetriNetUnfolderBase]: For 80703/80703 co-relation queries the response was YES. [2023-08-27 14:46:04,633 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31860 conditions, 3620 events. 2001/3620 cut-off events. For 80703/80703 co-relation queries the response was YES. Maximal size of possible extension queue 225. Compared 22997 event pairs, 414 based on Foata normal form. 3/3618 useless extension candidates. Maximal degree in co-relation 31761. Up to 1973 conditions per place. [2023-08-27 14:46:04,644 INFO L140 encePairwiseOnDemand]: 306/318 looper letters, 382 selfloop transitions, 166 changer transitions 30/578 dead transitions. [2023-08-27 14:46:04,644 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 362 places, 578 transitions, 11821 flow [2023-08-27 14:46:04,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2023-08-27 14:46:04,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2023-08-27 14:46:04,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 2553 transitions. [2023-08-27 14:46:04,646 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3211320754716981 [2023-08-27 14:46:04,646 INFO L72 ComplementDD]: Start complementDD. Operand 25 states and 2553 transitions. [2023-08-27 14:46:04,646 INFO L73 IsDeterministic]: Start isDeterministic. Operand 25 states and 2553 transitions. [2023-08-27 14:46:04,647 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 14:46:04,647 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 25 states and 2553 transitions. [2023-08-27 14:46:04,648 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 26 states, 25 states have (on average 102.12) internal successors, (2553), 25 states have internal predecessors, (2553), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:46:04,651 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 26 states, 26 states have (on average 318.0) internal successors, (8268), 26 states have internal predecessors, (8268), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:46:04,651 INFO L81 ComplementDD]: Finished complementDD. Result has 26 states, 26 states have (on average 318.0) internal successors, (8268), 26 states have internal predecessors, (8268), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:46:04,651 INFO L175 Difference]: Start difference. First operand has 340 places, 489 transitions, 10089 flow. Second operand 25 states and 2553 transitions. [2023-08-27 14:46:04,651 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 362 places, 578 transitions, 11821 flow [2023-08-27 14:46:04,967 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 346 places, 578 transitions, 11506 flow, removed 78 selfloop flow, removed 16 redundant places. [2023-08-27 14:46:04,975 INFO L231 Difference]: Finished difference. Result has 352 places, 492 transitions, 10286 flow [2023-08-27 14:46:04,976 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=318, PETRI_DIFFERENCE_MINUEND_FLOW=9796, PETRI_DIFFERENCE_MINUEND_PLACES=322, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=489, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=163, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=324, PETRI_DIFFERENCE_SUBTRAHEND_STATES=25, PETRI_FLOW=10286, PETRI_PLACES=352, PETRI_TRANSITIONS=492} [2023-08-27 14:46:04,976 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 311 predicate places. [2023-08-27 14:46:04,976 INFO L495 AbstractCegarLoop]: Abstraction has has 352 places, 492 transitions, 10286 flow [2023-08-27 14:46:04,976 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 97.03030303030303) internal successors, (3202), 33 states have internal predecessors, (3202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:46:04,976 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 14:46:04,976 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] [2023-08-27 14:46:04,981 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2023-08-27 14:46:05,181 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45,37 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 14:46:05,182 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONASSERT === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 23 more)] === [2023-08-27 14:46:05,182 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 14:46:05,182 INFO L85 PathProgramCache]: Analyzing trace with hash 572870543, now seen corresponding path program 11 times [2023-08-27 14:46:05,182 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 14:46:05,182 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1740383284] [2023-08-27 14:46:05,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 14:46:05,182 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 14:46:05,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 14:46:10,007 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 14:46:10,008 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 14:46:10,008 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1740383284] [2023-08-27 14:46:10,008 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1740383284] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 14:46:10,008 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1943088331] [2023-08-27 14:46:10,008 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-27 14:46:10,008 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 14:46:10,008 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 14:46:10,009 INFO L229 MonitoredProcess]: Starting monitored process 38 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-27 14:46:10,009 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2023-08-27 14:46:10,158 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-27 14:46:10,158 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 14:46:10,159 INFO L262 TraceCheckSpWp]: Trace formula consists of 260 conjuncts, 50 conjunts are in the unsatisfiable core [2023-08-27 14:46:10,160 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 14:46:13,117 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-27 14:46:13,117 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 22 [2023-08-27 14:46:14,282 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 14:46:14,282 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 104 treesize of output 56 [2023-08-27 14:46:14,572 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 14:46:14,572 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 14:46:16,539 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 14:46:16,539 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 116 treesize of output 118 [2023-08-27 14:46:16,663 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 14:46:16,664 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 62 treesize of output 60 [2023-08-27 14:46:20,670 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 14:46:20,670 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1943088331] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 14:46:20,670 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 14:46:20,670 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 12] total 35 [2023-08-27 14:46:20,670 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1324391333] [2023-08-27 14:46:20,670 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 14:46:20,671 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2023-08-27 14:46:20,671 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 14:46:20,671 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2023-08-27 14:46:20,671 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=178, Invalid=1153, Unknown=1, NotChecked=0, Total=1332 [2023-08-27 14:46:20,673 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 89 out of 318 [2023-08-27 14:46:20,673 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 352 places, 492 transitions, 10286 flow. Second operand has 37 states, 37 states have (on average 90.64864864864865) internal successors, (3354), 37 states have internal predecessors, (3354), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:46:20,674 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 14:46:20,674 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 89 of 318 [2023-08-27 14:46:20,674 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 14:46:55,856 INFO L124 PetriNetUnfolderBase]: 2083/3835 cut-off events. [2023-08-27 14:46:55,856 INFO L125 PetriNetUnfolderBase]: For 87734/87734 co-relation queries the response was YES. [2023-08-27 14:46:55,874 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33908 conditions, 3835 events. 2083/3835 cut-off events. For 87734/87734 co-relation queries the response was YES. Maximal size of possible extension queue 237. Compared 25173 event pairs, 400 based on Foata normal form. 7/3837 useless extension candidates. Maximal degree in co-relation 33804. Up to 869 conditions per place. [2023-08-27 14:46:55,884 INFO L140 encePairwiseOnDemand]: 305/318 looper letters, 425 selfloop transitions, 198 changer transitions 58/681 dead transitions. [2023-08-27 14:46:55,884 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 385 places, 681 transitions, 13262 flow [2023-08-27 14:46:55,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2023-08-27 14:46:55,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2023-08-27 14:46:55,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 3441 transitions. [2023-08-27 14:46:55,887 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.30057651991614254 [2023-08-27 14:46:55,887 INFO L72 ComplementDD]: Start complementDD. Operand 36 states and 3441 transitions. [2023-08-27 14:46:55,887 INFO L73 IsDeterministic]: Start isDeterministic. Operand 36 states and 3441 transitions. [2023-08-27 14:46:55,887 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 14:46:55,887 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 36 states and 3441 transitions. [2023-08-27 14:46:55,889 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 37 states, 36 states have (on average 95.58333333333333) internal successors, (3441), 36 states have internal predecessors, (3441), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:46:55,893 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 37 states, 37 states have (on average 318.0) internal successors, (11766), 37 states have internal predecessors, (11766), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:46:55,894 INFO L81 ComplementDD]: Finished complementDD. Result has 37 states, 37 states have (on average 318.0) internal successors, (11766), 37 states have internal predecessors, (11766), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:46:55,894 INFO L175 Difference]: Start difference. First operand has 352 places, 492 transitions, 10286 flow. Second operand 36 states and 3441 transitions. [2023-08-27 14:46:55,894 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 385 places, 681 transitions, 13262 flow [2023-08-27 14:46:56,226 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 362 places, 681 transitions, 12909 flow, removed 24 selfloop flow, removed 23 redundant places. [2023-08-27 14:46:56,235 INFO L231 Difference]: Finished difference. Result has 380 places, 529 transitions, 10971 flow [2023-08-27 14:46:56,236 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=318, PETRI_DIFFERENCE_MINUEND_FLOW=9996, PETRI_DIFFERENCE_MINUEND_PLACES=327, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=492, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=154, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=298, PETRI_DIFFERENCE_SUBTRAHEND_STATES=36, PETRI_FLOW=10971, PETRI_PLACES=380, PETRI_TRANSITIONS=529} [2023-08-27 14:46:56,236 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 339 predicate places. [2023-08-27 14:46:56,236 INFO L495 AbstractCegarLoop]: Abstraction has has 380 places, 529 transitions, 10971 flow [2023-08-27 14:46:56,236 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 90.64864864864865) internal successors, (3354), 37 states have internal predecessors, (3354), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:46:56,237 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 14:46:56,237 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] [2023-08-27 14:46:56,242 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Forceful destruction successful, exit code 0 [2023-08-27 14:46:56,437 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2023-08-27 14:46:56,438 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONASSERT === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 23 more)] === [2023-08-27 14:46:56,438 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 14:46:56,438 INFO L85 PathProgramCache]: Analyzing trace with hash 1869062859, now seen corresponding path program 12 times [2023-08-27 14:46:56,438 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 14:46:56,438 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [339072093] [2023-08-27 14:46:56,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 14:46:56,438 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 14:46:56,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 14:47:00,827 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 14:47:00,827 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 14:47:00,827 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [339072093] [2023-08-27 14:47:00,827 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [339072093] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 14:47:00,827 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [165988878] [2023-08-27 14:47:00,828 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-27 14:47:00,828 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 14:47:00,828 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 14:47:00,828 INFO L229 MonitoredProcess]: Starting monitored process 39 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-27 14:47:00,829 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2023-08-27 14:47:01,006 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-08-27 14:47:01,006 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 14:47:01,008 INFO L262 TraceCheckSpWp]: Trace formula consists of 260 conjuncts, 55 conjunts are in the unsatisfiable core [2023-08-27 14:47:01,009 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 14:47:01,668 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2023-08-27 14:47:01,956 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-27 14:47:02,302 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-27 14:47:04,523 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-27 14:47:04,523 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 31 treesize of output 31 [2023-08-27 14:47:05,207 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 14:47:05,207 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 14:47:10,894 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 14:47:10,894 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 130 treesize of output 94 [2023-08-27 14:47:11,138 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 14:47:11,139 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 4156 treesize of output 3886 [2023-08-27 14:47:11,409 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 14:47:11,410 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 212 treesize of output 222 [2023-08-27 14:47:11,679 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 14:47:11,679 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 186 treesize of output 170 [2023-08-27 14:47:13,883 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 14:47:13,883 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 110 treesize of output 58 [2023-08-27 14:47:14,795 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 14:47:14,795 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [165988878] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 14:47:14,796 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 14:47:14,796 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13, 13] total 38 [2023-08-27 14:47:14,796 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [118232373] [2023-08-27 14:47:14,796 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 14:47:14,796 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2023-08-27 14:47:14,796 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 14:47:14,796 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2023-08-27 14:47:14,797 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=176, Invalid=1381, Unknown=3, NotChecked=0, Total=1560 [2023-08-27 14:47:14,798 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 89 out of 318 [2023-08-27 14:47:14,799 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 380 places, 529 transitions, 10971 flow. Second operand has 40 states, 40 states have (on average 90.725) internal successors, (3629), 40 states have internal predecessors, (3629), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:47:14,799 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 14:47:14,799 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 89 of 318 [2023-08-27 14:47:14,799 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 14:48:24,658 INFO L124 PetriNetUnfolderBase]: 2517/4374 cut-off events. [2023-08-27 14:48:24,658 INFO L125 PetriNetUnfolderBase]: For 115535/115535 co-relation queries the response was YES. [2023-08-27 14:48:24,683 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40628 conditions, 4374 events. 2517/4374 cut-off events. For 115535/115535 co-relation queries the response was YES. Maximal size of possible extension queue 267. Compared 27605 event pairs, 310 based on Foata normal form. 3/4369 useless extension candidates. Maximal degree in co-relation 40510. Up to 1384 conditions per place. [2023-08-27 14:48:24,698 INFO L140 encePairwiseOnDemand]: 304/318 looper letters, 550 selfloop transitions, 373 changer transitions 50/973 dead transitions. [2023-08-27 14:48:24,698 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 425 places, 973 transitions, 19204 flow [2023-08-27 14:48:24,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2023-08-27 14:48:24,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2023-08-27 14:48:24,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 5130 transitions. [2023-08-27 14:48:24,702 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.29874213836477986 [2023-08-27 14:48:24,702 INFO L72 ComplementDD]: Start complementDD. Operand 54 states and 5130 transitions. [2023-08-27 14:48:24,702 INFO L73 IsDeterministic]: Start isDeterministic. Operand 54 states and 5130 transitions. [2023-08-27 14:48:24,702 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 14:48:24,702 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 54 states and 5130 transitions. [2023-08-27 14:48:24,705 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 55 states, 54 states have (on average 95.0) internal successors, (5130), 54 states have internal predecessors, (5130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:48:24,711 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 55 states, 55 states have (on average 318.0) internal successors, (17490), 55 states have internal predecessors, (17490), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:48:24,712 INFO L81 ComplementDD]: Finished complementDD. Result has 55 states, 55 states have (on average 318.0) internal successors, (17490), 55 states have internal predecessors, (17490), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:48:24,712 INFO L175 Difference]: Start difference. First operand has 380 places, 529 transitions, 10971 flow. Second operand 54 states and 5130 transitions. [2023-08-27 14:48:24,712 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 425 places, 973 transitions, 19204 flow [2023-08-27 14:48:25,175 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 403 places, 973 transitions, 18868 flow, removed 47 selfloop flow, removed 22 redundant places. [2023-08-27 14:48:25,188 INFO L231 Difference]: Finished difference. Result has 429 places, 697 transitions, 15736 flow [2023-08-27 14:48:25,188 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=318, PETRI_DIFFERENCE_MINUEND_FLOW=10673, PETRI_DIFFERENCE_MINUEND_PLACES=350, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=529, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=230, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=268, PETRI_DIFFERENCE_SUBTRAHEND_STATES=54, PETRI_FLOW=15736, PETRI_PLACES=429, PETRI_TRANSITIONS=697} [2023-08-27 14:48:25,188 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 388 predicate places. [2023-08-27 14:48:25,189 INFO L495 AbstractCegarLoop]: Abstraction has has 429 places, 697 transitions, 15736 flow [2023-08-27 14:48:25,189 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 90.725) internal successors, (3629), 40 states have internal predecessors, (3629), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:48:25,189 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 14:48:25,189 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] [2023-08-27 14:48:25,194 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Forceful destruction successful, exit code 0 [2023-08-27 14:48:25,394 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2023-08-27 14:48:25,394 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONASSERT === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 23 more)] === [2023-08-27 14:48:25,395 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 14:48:25,395 INFO L85 PathProgramCache]: Analyzing trace with hash -658507077, now seen corresponding path program 13 times [2023-08-27 14:48:25,395 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 14:48:25,395 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1096141826] [2023-08-27 14:48:25,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 14:48:25,395 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 14:48:25,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 14:48:30,243 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 14:48:30,244 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 14:48:30,244 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1096141826] [2023-08-27 14:48:30,244 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1096141826] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 14:48:30,244 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1179648806] [2023-08-27 14:48:30,244 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-27 14:48:30,244 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 14:48:30,244 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 14:48:30,245 INFO L229 MonitoredProcess]: Starting monitored process 40 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-27 14:48:30,246 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2023-08-27 14:48:30,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 14:48:30,399 INFO L262 TraceCheckSpWp]: Trace formula consists of 260 conjuncts, 45 conjunts are in the unsatisfiable core [2023-08-27 14:48:30,400 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 14:48:34,077 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 14:48:34,077 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 14:48:35,344 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 14:48:35,344 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 58 treesize of output 60 [2023-08-27 14:48:38,970 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 14:48:38,970 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1179648806] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 14:48:38,970 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 14:48:38,970 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 11] total 34 [2023-08-27 14:48:38,970 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1263659398] [2023-08-27 14:48:38,970 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 14:48:38,970 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2023-08-27 14:48:38,970 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 14:48:38,971 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2023-08-27 14:48:38,971 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=183, Invalid=1077, Unknown=0, NotChecked=0, Total=1260 [2023-08-27 14:48:38,972 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 99 out of 318 [2023-08-27 14:48:38,973 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 429 places, 697 transitions, 15736 flow. Second operand has 36 states, 36 states have (on average 100.91666666666667) internal successors, (3633), 36 states have internal predecessors, (3633), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:48:38,973 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 14:48:38,973 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 99 of 318 [2023-08-27 14:48:38,974 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 14:49:13,030 INFO L124 PetriNetUnfolderBase]: 3166/5249 cut-off events. [2023-08-27 14:49:13,030 INFO L125 PetriNetUnfolderBase]: For 147525/147525 co-relation queries the response was YES. [2023-08-27 14:49:13,062 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51518 conditions, 5249 events. 3166/5249 cut-off events. For 147525/147525 co-relation queries the response was YES. Maximal size of possible extension queue 306. Compared 31993 event pairs, 292 based on Foata normal form. 3/5243 useless extension candidates. Maximal degree in co-relation 51381. Up to 980 conditions per place. [2023-08-27 14:49:13,080 INFO L140 encePairwiseOnDemand]: 304/318 looper letters, 408 selfloop transitions, 608 changer transitions 34/1050 dead transitions. [2023-08-27 14:49:13,080 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 462 places, 1050 transitions, 23217 flow [2023-08-27 14:49:13,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2023-08-27 14:49:13,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2023-08-27 14:49:13,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 4462 transitions. [2023-08-27 14:49:13,084 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.33408206049715483 [2023-08-27 14:49:13,084 INFO L72 ComplementDD]: Start complementDD. Operand 42 states and 4462 transitions. [2023-08-27 14:49:13,084 INFO L73 IsDeterministic]: Start isDeterministic. Operand 42 states and 4462 transitions. [2023-08-27 14:49:13,084 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 14:49:13,084 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 42 states and 4462 transitions. [2023-08-27 14:49:13,087 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 43 states, 42 states have (on average 106.23809523809524) internal successors, (4462), 42 states have internal predecessors, (4462), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:49:13,091 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 43 states, 43 states have (on average 318.0) internal successors, (13674), 43 states have internal predecessors, (13674), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:49:13,092 INFO L81 ComplementDD]: Finished complementDD. Result has 43 states, 43 states have (on average 318.0) internal successors, (13674), 43 states have internal predecessors, (13674), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:49:13,092 INFO L175 Difference]: Start difference. First operand has 429 places, 697 transitions, 15736 flow. Second operand 42 states and 4462 transitions. [2023-08-27 14:49:13,092 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 462 places, 1050 transitions, 23217 flow [2023-08-27 14:49:14,073 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 441 places, 1050 transitions, 22456 flow, removed 342 selfloop flow, removed 21 redundant places. [2023-08-27 14:49:14,088 INFO L231 Difference]: Finished difference. Result has 460 places, 864 transitions, 21170 flow [2023-08-27 14:49:14,088 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=318, PETRI_DIFFERENCE_MINUEND_FLOW=15282, PETRI_DIFFERENCE_MINUEND_PLACES=400, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=697, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=443, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=214, PETRI_DIFFERENCE_SUBTRAHEND_STATES=42, PETRI_FLOW=21170, PETRI_PLACES=460, PETRI_TRANSITIONS=864} [2023-08-27 14:49:14,089 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 419 predicate places. [2023-08-27 14:49:14,089 INFO L495 AbstractCegarLoop]: Abstraction has has 460 places, 864 transitions, 21170 flow [2023-08-27 14:49:14,089 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 100.91666666666667) internal successors, (3633), 36 states have internal predecessors, (3633), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:49:14,089 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 14:49:14,089 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] [2023-08-27 14:49:14,095 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Ended with exit code 0 [2023-08-27 14:49:14,294 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2023-08-27 14:49:14,294 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONASSERT === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 23 more)] === [2023-08-27 14:49:14,294 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 14:49:14,294 INFO L85 PathProgramCache]: Analyzing trace with hash -404112007, now seen corresponding path program 14 times [2023-08-27 14:49:14,295 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 14:49:14,295 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [843178653] [2023-08-27 14:49:14,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 14:49:14,295 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 14:49:14,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 14:49:20,052 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 14:49:20,052 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 14:49:20,052 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [843178653] [2023-08-27 14:49:20,052 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [843178653] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 14:49:20,052 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [135503541] [2023-08-27 14:49:20,052 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-27 14:49:20,053 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 14:49:20,053 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 14:49:20,053 INFO L229 MonitoredProcess]: Starting monitored process 41 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-27 14:49:20,054 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2023-08-27 14:49:20,215 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-27 14:49:20,215 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 14:49:20,216 INFO L262 TraceCheckSpWp]: Trace formula consists of 260 conjuncts, 35 conjunts are in the unsatisfiable core [2023-08-27 14:49:20,216 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 14:49:22,437 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 14:49:22,437 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 14:49:23,476 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 14:49:23,476 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 60 treesize of output 62 [2023-08-27 14:49:25,977 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-27 14:49:25,977 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [135503541] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 14:49:25,977 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 14:49:25,977 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9, 8] total 26 [2023-08-27 14:49:25,977 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1211923058] [2023-08-27 14:49:25,977 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 14:49:25,977 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2023-08-27 14:49:25,977 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 14:49:25,978 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2023-08-27 14:49:25,978 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=673, Unknown=0, NotChecked=0, Total=756 [2023-08-27 14:49:25,979 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 99 out of 318 [2023-08-27 14:49:25,980 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 460 places, 864 transitions, 21170 flow. Second operand has 28 states, 28 states have (on average 100.92857142857143) internal successors, (2826), 28 states have internal predecessors, (2826), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:49:25,980 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 14:49:25,980 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 99 of 318 [2023-08-27 14:49:25,980 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 14:49:48,877 INFO L124 PetriNetUnfolderBase]: 3191/5309 cut-off events. [2023-08-27 14:49:48,877 INFO L125 PetriNetUnfolderBase]: For 163432/163432 co-relation queries the response was YES. [2023-08-27 14:49:48,912 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54670 conditions, 5309 events. 3191/5309 cut-off events. For 163432/163432 co-relation queries the response was YES. Maximal size of possible extension queue 315. Compared 32637 event pairs, 304 based on Foata normal form. 2/5302 useless extension candidates. Maximal degree in co-relation 54522. Up to 938 conditions per place. [2023-08-27 14:49:48,931 INFO L140 encePairwiseOnDemand]: 304/318 looper letters, 437 selfloop transitions, 557 changer transitions 26/1020 dead transitions. [2023-08-27 14:49:48,931 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 485 places, 1020 transitions, 24696 flow [2023-08-27 14:49:48,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2023-08-27 14:49:48,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2023-08-27 14:49:48,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 2985 transitions. [2023-08-27 14:49:48,933 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.33524258760107817 [2023-08-27 14:49:48,933 INFO L72 ComplementDD]: Start complementDD. Operand 28 states and 2985 transitions. [2023-08-27 14:49:48,933 INFO L73 IsDeterministic]: Start isDeterministic. Operand 28 states and 2985 transitions. [2023-08-27 14:49:48,934 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 14:49:48,934 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 28 states and 2985 transitions. [2023-08-27 14:49:48,935 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 29 states, 28 states have (on average 106.60714285714286) internal successors, (2985), 28 states have internal predecessors, (2985), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:49:48,939 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 29 states, 29 states have (on average 318.0) internal successors, (9222), 29 states have internal predecessors, (9222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:49:48,939 INFO L81 ComplementDD]: Finished complementDD. Result has 29 states, 29 states have (on average 318.0) internal successors, (9222), 29 states have internal predecessors, (9222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:49:48,939 INFO L175 Difference]: Start difference. First operand has 460 places, 864 transitions, 21170 flow. Second operand 28 states and 2985 transitions. [2023-08-27 14:49:48,939 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 485 places, 1020 transitions, 24696 flow [2023-08-27 14:49:50,039 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 463 places, 1020 transitions, 23798 flow, removed 143 selfloop flow, removed 22 redundant places. [2023-08-27 14:49:50,057 INFO L231 Difference]: Finished difference. Result has 470 places, 888 transitions, 22270 flow [2023-08-27 14:49:50,057 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=318, PETRI_DIFFERENCE_MINUEND_FLOW=20286, PETRI_DIFFERENCE_MINUEND_PLACES=436, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=864, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=535, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=322, PETRI_DIFFERENCE_SUBTRAHEND_STATES=28, PETRI_FLOW=22270, PETRI_PLACES=470, PETRI_TRANSITIONS=888} [2023-08-27 14:49:50,057 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 429 predicate places. [2023-08-27 14:49:50,058 INFO L495 AbstractCegarLoop]: Abstraction has has 470 places, 888 transitions, 22270 flow [2023-08-27 14:49:50,058 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 100.92857142857143) internal successors, (2826), 28 states have internal predecessors, (2826), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:49:50,058 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 14:49:50,058 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] [2023-08-27 14:49:50,065 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Forceful destruction successful, exit code 0 [2023-08-27 14:49:50,260 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2023-08-27 14:49:50,261 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONASSERT === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 23 more)] === [2023-08-27 14:49:50,261 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 14:49:50,261 INFO L85 PathProgramCache]: Analyzing trace with hash 666347597, now seen corresponding path program 15 times [2023-08-27 14:49:50,261 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 14:49:50,261 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [968358912] [2023-08-27 14:49:50,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 14:49:50,261 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 14:49:50,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 14:49:56,131 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 14:49:56,131 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 14:49:56,131 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [968358912] [2023-08-27 14:49:56,131 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [968358912] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 14:49:56,131 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [721735367] [2023-08-27 14:49:56,131 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-27 14:49:56,131 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 14:49:56,132 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 14:49:56,132 INFO L229 MonitoredProcess]: Starting monitored process 42 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-27 14:49:56,133 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2023-08-27 14:49:56,317 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-08-27 14:49:56,318 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 14:49:56,319 INFO L262 TraceCheckSpWp]: Trace formula consists of 260 conjuncts, 45 conjunts are in the unsatisfiable core [2023-08-27 14:49:56,320 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 14:49:59,702 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 14:49:59,702 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 14:50:00,757 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 14:50:00,757 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 58 treesize of output 60 [2023-08-27 14:50:24,195 WARN L234 SmtUtils]: Spent 16.12s on a formula simplification. DAG size of input: 176 DAG size of output: 45 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-27 14:50:26,004 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 14:50:26,004 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [721735367] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 14:50:26,004 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 14:50:26,004 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 11] total 33 [2023-08-27 14:50:26,004 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1425088000] [2023-08-27 14:50:26,004 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 14:50:26,005 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2023-08-27 14:50:26,005 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 14:50:26,005 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2023-08-27 14:50:26,005 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=182, Invalid=1008, Unknown=0, NotChecked=0, Total=1190 [2023-08-27 14:50:26,006 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 99 out of 318 [2023-08-27 14:50:26,007 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 470 places, 888 transitions, 22270 flow. Second operand has 35 states, 35 states have (on average 100.8) internal successors, (3528), 35 states have internal predecessors, (3528), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:50:26,007 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 14:50:26,008 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 99 of 318 [2023-08-27 14:50:26,008 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand Received shutdown request... [2023-08-27 14:50:27,118 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 14:50:27,133 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2023-08-27 14:50:27,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-27 14:50:27,164 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr2ASSERT_VIOLATIONASSERT (25 of 26 remaining) [2023-08-27 14:50:27,169 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Forceful destruction successful, exit code 0 [2023-08-27 14:50:27,364 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,42 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 14:50:27,364 WARN L619 AbstractCegarLoop]: Verification canceled: while CegarLoopForPetriNet was enhancing Floyd-Hoare automaton (35states, 99/318 universal loopers) in iteration 51,while PetriNetUnfolder was constructing finite prefix that currently has 170 conditions, 5 events (0/4 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 2. Compared 2 event pairs, 0 based on Foata normal form. 0/6 useless extension candidates. Maximal degree in co-relation 0. Up to 1 conditions per place.). [2023-08-27 14:50:27,365 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (24 of 26 remaining) [2023-08-27 14:50:27,366 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW (23 of 26 remaining) [2023-08-27 14:50:27,366 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (22 of 26 remaining) [2023-08-27 14:50:27,366 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location thread2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW (21 of 26 remaining) [2023-08-27 14:50:27,366 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location thread3Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (20 of 26 remaining) [2023-08-27 14:50:27,366 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location thread3Err1ASSERT_VIOLATIONINTEGER_OVERFLOW (19 of 26 remaining) [2023-08-27 14:50:27,366 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location thread3Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (18 of 26 remaining) [2023-08-27 14:50:27,366 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location thread3Err3ASSERT_VIOLATIONINTEGER_OVERFLOW (17 of 26 remaining) [2023-08-27 14:50:27,366 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location thread3Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (16 of 26 remaining) [2023-08-27 14:50:27,366 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location thread3Err5ASSERT_VIOLATIONINTEGER_OVERFLOW (15 of 26 remaining) [2023-08-27 14:50:27,366 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW (14 of 26 remaining) [2023-08-27 14:50:27,366 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW (13 of 26 remaining) [2023-08-27 14:50:27,366 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (12 of 26 remaining) [2023-08-27 14:50:27,366 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (11 of 26 remaining) [2023-08-27 14:50:27,366 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (10 of 26 remaining) [2023-08-27 14:50:27,367 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (9 of 26 remaining) [2023-08-27 14:50:27,367 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW (8 of 26 remaining) [2023-08-27 14:50:27,367 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (7 of 26 remaining) [2023-08-27 14:50:27,367 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location thread2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW (6 of 26 remaining) [2023-08-27 14:50:27,367 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location thread3Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (5 of 26 remaining) [2023-08-27 14:50:27,367 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location thread3Err1ASSERT_VIOLATIONINTEGER_OVERFLOW (4 of 26 remaining) [2023-08-27 14:50:27,367 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location thread3Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (3 of 26 remaining) [2023-08-27 14:50:27,367 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location thread3Err3ASSERT_VIOLATIONINTEGER_OVERFLOW (2 of 26 remaining) [2023-08-27 14:50:27,367 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location thread3Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (1 of 26 remaining) [2023-08-27 14:50:27,367 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location thread3Err5ASSERT_VIOLATIONINTEGER_OVERFLOW (0 of 26 remaining) [2023-08-27 14:50:27,367 INFO L445 BasicCegarLoop]: Path program histogram: [22, 15, 4, 3, 2, 1, 1, 1, 1, 1] [2023-08-27 14:50:27,370 INFO L228 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2023-08-27 14:50:27,370 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-08-27 14:50:27,372 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 27.08 02:50:27 BasicIcfg [2023-08-27 14:50:27,372 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-08-27 14:50:27,372 INFO L158 Benchmark]: Toolchain (without parser) took 845722.08ms. Allocated memory was 364.9MB in the beginning and 1.2GB in the end (delta: 841.0MB). Free memory was 340.7MB in the beginning and 872.7MB in the end (delta: -532.1MB). Peak memory consumption was 310.7MB. Max. memory is 16.0GB. [2023-08-27 14:50:27,372 INFO L158 Benchmark]: CDTParser took 0.10ms. Allocated memory is still 364.9MB. Free memory was 342.9MB in the beginning and 342.8MB in the end (delta: 86.2kB). There was no memory consumed. Max. memory is 16.0GB. [2023-08-27 14:50:27,372 INFO L158 Benchmark]: CACSL2BoogieTranslator took 148.70ms. Allocated memory is still 364.9MB. Free memory was 340.7MB in the beginning and 328.8MB in the end (delta: 11.8MB). Peak memory consumption was 12.6MB. Max. memory is 16.0GB. [2023-08-27 14:50:27,372 INFO L158 Benchmark]: Boogie Procedure Inliner took 23.62ms. Allocated memory is still 364.9MB. Free memory was 328.8MB in the beginning and 326.3MB in the end (delta: 2.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. [2023-08-27 14:50:27,372 INFO L158 Benchmark]: Boogie Preprocessor took 17.38ms. Allocated memory is still 364.9MB. Free memory was 326.3MB in the beginning and 324.7MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. [2023-08-27 14:50:27,372 INFO L158 Benchmark]: RCFGBuilder took 545.37ms. Allocated memory is still 364.9MB. Free memory was 324.7MB in the beginning and 288.0MB in the end (delta: 36.7MB). Peak memory consumption was 35.7MB. Max. memory is 16.0GB. [2023-08-27 14:50:27,373 INFO L158 Benchmark]: TraceAbstraction took 844982.92ms. Allocated memory was 364.9MB in the beginning and 1.2GB in the end (delta: 841.0MB). Free memory was 287.4MB in the beginning and 872.7MB in the end (delta: -585.3MB). Peak memory consumption was 256.1MB. Max. memory is 16.0GB. [2023-08-27 14:50:27,373 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 364.9MB. Free memory was 342.9MB in the beginning and 342.8MB in the end (delta: 86.2kB). There was no memory consumed. Max. memory is 16.0GB. * CACSL2BoogieTranslator took 148.70ms. Allocated memory is still 364.9MB. Free memory was 340.7MB in the beginning and 328.8MB in the end (delta: 11.8MB). Peak memory consumption was 12.6MB. Max. memory is 16.0GB. * Boogie Procedure Inliner took 23.62ms. Allocated memory is still 364.9MB. Free memory was 328.8MB in the beginning and 326.3MB in the end (delta: 2.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. * Boogie Preprocessor took 17.38ms. Allocated memory is still 364.9MB. Free memory was 326.3MB in the beginning and 324.7MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. * RCFGBuilder took 545.37ms. Allocated memory is still 364.9MB. Free memory was 324.7MB in the beginning and 288.0MB in the end (delta: 36.7MB). Peak memory consumption was 35.7MB. Max. memory is 16.0GB. * TraceAbstraction took 844982.92ms. Allocated memory was 364.9MB in the beginning and 1.2GB in the end (delta: 841.0MB). Free memory was 287.4MB in the beginning and 872.7MB in the end (delta: -585.3MB). Peak memory consumption was 256.1MB. Max. memory is 16.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 4.7s, 156 PlacesBefore, 41 PlacesAfterwards, 155 TransitionsBefore, 34 TransitionsAfterwards, 2508 CoEnabledTransitionPairs, 8 FixpointIterations, 83 TrivialSequentialCompositions, 44 ConcurrentSequentialCompositions, 12 TrivialYvCompositions, 4 ConcurrentYvCompositions, 6 ChoiceCompositions, 149 TotalNumberOfCompositions, 2877 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 2334, independent: 2294, independent conditional: 0, independent unconditional: 2294, dependent: 40, dependent conditional: 0, dependent unconditional: 40, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 1266, independent: 1254, independent conditional: 0, independent unconditional: 1254, dependent: 12, dependent conditional: 0, dependent unconditional: 12, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 2334, independent: 1040, independent conditional: 0, independent unconditional: 1040, dependent: 28, dependent conditional: 0, dependent unconditional: 28, unknown: 1266, unknown conditional: 0, unknown unconditional: 1266] , Statistics on independence cache: Total cache size (in pairs): 77, Positive cache size: 73, Positive conditional cache size: 0, Positive unconditional cache size: 73, Negative cache size: 4, Negative conditional cache size: 0, Negative unconditional cache size: 4, Unknown cache size: 0, Unknown conditional cache size: 0, Unknown unconditional cache size: 0 - TimeoutResultAtElement [Line: 21]: Timeout (TraceAbstraction) Unable to prove that assertion always holds Cancelled while CegarLoopForPetriNet was enhancing Floyd-Hoare automaton (35states, 99/318 universal loopers) in iteration 51,while PetriNetUnfolder was constructing finite prefix that currently has 170 conditions, 5 events (0/4 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 2. Compared 2 event pairs, 0 based on Foata normal form. 0/6 useless extension candidates. Maximal degree in co-relation 0. Up to 1 conditions per place.). - TimeoutResultAtElement [Line: 59]: Timeout (TraceAbstraction) Unable to prove that integer overflow can never occur Cancelled while CegarLoopForPetriNet was enhancing Floyd-Hoare automaton (35states, 99/318 universal loopers) in iteration 51,while PetriNetUnfolder was constructing finite prefix that currently has 170 conditions, 5 events (0/4 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 2. Compared 2 event pairs, 0 based on Foata normal form. 0/6 useless extension candidates. Maximal degree in co-relation 0. Up to 1 conditions per place.). - TimeoutResultAtElement [Line: 59]: Timeout (TraceAbstraction) Unable to prove that integer overflow can never occur Cancelled while CegarLoopForPetriNet was enhancing Floyd-Hoare automaton (35states, 99/318 universal loopers) in iteration 51,while PetriNetUnfolder was constructing finite prefix that currently has 170 conditions, 5 events (0/4 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 2. Compared 2 event pairs, 0 based on Foata normal form. 0/6 useless extension candidates. Maximal degree in co-relation 0. Up to 1 conditions per place.). - TimeoutResultAtElement [Line: 75]: Timeout (TraceAbstraction) Unable to prove that integer overflow can never occur Cancelled while CegarLoopForPetriNet was enhancing Floyd-Hoare automaton (35states, 99/318 universal loopers) in iteration 51,while PetriNetUnfolder was constructing finite prefix that currently has 170 conditions, 5 events (0/4 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 2. Compared 2 event pairs, 0 based on Foata normal form. 0/6 useless extension candidates. Maximal degree in co-relation 0. Up to 1 conditions per place.). - TimeoutResultAtElement [Line: 75]: Timeout (TraceAbstraction) Unable to prove that integer overflow can never occur Cancelled while CegarLoopForPetriNet was enhancing Floyd-Hoare automaton (35states, 99/318 universal loopers) in iteration 51,while PetriNetUnfolder was constructing finite prefix that currently has 170 conditions, 5 events (0/4 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 2. Compared 2 event pairs, 0 based on Foata normal form. 0/6 useless extension candidates. Maximal degree in co-relation 0. Up to 1 conditions per place.). - TimeoutResultAtElement [Line: 83]: Timeout (TraceAbstraction) Unable to prove that integer overflow can never occur Cancelled while CegarLoopForPetriNet was enhancing Floyd-Hoare automaton (35states, 99/318 universal loopers) in iteration 51,while PetriNetUnfolder was constructing finite prefix that currently has 170 conditions, 5 events (0/4 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 2. Compared 2 event pairs, 0 based on Foata normal form. 0/6 useless extension candidates. Maximal degree in co-relation 0. Up to 1 conditions per place.). - TimeoutResultAtElement [Line: 83]: Timeout (TraceAbstraction) Unable to prove that integer overflow can never occur Cancelled while CegarLoopForPetriNet was enhancing Floyd-Hoare automaton (35states, 99/318 universal loopers) in iteration 51,while PetriNetUnfolder was constructing finite prefix that currently has 170 conditions, 5 events (0/4 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 2. Compared 2 event pairs, 0 based on Foata normal form. 0/6 useless extension candidates. Maximal degree in co-relation 0. Up to 1 conditions per place.). - TimeoutResultAtElement [Line: 84]: Timeout (TraceAbstraction) Unable to prove that integer overflow can never occur Cancelled while CegarLoopForPetriNet was enhancing Floyd-Hoare automaton (35states, 99/318 universal loopers) in iteration 51,while PetriNetUnfolder was constructing finite prefix that currently has 170 conditions, 5 events (0/4 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 2. Compared 2 event pairs, 0 based on Foata normal form. 0/6 useless extension candidates. Maximal degree in co-relation 0. Up to 1 conditions per place.). - TimeoutResultAtElement [Line: 84]: Timeout (TraceAbstraction) Unable to prove that integer overflow can never occur Cancelled while CegarLoopForPetriNet was enhancing Floyd-Hoare automaton (35states, 99/318 universal loopers) in iteration 51,while PetriNetUnfolder was constructing finite prefix that currently has 170 conditions, 5 events (0/4 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 2. Compared 2 event pairs, 0 based on Foata normal form. 0/6 useless extension candidates. Maximal degree in co-relation 0. Up to 1 conditions per place.). - TimeoutResultAtElement [Line: 86]: Timeout (TraceAbstraction) Unable to prove that integer overflow can never occur Cancelled while CegarLoopForPetriNet was enhancing Floyd-Hoare automaton (35states, 99/318 universal loopers) in iteration 51,while PetriNetUnfolder was constructing finite prefix that currently has 170 conditions, 5 events (0/4 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 2. Compared 2 event pairs, 0 based on Foata normal form. 0/6 useless extension candidates. Maximal degree in co-relation 0. Up to 1 conditions per place.). - TimeoutResultAtElement [Line: 86]: Timeout (TraceAbstraction) Unable to prove that integer overflow can never occur Cancelled while CegarLoopForPetriNet was enhancing Floyd-Hoare automaton (35states, 99/318 universal loopers) in iteration 51,while PetriNetUnfolder was constructing finite prefix that currently has 170 conditions, 5 events (0/4 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 2. Compared 2 event pairs, 0 based on Foata normal form. 0/6 useless extension candidates. Maximal degree in co-relation 0. Up to 1 conditions per place.). - TimeoutResultAtElement [Line: 120]: Timeout (TraceAbstraction) Unable to prove that integer overflow can never occur Cancelled while CegarLoopForPetriNet was enhancing Floyd-Hoare automaton (35states, 99/318 universal loopers) in iteration 51,while PetriNetUnfolder was constructing finite prefix that currently has 170 conditions, 5 events (0/4 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 2. Compared 2 event pairs, 0 based on Foata normal form. 0/6 useless extension candidates. Maximal degree in co-relation 0. Up to 1 conditions per place.). - TimeoutResultAtElement [Line: 120]: Timeout (TraceAbstraction) Unable to prove that integer overflow can never occur Cancelled while CegarLoopForPetriNet was enhancing Floyd-Hoare automaton (35states, 99/318 universal loopers) in iteration 51,while PetriNetUnfolder was constructing finite prefix that currently has 170 conditions, 5 events (0/4 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 2. Compared 2 event pairs, 0 based on Foata normal form. 0/6 useless extension candidates. Maximal degree in co-relation 0. Up to 1 conditions per place.). - TimeoutResultAtElement [Line: 102]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while CegarLoopForPetriNet was enhancing Floyd-Hoare automaton (35states, 99/318 universal loopers) in iteration 51,while PetriNetUnfolder was constructing finite prefix that currently has 170 conditions, 5 events (0/4 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 2. Compared 2 event pairs, 0 based on Foata normal form. 0/6 useless extension candidates. Maximal degree in co-relation 0. Up to 1 conditions per place.). - TimeoutResultAtElement [Line: 103]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while CegarLoopForPetriNet was enhancing Floyd-Hoare automaton (35states, 99/318 universal loopers) in iteration 51,while PetriNetUnfolder was constructing finite prefix that currently has 170 conditions, 5 events (0/4 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 2. Compared 2 event pairs, 0 based on Foata normal form. 0/6 useless extension candidates. Maximal degree in co-relation 0. Up to 1 conditions per place.). - TimeoutResultAtElement [Line: 104]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while CegarLoopForPetriNet was enhancing Floyd-Hoare automaton (35states, 99/318 universal loopers) in iteration 51,while PetriNetUnfolder was constructing finite prefix that currently has 170 conditions, 5 events (0/4 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 2. Compared 2 event pairs, 0 based on Foata normal form. 0/6 useless extension candidates. Maximal degree in co-relation 0. Up to 1 conditions per place.). - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 7 procedures, 209 locations, 26 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: 844.9s, OverallIterations: 51, TraceHistogramMax: 4, PathProgramHistogramMax: 22, EmptinessCheckTime: 0.0s, AutomataDifference: 568.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 4.8s, HoareTripleCheckerStatistics: 196 mSolverCounterUnknown, 8115 SdHoareTripleChecker+Valid, 251.2s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 8115 mSDsluCounter, 0 SdHoareTripleChecker+Invalid, 244.4s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 329 IncrementalHoareTripleChecker+Unchecked, 0 mSDsCounter, 1492 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 35431 IncrementalHoareTripleChecker+Invalid, 37448 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 1492 mSolverCounterUnsat, 0 mSDtfsCounter, 35431 mSolverCounterSat, 0.4s SdHoareTripleChecker+Time, 196 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 2362 GetRequests, 783 SyntacticMatches, 15 SemanticMatches, 1564 ConstructedPredicates, 3 IntricatePredicates, 0 DeprecatedPredicates, 16360 ImplicationChecksByTransitivity, 440.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=22270occurred in iteration=50, InterpolantAutomatonStates: 784, 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: 0.5s SsaConstructionTime, 2.5s SatisfiabilityAnalysisTime, 256.5s InterpolantComputationTime, 1840 NumberOfCodeBlocks, 1810 NumberOfCodeBlocksAsserted, 115 NumberOfCheckSat, 2325 ConstructedInterpolants, 109 QuantifiedInterpolants, 76967 SizeOfPredicates, 661 NumberOfNonLiveVariables, 9707 ConjunctsInSsa, 1456 ConjunctsInUnsatCore, 120 InterpolantComputations, 29 PerfectInterpolantSequences, 147/525 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