/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-min-max-inc.wvr.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-ac9dbd0-m [2023-08-27 14:14:17,022 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-08-27 14:14:17,108 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 14:14:17,113 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-08-27 14:14:17,114 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Checked method. Library mode if empty. [2023-08-27 14:14:17,144 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-27 14:14:17,145 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-27 14:14:17,145 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-27 14:14:17,146 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-27 14:14:17,149 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-08-27 14:14:17,149 INFO L153 SettingsManager]: * Use SBE=true [2023-08-27 14:14:17,150 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-27 14:14:17,150 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-27 14:14:17,151 INFO L153 SettingsManager]: * sizeof long=4 [2023-08-27 14:14:17,151 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-27 14:14:17,151 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-08-27 14:14:17,152 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-08-27 14:14:17,152 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-27 14:14:17,152 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-27 14:14:17,152 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-27 14:14:17,152 INFO L153 SettingsManager]: * sizeof long double=12 [2023-08-27 14:14:17,153 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-08-27 14:14:17,153 INFO L153 SettingsManager]: * Use constant arrays=true [2023-08-27 14:14:17,154 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-27 14:14:17,154 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-27 14:14:17,154 INFO L153 SettingsManager]: * To the following directory=./dump/ [2023-08-27 14:14:17,155 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-27 14:14:17,155 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-27 14:14:17,155 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-27 14:14:17,155 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-27 14:14:17,156 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-27 14:14:17,156 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-27 14:14:17,156 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-27 14:14:17,156 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-27 14:14:17,157 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-27 14:14:17,157 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Order of the error locations to be checked -> PROGRAM_FIRST Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check absence of signed integer overflows -> true [2023-08-27 14:14:17,473 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-27 14:14:17,495 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-27 14:14:17,497 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-27 14:14:17,498 INFO L270 PluginConnector]: Initializing CDTParser... [2023-08-27 14:14:17,498 INFO L274 PluginConnector]: CDTParser initialized [2023-08-27 14:14:17,499 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/popl20-min-max-inc.wvr.c [2023-08-27 14:14:18,707 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-08-27 14:14:18,946 INFO L384 CDTParser]: Found 1 translation units. [2023-08-27 14:14:18,946 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-min-max-inc.wvr.c [2023-08-27 14:14:18,956 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c284b2104/2ea2a009b42c48f5999b07aeb1d1a66c/FLAGe398522f7 [2023-08-27 14:14:18,967 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c284b2104/2ea2a009b42c48f5999b07aeb1d1a66c [2023-08-27 14:14:18,969 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-27 14:14:18,970 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-08-27 14:14:18,972 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-27 14:14:18,972 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-27 14:14:18,974 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-27 14:14:18,975 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.08 02:14:18" (1/1) ... [2023-08-27 14:14:18,976 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@55c5c620 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 02:14:18, skipping insertion in model container [2023-08-27 14:14:18,976 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.08 02:14:18" (1/1) ... [2023-08-27 14:14:18,995 INFO L176 MainTranslator]: Built tables and reachable declarations [2023-08-27 14:14:19,162 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-27 14:14:19,169 INFO L201 MainTranslator]: Completed pre-run [2023-08-27 14:14:19,192 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-27 14:14:19,198 WARN L669 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-08-27 14:14:19,199 WARN L669 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-08-27 14:14:19,204 INFO L206 MainTranslator]: Completed translation [2023-08-27 14:14:19,205 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 02:14:19 WrapperNode [2023-08-27 14:14:19,205 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-27 14:14:19,206 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-27 14:14:19,206 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-27 14:14:19,206 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-27 14:14:19,211 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 02:14:19" (1/1) ... [2023-08-27 14:14:19,219 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 02:14:19" (1/1) ... [2023-08-27 14:14:19,239 INFO L138 Inliner]: procedures = 26, calls = 64, calls flagged for inlining = 9, calls inlined = 9, statements flattened = 149 [2023-08-27 14:14:19,239 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-27 14:14:19,240 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-27 14:14:19,240 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-27 14:14:19,240 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-08-27 14:14:19,246 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 02:14:19" (1/1) ... [2023-08-27 14:14:19,246 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 02:14:19" (1/1) ... [2023-08-27 14:14:19,250 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 02:14:19" (1/1) ... [2023-08-27 14:14:19,250 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 02:14:19" (1/1) ... [2023-08-27 14:14:19,257 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 02:14:19" (1/1) ... [2023-08-27 14:14:19,260 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 02:14:19" (1/1) ... [2023-08-27 14:14:19,262 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 02:14:19" (1/1) ... [2023-08-27 14:14:19,263 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 02:14:19" (1/1) ... [2023-08-27 14:14:19,266 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-27 14:14:19,266 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-27 14:14:19,267 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-08-27 14:14:19,267 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-08-27 14:14:19,267 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 02:14:19" (1/1) ... [2023-08-27 14:14:19,284 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-27 14:14:19,297 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 14:14:19,308 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 14:14:19,314 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 14:14:19,337 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-27 14:14:19,337 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-27 14:14:19,337 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-27 14:14:19,337 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-27 14:14:19,337 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-08-27 14:14:19,337 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-08-27 14:14:19,338 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-08-27 14:14:19,338 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-08-27 14:14:19,338 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2023-08-27 14:14:19,338 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2023-08-27 14:14:19,338 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2023-08-27 14:14:19,338 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2023-08-27 14:14:19,338 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-27 14:14:19,338 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-08-27 14:14:19,338 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-08-27 14:14:19,339 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-08-27 14:14:19,339 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-27 14:14:19,339 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-27 14:14:19,339 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-27 14:14:19,340 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 14:14:19,448 INFO L236 CfgBuilder]: Building ICFG [2023-08-27 14:14:19,450 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-27 14:14:19,859 INFO L277 CfgBuilder]: Performing block encoding [2023-08-27 14:14:19,979 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-27 14:14:19,979 INFO L302 CfgBuilder]: Removed 4 assume(true) statements. [2023-08-27 14:14:19,982 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.08 02:14:19 BoogieIcfgContainer [2023-08-27 14:14:19,982 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-27 14:14:19,984 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-27 14:14:19,984 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-08-27 14:14:19,987 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-08-27 14:14:19,987 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.08 02:14:18" (1/3) ... [2023-08-27 14:14:19,988 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5857f694 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.08 02:14:19, skipping insertion in model container [2023-08-27 14:14:19,988 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 02:14:19" (2/3) ... [2023-08-27 14:14:19,989 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5857f694 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.08 02:14:19, skipping insertion in model container [2023-08-27 14:14:19,989 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.08 02:14:19" (3/3) ... [2023-08-27 14:14:19,990 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-min-max-inc.wvr.c [2023-08-27 14:14:20,006 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-27 14:14:20,006 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 13 error locations. [2023-08-27 14:14:20,009 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-27 14:14:20,084 INFO L144 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2023-08-27 14:14:20,130 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 188 places, 187 transitions, 406 flow [2023-08-27 14:14:20,212 INFO L124 PetriNetUnfolderBase]: 12/183 cut-off events. [2023-08-27 14:14:20,212 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2023-08-27 14:14:20,218 INFO L83 FinitePrefix]: Finished finitePrefix Result has 200 conditions, 183 events. 12/183 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 217 event pairs, 0 based on Foata normal form. 0/158 useless extension candidates. Maximal degree in co-relation 148. Up to 2 conditions per place. [2023-08-27 14:14:20,219 INFO L82 GeneralOperation]: Start removeDead. Operand has 188 places, 187 transitions, 406 flow [2023-08-27 14:14:20,226 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 171 places, 170 transitions, 364 flow [2023-08-27 14:14:20,230 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-27 14:14:20,243 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 171 places, 170 transitions, 364 flow [2023-08-27 14:14:20,247 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 171 places, 170 transitions, 364 flow [2023-08-27 14:14:20,247 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 171 places, 170 transitions, 364 flow [2023-08-27 14:14:20,298 INFO L124 PetriNetUnfolderBase]: 12/170 cut-off events. [2023-08-27 14:14:20,298 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2023-08-27 14:14:20,300 INFO L83 FinitePrefix]: Finished finitePrefix Result has 187 conditions, 170 events. 12/170 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 216 event pairs, 0 based on Foata normal form. 0/146 useless extension candidates. Maximal degree in co-relation 148. Up to 2 conditions per place. [2023-08-27 14:14:20,303 INFO L119 LiptonReduction]: Number of co-enabled transitions 4200 [2023-08-27 14:14:26,420 INFO L134 LiptonReduction]: Checked pairs total: 5985 [2023-08-27 14:14:26,421 INFO L136 LiptonReduction]: Total number of compositions: 165 [2023-08-27 14:14:26,433 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-27 14:14:26,438 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;@5c76d1e0, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-27 14:14:26,438 INFO L358 AbstractCegarLoop]: Starting to check reachability of 27 error locations. [2023-08-27 14:14:26,440 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-27 14:14:26,440 INFO L124 PetriNetUnfolderBase]: 1/2 cut-off events. [2023-08-27 14:14:26,440 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-27 14:14:26,441 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 14:14:26,441 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-27 14:14:26,442 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 24 more)] === [2023-08-27 14:14:26,445 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 14:14:26,446 INFO L85 PathProgramCache]: Analyzing trace with hash 25351, now seen corresponding path program 1 times [2023-08-27 14:14:26,453 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 14:14:26,453 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [155966385] [2023-08-27 14:14:26,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 14:14:26,454 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 14:14:26,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 14:14:26,695 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 14:14:26,695 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 14:14:26,695 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [155966385] [2023-08-27 14:14:26,696 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [155966385] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-27 14:14:26,696 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-27 14:14:26,696 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-27 14:14:26,697 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [446117340] [2023-08-27 14:14:26,698 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-27 14:14:26,704 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-27 14:14:26,708 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 14:14:26,730 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-27 14:14:26,730 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-27 14:14:26,733 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 152 out of 352 [2023-08-27 14:14:26,738 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 43 transitions, 110 flow. Second operand has 3 states, 3 states have (on average 152.66666666666666) internal successors, (458), 3 states have internal predecessors, (458), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:14:26,738 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 14:14:26,738 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 152 of 352 [2023-08-27 14:14:26,739 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 14:14:27,698 INFO L124 PetriNetUnfolderBase]: 7435/9512 cut-off events. [2023-08-27 14:14:27,698 INFO L125 PetriNetUnfolderBase]: For 290/290 co-relation queries the response was YES. [2023-08-27 14:14:27,711 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19666 conditions, 9512 events. 7435/9512 cut-off events. For 290/290 co-relation queries the response was YES. Maximal size of possible extension queue 631. Compared 43807 event pairs, 5195 based on Foata normal form. 0/4484 useless extension candidates. Maximal degree in co-relation 17376. Up to 9500 conditions per place. [2023-08-27 14:14:27,761 INFO L140 encePairwiseOnDemand]: 345/352 looper letters, 39 selfloop transitions, 3 changer transitions 0/43 dead transitions. [2023-08-27 14:14:27,762 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 43 transitions, 194 flow [2023-08-27 14:14:27,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-27 14:14:27,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-27 14:14:27,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 502 transitions. [2023-08-27 14:14:27,780 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4753787878787879 [2023-08-27 14:14:27,781 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 502 transitions. [2023-08-27 14:14:27,781 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 502 transitions. [2023-08-27 14:14:27,784 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 14:14:27,786 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 502 transitions. [2023-08-27 14:14:27,791 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 167.33333333333334) internal successors, (502), 3 states have internal predecessors, (502), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:14:27,797 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 352.0) internal successors, (1408), 4 states have internal predecessors, (1408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:14:27,798 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 352.0) internal successors, (1408), 4 states have internal predecessors, (1408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:14:27,800 INFO L175 Difference]: Start difference. First operand has 52 places, 43 transitions, 110 flow. Second operand 3 states and 502 transitions. [2023-08-27 14:14:27,800 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 43 transitions, 194 flow [2023-08-27 14:14:27,836 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 43 transitions, 178 flow, removed 0 selfloop flow, removed 8 redundant places. [2023-08-27 14:14:27,837 INFO L231 Difference]: Finished difference. Result has 45 places, 43 transitions, 111 flow [2023-08-27 14:14:27,839 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=352, PETRI_DIFFERENCE_MINUEND_FLOW=90, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=111, PETRI_PLACES=45, PETRI_TRANSITIONS=43} [2023-08-27 14:14:27,842 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, -7 predicate places. [2023-08-27 14:14:27,843 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 43 transitions, 111 flow [2023-08-27 14:14:27,843 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 152.66666666666666) internal successors, (458), 3 states have internal predecessors, (458), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:14:27,843 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 14:14:27,844 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-08-27 14:14:27,844 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-27 14:14:27,844 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 24 more)] === [2023-08-27 14:14:27,851 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 14:14:27,852 INFO L85 PathProgramCache]: Analyzing trace with hash 786990, now seen corresponding path program 1 times [2023-08-27 14:14:27,852 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 14:14:27,852 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [875438824] [2023-08-27 14:14:27,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 14:14:27,853 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 14:14:27,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 14:14:27,961 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 14:14:27,962 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 14:14:27,962 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [875438824] [2023-08-27 14:14:27,962 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [875438824] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-27 14:14:27,962 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-27 14:14:27,962 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-27 14:14:27,962 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [943011647] [2023-08-27 14:14:27,962 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-27 14:14:27,963 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-27 14:14:27,963 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 14:14:27,964 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-27 14:14:27,964 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-27 14:14:27,966 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 152 out of 352 [2023-08-27 14:14:27,966 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 43 transitions, 111 flow. Second operand has 3 states, 3 states have (on average 153.0) internal successors, (459), 3 states have internal predecessors, (459), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:14:27,966 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 14:14:27,966 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 152 of 352 [2023-08-27 14:14:27,967 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 14:14:28,764 INFO L124 PetriNetUnfolderBase]: 7435/9511 cut-off events. [2023-08-27 14:14:28,765 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-27 14:14:28,775 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19281 conditions, 9511 events. 7435/9511 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 631. Compared 43894 event pairs, 5195 based on Foata normal form. 0/4484 useless extension candidates. Maximal degree in co-relation 19257. Up to 9496 conditions per place. [2023-08-27 14:14:28,827 INFO L140 encePairwiseOnDemand]: 349/352 looper letters, 38 selfloop transitions, 3 changer transitions 0/42 dead transitions. [2023-08-27 14:14:28,827 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 42 transitions, 189 flow [2023-08-27 14:14:28,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-27 14:14:28,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-27 14:14:28,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 496 transitions. [2023-08-27 14:14:28,829 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4696969696969697 [2023-08-27 14:14:28,829 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 496 transitions. [2023-08-27 14:14:28,829 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 496 transitions. [2023-08-27 14:14:28,829 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 14:14:28,830 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 496 transitions. [2023-08-27 14:14:28,831 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 165.33333333333334) internal successors, (496), 3 states have internal predecessors, (496), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:14:28,833 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 352.0) internal successors, (1408), 4 states have internal predecessors, (1408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:14:28,834 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 352.0) internal successors, (1408), 4 states have internal predecessors, (1408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:14:28,834 INFO L175 Difference]: Start difference. First operand has 45 places, 43 transitions, 111 flow. Second operand 3 states and 496 transitions. [2023-08-27 14:14:28,835 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 42 transitions, 189 flow [2023-08-27 14:14:28,835 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 42 transitions, 184 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-08-27 14:14:28,837 INFO L231 Difference]: Finished difference. Result has 45 places, 42 transitions, 108 flow [2023-08-27 14:14:28,838 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=352, PETRI_DIFFERENCE_MINUEND_FLOW=102, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=108, PETRI_PLACES=45, PETRI_TRANSITIONS=42} [2023-08-27 14:14:28,840 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, -7 predicate places. [2023-08-27 14:14:28,841 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 42 transitions, 108 flow [2023-08-27 14:14:28,842 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 153.0) internal successors, (459), 3 states have internal predecessors, (459), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:14:28,842 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 14:14:28,847 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-08-27 14:14:28,847 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-27 14:14:28,847 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 24 more)] === [2023-08-27 14:14:28,849 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 14:14:28,849 INFO L85 PathProgramCache]: Analyzing trace with hash 787003, now seen corresponding path program 1 times [2023-08-27 14:14:28,850 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 14:14:28,850 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1821876486] [2023-08-27 14:14:28,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 14:14:28,850 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 14:14:28,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 14:14:28,935 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 14:14:28,936 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 14:14:28,936 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1821876486] [2023-08-27 14:14:28,936 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1821876486] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 14:14:28,936 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1851821823] [2023-08-27 14:14:28,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 14:14:28,936 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 14:14:28,937 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 14:14:28,939 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 14:14:29,005 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 14:14:29,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 14:14:29,074 INFO L262 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-27 14:14:29,078 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 14:14:29,105 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 14:14:29,105 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 14:14:29,125 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 14:14:29,126 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1851821823] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 14:14:29,130 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 14:14:29,130 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 5 [2023-08-27 14:14:29,130 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [756419952] [2023-08-27 14:14:29,130 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 14:14:29,130 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-27 14:14:29,131 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 14:14:29,131 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-27 14:14:29,131 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-08-27 14:14:29,133 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 152 out of 352 [2023-08-27 14:14:29,134 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 42 transitions, 108 flow. Second operand has 7 states, 7 states have (on average 153.14285714285714) internal successors, (1072), 7 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 14:14:29,135 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 14:14:29,135 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 152 of 352 [2023-08-27 14:14:29,135 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 14:14:29,934 INFO L124 PetriNetUnfolderBase]: 7438/9517 cut-off events. [2023-08-27 14:14:29,934 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-08-27 14:14:29,942 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19302 conditions, 9517 events. 7438/9517 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 631. Compared 43996 event pairs, 5195 based on Foata normal form. 0/4492 useless extension candidates. Maximal degree in co-relation 19257. Up to 9502 conditions per place. [2023-08-27 14:14:29,982 INFO L140 encePairwiseOnDemand]: 348/352 looper letters, 38 selfloop transitions, 9 changer transitions 0/48 dead transitions. [2023-08-27 14:14:29,982 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 48 transitions, 232 flow [2023-08-27 14:14:29,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-27 14:14:29,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-27 14:14:29,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 962 transitions. [2023-08-27 14:14:29,986 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45549242424242425 [2023-08-27 14:14:29,986 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 962 transitions. [2023-08-27 14:14:29,986 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 962 transitions. [2023-08-27 14:14:29,987 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 14:14:29,987 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 962 transitions. [2023-08-27 14:14:29,989 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 160.33333333333334) internal successors, (962), 6 states have internal predecessors, (962), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:14:29,992 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 352.0) internal successors, (2464), 7 states have internal predecessors, (2464), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:14:29,993 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 352.0) internal successors, (2464), 7 states have internal predecessors, (2464), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:14:29,994 INFO L175 Difference]: Start difference. First operand has 45 places, 42 transitions, 108 flow. Second operand 6 states and 962 transitions. [2023-08-27 14:14:29,994 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 48 transitions, 232 flow [2023-08-27 14:14:29,995 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 48 transitions, 220 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-27 14:14:29,996 INFO L231 Difference]: Finished difference. Result has 51 places, 48 transitions, 163 flow [2023-08-27 14:14:29,996 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=352, PETRI_DIFFERENCE_MINUEND_FLOW=102, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=163, PETRI_PLACES=51, PETRI_TRANSITIONS=48} [2023-08-27 14:14:29,997 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, -1 predicate places. [2023-08-27 14:14:29,997 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 48 transitions, 163 flow [2023-08-27 14:14:29,998 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 153.14285714285714) internal successors, (1072), 7 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 14:14:29,998 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 14:14:29,998 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-08-27 14:14:30,008 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-08-27 14:14:30,203 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 14:14:30,204 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 24 more)] === [2023-08-27 14:14:30,204 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 14:14:30,204 INFO L85 PathProgramCache]: Analyzing trace with hash 1972193309, now seen corresponding path program 1 times [2023-08-27 14:14:30,204 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 14:14:30,204 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2142515048] [2023-08-27 14:14:30,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 14:14:30,205 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 14:14:30,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 14:14:30,259 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 14:14:30,259 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 14:14:30,259 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2142515048] [2023-08-27 14:14:30,259 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2142515048] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-27 14:14:30,260 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-27 14:14:30,260 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-27 14:14:30,260 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1135247486] [2023-08-27 14:14:30,260 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-27 14:14:30,260 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-27 14:14:30,260 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 14:14:30,261 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-27 14:14:30,261 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-27 14:14:30,262 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 154 out of 352 [2023-08-27 14:14:30,262 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 48 transitions, 163 flow. Second operand has 3 states, 3 states have (on average 156.0) internal successors, (468), 3 states have internal predecessors, (468), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:14:30,262 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 14:14:30,263 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 154 of 352 [2023-08-27 14:14:30,263 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 14:14:31,150 INFO L124 PetriNetUnfolderBase]: 8858/11239 cut-off events. [2023-08-27 14:14:31,150 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-08-27 14:14:31,167 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22806 conditions, 11239 events. 8858/11239 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 723. Compared 52830 event pairs, 5195 based on Foata normal form. 0/5305 useless extension candidates. Maximal degree in co-relation 22770. Up to 9810 conditions per place. [2023-08-27 14:14:31,212 INFO L140 encePairwiseOnDemand]: 347/352 looper letters, 66 selfloop transitions, 3 changer transitions 0/70 dead transitions. [2023-08-27 14:14:31,213 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 70 transitions, 348 flow [2023-08-27 14:14:31,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-27 14:14:31,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-27 14:14:31,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 525 transitions. [2023-08-27 14:14:31,215 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4971590909090909 [2023-08-27 14:14:31,215 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 525 transitions. [2023-08-27 14:14:31,215 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 525 transitions. [2023-08-27 14:14:31,215 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 14:14:31,215 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 525 transitions. [2023-08-27 14:14:31,217 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 175.0) internal successors, (525), 3 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 14:14:31,218 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 352.0) internal successors, (1408), 4 states have internal predecessors, (1408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:14:31,219 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 352.0) internal successors, (1408), 4 states have internal predecessors, (1408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:14:31,219 INFO L175 Difference]: Start difference. First operand has 51 places, 48 transitions, 163 flow. Second operand 3 states and 525 transitions. [2023-08-27 14:14:31,219 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 70 transitions, 348 flow [2023-08-27 14:14:31,221 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 70 transitions, 327 flow, removed 9 selfloop flow, removed 1 redundant places. [2023-08-27 14:14:31,223 INFO L231 Difference]: Finished difference. Result has 53 places, 50 transitions, 163 flow [2023-08-27 14:14:31,223 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=352, PETRI_DIFFERENCE_MINUEND_FLOW=142, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=163, PETRI_PLACES=53, PETRI_TRANSITIONS=50} [2023-08-27 14:14:31,224 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 1 predicate places. [2023-08-27 14:14:31,224 INFO L495 AbstractCegarLoop]: Abstraction has has 53 places, 50 transitions, 163 flow [2023-08-27 14:14:31,225 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 156.0) internal successors, (468), 3 states have internal predecessors, (468), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:14:31,225 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 14:14:31,225 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1] [2023-08-27 14:14:31,225 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-08-27 14:14:31,225 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 24 more)] === [2023-08-27 14:14:31,226 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 14:14:31,226 INFO L85 PathProgramCache]: Analyzing trace with hash 1971483860, now seen corresponding path program 2 times [2023-08-27 14:14:31,229 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 14:14:31,229 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [621309317] [2023-08-27 14:14:31,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 14:14:31,230 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 14:14:31,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 14:14:31,354 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 14:14:31,354 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 14:14:31,354 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [621309317] [2023-08-27 14:14:31,354 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [621309317] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 14:14:31,354 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [420103520] [2023-08-27 14:14:31,354 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-27 14:14:31,355 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 14:14:31,355 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 14:14:31,356 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 14:14:31,386 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 14:14:31,445 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-08-27 14:14:31,445 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 14:14:31,446 INFO L262 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-27 14:14:31,447 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 14:14:31,462 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 14:14:31,462 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-27 14:14:31,462 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [420103520] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-27 14:14:31,462 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-27 14:14:31,462 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [5] total 6 [2023-08-27 14:14:31,462 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [462378245] [2023-08-27 14:14:31,463 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-27 14:14:31,463 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-27 14:14:31,463 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 14:14:31,464 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-27 14:14:31,464 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2023-08-27 14:14:31,464 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 153 out of 352 [2023-08-27 14:14:31,465 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 50 transitions, 163 flow. Second operand has 3 states, 3 states have (on average 154.0) internal successors, (462), 3 states have internal predecessors, (462), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:14:31,465 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 14:14:31,465 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 153 of 352 [2023-08-27 14:14:31,465 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 14:14:32,251 INFO L124 PetriNetUnfolderBase]: 8842/11222 cut-off events. [2023-08-27 14:14:32,251 INFO L125 PetriNetUnfolderBase]: For 1500/1500 co-relation queries the response was YES. [2023-08-27 14:14:32,263 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25458 conditions, 11222 events. 8842/11222 cut-off events. For 1500/1500 co-relation queries the response was YES. Maximal size of possible extension queue 721. Compared 51697 event pairs, 6017 based on Foata normal form. 1/5299 useless extension candidates. Maximal degree in co-relation 25431. Up to 11208 conditions per place. [2023-08-27 14:14:32,308 INFO L140 encePairwiseOnDemand]: 350/352 looper letters, 47 selfloop transitions, 1 changer transitions 0/49 dead transitions. [2023-08-27 14:14:32,308 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 49 transitions, 249 flow [2023-08-27 14:14:32,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-27 14:14:32,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-27 14:14:32,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 498 transitions. [2023-08-27 14:14:32,310 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4715909090909091 [2023-08-27 14:14:32,310 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 498 transitions. [2023-08-27 14:14:32,310 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 498 transitions. [2023-08-27 14:14:32,311 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 14:14:32,311 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 498 transitions. [2023-08-27 14:14:32,312 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 166.0) internal successors, (498), 3 states have internal predecessors, (498), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:14:32,314 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 352.0) internal successors, (1408), 4 states have internal predecessors, (1408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:14:32,314 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 352.0) internal successors, (1408), 4 states have internal predecessors, (1408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:14:32,315 INFO L175 Difference]: Start difference. First operand has 53 places, 50 transitions, 163 flow. Second operand 3 states and 498 transitions. [2023-08-27 14:14:32,315 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 49 transitions, 249 flow [2023-08-27 14:14:32,316 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 49 transitions, 228 flow, removed 3 selfloop flow, removed 5 redundant places. [2023-08-27 14:14:32,317 INFO L231 Difference]: Finished difference. Result has 49 places, 49 transitions, 134 flow [2023-08-27 14:14:32,317 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=352, PETRI_DIFFERENCE_MINUEND_FLOW=132, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=134, PETRI_PLACES=49, PETRI_TRANSITIONS=49} [2023-08-27 14:14:32,318 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, -3 predicate places. [2023-08-27 14:14:32,318 INFO L495 AbstractCegarLoop]: Abstraction has has 49 places, 49 transitions, 134 flow [2023-08-27 14:14:32,318 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 154.0) internal successors, (462), 3 states have internal predecessors, (462), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:14:32,318 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 14:14:32,318 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-08-27 14:14:32,325 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 14:14:32,523 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 14:14:32,523 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 24 more)] === [2023-08-27 14:14:32,523 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 14:14:32,524 INFO L85 PathProgramCache]: Analyzing trace with hash 1008451137, now seen corresponding path program 1 times [2023-08-27 14:14:32,524 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 14:14:32,524 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [598541415] [2023-08-27 14:14:32,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 14:14:32,525 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 14:14:32,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 14:14:32,583 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 14:14:32,584 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 14:14:32,584 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [598541415] [2023-08-27 14:14:32,584 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [598541415] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 14:14:32,584 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1838258670] [2023-08-27 14:14:32,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 14:14:32,584 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 14:14:32,585 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 14:14:32,586 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 14:14:32,607 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 14:14:32,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 14:14:32,678 INFO L262 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 5 conjunts are in the unsatisfiable core [2023-08-27 14:14:32,680 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 14:14:32,697 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 14:14:32,697 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-27 14:14:32,698 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1838258670] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-27 14:14:32,698 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-27 14:14:32,698 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [3] total 5 [2023-08-27 14:14:32,698 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1017139371] [2023-08-27 14:14:32,698 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-27 14:14:32,699 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-27 14:14:32,699 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 14:14:32,700 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-27 14:14:32,700 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-27 14:14:32,701 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 148 out of 352 [2023-08-27 14:14:32,701 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 49 transitions, 134 flow. Second operand has 3 states, 3 states have (on average 150.33333333333334) internal successors, (451), 3 states have internal predecessors, (451), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:14:32,701 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 14:14:32,701 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 148 of 352 [2023-08-27 14:14:32,701 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 14:14:33,373 INFO L124 PetriNetUnfolderBase]: 8841/11221 cut-off events. [2023-08-27 14:14:33,373 INFO L125 PetriNetUnfolderBase]: For 894/894 co-relation queries the response was YES. [2023-08-27 14:14:33,388 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24542 conditions, 11221 events. 8841/11221 cut-off events. For 894/894 co-relation queries the response was YES. Maximal size of possible extension queue 721. Compared 51659 event pairs, 6017 based on Foata normal form. 1/5598 useless extension candidates. Maximal degree in co-relation 24533. Up to 11207 conditions per place. [2023-08-27 14:14:33,428 INFO L140 encePairwiseOnDemand]: 349/352 looper letters, 45 selfloop transitions, 2 changer transitions 0/48 dead transitions. [2023-08-27 14:14:33,428 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 48 transitions, 224 flow [2023-08-27 14:14:33,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-27 14:14:33,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-27 14:14:33,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 484 transitions. [2023-08-27 14:14:33,430 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4583333333333333 [2023-08-27 14:14:33,430 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 484 transitions. [2023-08-27 14:14:33,430 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 484 transitions. [2023-08-27 14:14:33,431 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 14:14:33,431 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 484 transitions. [2023-08-27 14:14:33,432 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 161.33333333333334) internal successors, (484), 3 states have internal predecessors, (484), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:14:33,433 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 352.0) internal successors, (1408), 4 states have internal predecessors, (1408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:14:33,434 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 352.0) internal successors, (1408), 4 states have internal predecessors, (1408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:14:33,434 INFO L175 Difference]: Start difference. First operand has 49 places, 49 transitions, 134 flow. Second operand 3 states and 484 transitions. [2023-08-27 14:14:33,434 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 48 transitions, 224 flow [2023-08-27 14:14:33,435 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 48 transitions, 223 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-27 14:14:33,436 INFO L231 Difference]: Finished difference. Result has 50 places, 48 transitions, 133 flow [2023-08-27 14:14:33,436 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=352, PETRI_DIFFERENCE_MINUEND_FLOW=129, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=133, PETRI_PLACES=50, PETRI_TRANSITIONS=48} [2023-08-27 14:14:33,437 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, -2 predicate places. [2023-08-27 14:14:33,437 INFO L495 AbstractCegarLoop]: Abstraction has has 50 places, 48 transitions, 133 flow [2023-08-27 14:14:33,438 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 150.33333333333334) internal successors, (451), 3 states have internal predecessors, (451), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:14:33,438 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 14:14:33,438 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 14:14:33,447 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-08-27 14:14:33,642 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 14:14:33,642 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 24 more)] === [2023-08-27 14:14:33,643 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 14:14:33,643 INFO L85 PathProgramCache]: Analyzing trace with hash 537427834, now seen corresponding path program 1 times [2023-08-27 14:14:33,643 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 14:14:33,643 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2086395751] [2023-08-27 14:14:33,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 14:14:33,643 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 14:14:33,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 14:14:33,687 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-27 14:14:33,687 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 14:14:33,687 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2086395751] [2023-08-27 14:14:33,687 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2086395751] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 14:14:33,687 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1211286341] [2023-08-27 14:14:33,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 14:14:33,688 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 14:14:33,688 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 14:14:33,689 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 14:14:33,691 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 14:14:33,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 14:14:33,776 INFO L262 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 8 conjunts are in the unsatisfiable core [2023-08-27 14:14:33,777 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 14:14:33,831 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 14:14:33,831 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 14:14:33,892 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 14:14:33,892 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1211286341] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 14:14:33,892 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 14:14:33,892 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 5, 5] total 12 [2023-08-27 14:14:33,893 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [927219474] [2023-08-27 14:14:33,893 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 14:14:33,893 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-08-27 14:14:33,893 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 14:14:33,893 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-08-27 14:14:33,894 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2023-08-27 14:14:33,895 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 134 out of 352 [2023-08-27 14:14:33,897 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 48 transitions, 133 flow. Second operand has 13 states, 13 states have (on average 135.69230769230768) internal successors, (1764), 13 states have internal predecessors, (1764), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:14:33,897 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 14:14:33,897 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 134 of 352 [2023-08-27 14:14:33,897 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 14:14:35,137 INFO L124 PetriNetUnfolderBase]: 15215/19308 cut-off events. [2023-08-27 14:14:35,137 INFO L125 PetriNetUnfolderBase]: For 810/810 co-relation queries the response was YES. [2023-08-27 14:14:35,159 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42472 conditions, 19308 events. 15215/19308 cut-off events. For 810/810 co-relation queries the response was YES. Maximal size of possible extension queue 968. Compared 95800 event pairs, 6410 based on Foata normal form. 0/10101 useless extension candidates. Maximal degree in co-relation 42462. Up to 8127 conditions per place. [2023-08-27 14:14:35,211 INFO L140 encePairwiseOnDemand]: 342/352 looper letters, 144 selfloop transitions, 14 changer transitions 0/159 dead transitions. [2023-08-27 14:14:35,211 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 159 transitions, 703 flow [2023-08-27 14:14:35,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-08-27 14:14:35,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-08-27 14:14:35,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1370 transitions. [2023-08-27 14:14:35,217 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.432449494949495 [2023-08-27 14:14:35,217 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1370 transitions. [2023-08-27 14:14:35,217 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1370 transitions. [2023-08-27 14:14:35,218 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 14:14:35,218 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1370 transitions. [2023-08-27 14:14:35,221 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 152.22222222222223) internal successors, (1370), 9 states have internal predecessors, (1370), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:14:35,225 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 352.0) internal successors, (3520), 10 states have internal predecessors, (3520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:14:35,226 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 352.0) internal successors, (3520), 10 states have internal predecessors, (3520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:14:35,226 INFO L175 Difference]: Start difference. First operand has 50 places, 48 transitions, 133 flow. Second operand 9 states and 1370 transitions. [2023-08-27 14:14:35,226 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 159 transitions, 703 flow [2023-08-27 14:14:35,229 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 159 transitions, 699 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-27 14:14:35,231 INFO L231 Difference]: Finished difference. Result has 61 places, 55 transitions, 229 flow [2023-08-27 14:14:35,231 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=352, PETRI_DIFFERENCE_MINUEND_FLOW=129, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=229, PETRI_PLACES=61, PETRI_TRANSITIONS=55} [2023-08-27 14:14:35,232 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 9 predicate places. [2023-08-27 14:14:35,232 INFO L495 AbstractCegarLoop]: Abstraction has has 61 places, 55 transitions, 229 flow [2023-08-27 14:14:35,232 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 135.69230769230768) internal successors, (1764), 13 states have internal predecessors, (1764), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:14:35,233 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 14:14:35,233 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 14:14:35,242 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 14:14:35,437 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 14:14:35,437 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 24 more)] === [2023-08-27 14:14:35,438 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 14:14:35,438 INFO L85 PathProgramCache]: Analyzing trace with hash -342827932, now seen corresponding path program 1 times [2023-08-27 14:14:35,438 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 14:14:35,438 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1724823814] [2023-08-27 14:14:35,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 14:14:35,438 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 14:14:35,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 14:14:35,483 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 14:14:35,483 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 14:14:35,484 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1724823814] [2023-08-27 14:14:35,484 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1724823814] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-27 14:14:35,484 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-27 14:14:35,484 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-27 14:14:35,484 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [604775671] [2023-08-27 14:14:35,484 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-27 14:14:35,484 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-27 14:14:35,485 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 14:14:35,485 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-27 14:14:35,485 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-27 14:14:35,486 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 154 out of 352 [2023-08-27 14:14:35,486 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 55 transitions, 229 flow. Second operand has 3 states, 3 states have (on average 157.0) internal successors, (471), 3 states have internal predecessors, (471), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:14:35,486 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 14:14:35,486 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 154 of 352 [2023-08-27 14:14:35,486 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 14:14:36,867 INFO L124 PetriNetUnfolderBase]: 18527/23310 cut-off events. [2023-08-27 14:14:36,868 INFO L125 PetriNetUnfolderBase]: For 27998/27998 co-relation queries the response was YES. [2023-08-27 14:14:36,909 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63403 conditions, 23310 events. 18527/23310 cut-off events. For 27998/27998 co-relation queries the response was YES. Maximal size of possible extension queue 1088. Compared 112907 event pairs, 10094 based on Foata normal form. 436/15423 useless extension candidates. Maximal degree in co-relation 63388. Up to 19973 conditions per place. [2023-08-27 14:14:36,989 INFO L140 encePairwiseOnDemand]: 347/352 looper letters, 82 selfloop transitions, 3 changer transitions 0/86 dead transitions. [2023-08-27 14:14:36,989 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 86 transitions, 545 flow [2023-08-27 14:14:36,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-27 14:14:36,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-27 14:14:36,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 524 transitions. [2023-08-27 14:14:36,991 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4962121212121212 [2023-08-27 14:14:36,991 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 524 transitions. [2023-08-27 14:14:36,991 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 524 transitions. [2023-08-27 14:14:36,992 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 14:14:36,992 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 524 transitions. [2023-08-27 14:14:36,993 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 174.66666666666666) internal successors, (524), 3 states have internal predecessors, (524), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:14:36,995 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 352.0) internal successors, (1408), 4 states have internal predecessors, (1408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:14:36,995 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 352.0) internal successors, (1408), 4 states have internal predecessors, (1408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:14:36,995 INFO L175 Difference]: Start difference. First operand has 61 places, 55 transitions, 229 flow. Second operand 3 states and 524 transitions. [2023-08-27 14:14:36,995 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 86 transitions, 545 flow [2023-08-27 14:14:37,017 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 86 transitions, 524 flow, removed 2 selfloop flow, removed 3 redundant places. [2023-08-27 14:14:37,018 INFO L231 Difference]: Finished difference. Result has 61 places, 57 transitions, 237 flow [2023-08-27 14:14:37,019 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=352, PETRI_DIFFERENCE_MINUEND_FLOW=216, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=237, PETRI_PLACES=61, PETRI_TRANSITIONS=57} [2023-08-27 14:14:37,019 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 9 predicate places. [2023-08-27 14:14:37,019 INFO L495 AbstractCegarLoop]: Abstraction has has 61 places, 57 transitions, 237 flow [2023-08-27 14:14:37,020 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 157.0) internal successors, (471), 3 states have internal predecessors, (471), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:14:37,020 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 14:14:37,020 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1] [2023-08-27 14:14:37,020 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-08-27 14:14:37,020 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 24 more)] === [2023-08-27 14:14:37,020 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 14:14:37,020 INFO L85 PathProgramCache]: Analyzing trace with hash 2093533535, now seen corresponding path program 1 times [2023-08-27 14:14:37,020 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 14:14:37,021 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [863048396] [2023-08-27 14:14:37,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 14:14:37,021 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 14:14:37,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 14:14:37,066 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-27 14:14:37,067 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 14:14:37,067 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [863048396] [2023-08-27 14:14:37,067 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [863048396] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-27 14:14:37,068 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-27 14:14:37,068 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-27 14:14:37,068 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1501031096] [2023-08-27 14:14:37,068 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-27 14:14:37,069 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-27 14:14:37,069 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 14:14:37,069 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-27 14:14:37,069 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-27 14:14:37,070 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 154 out of 352 [2023-08-27 14:14:37,070 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 57 transitions, 237 flow. Second operand has 3 states, 3 states have (on average 157.0) internal successors, (471), 3 states have internal predecessors, (471), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:14:37,071 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 14:14:37,071 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 154 of 352 [2023-08-27 14:14:37,071 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 14:14:38,310 INFO L124 PetriNetUnfolderBase]: 16851/21282 cut-off events. [2023-08-27 14:14:38,311 INFO L125 PetriNetUnfolderBase]: For 15819/15824 co-relation queries the response was YES. [2023-08-27 14:14:38,358 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61369 conditions, 21282 events. 16851/21282 cut-off events. For 15819/15824 co-relation queries the response was YES. Maximal size of possible extension queue 1044. Compared 106921 event pairs, 5754 based on Foata normal form. 708/14220 useless extension candidates. Maximal degree in co-relation 61353. Up to 11667 conditions per place. [2023-08-27 14:14:38,430 INFO L140 encePairwiseOnDemand]: 349/352 looper letters, 69 selfloop transitions, 7 changer transitions 0/77 dead transitions. [2023-08-27 14:14:38,430 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 77 transitions, 449 flow [2023-08-27 14:14:38,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-27 14:14:38,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-27 14:14:38,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 520 transitions. [2023-08-27 14:14:38,432 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49242424242424243 [2023-08-27 14:14:38,432 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 520 transitions. [2023-08-27 14:14:38,432 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 520 transitions. [2023-08-27 14:14:38,433 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 14:14:38,433 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 520 transitions. [2023-08-27 14:14:38,434 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 173.33333333333334) internal successors, (520), 3 states have internal predecessors, (520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:14:38,436 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 352.0) internal successors, (1408), 4 states have internal predecessors, (1408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:14:38,436 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 352.0) internal successors, (1408), 4 states have internal predecessors, (1408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:14:38,436 INFO L175 Difference]: Start difference. First operand has 61 places, 57 transitions, 237 flow. Second operand 3 states and 520 transitions. [2023-08-27 14:14:38,436 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 77 transitions, 449 flow [2023-08-27 14:14:38,548 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 77 transitions, 429 flow, removed 5 selfloop flow, removed 2 redundant places. [2023-08-27 14:14:38,549 INFO L231 Difference]: Finished difference. Result has 60 places, 55 transitions, 220 flow [2023-08-27 14:14:38,549 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=352, PETRI_DIFFERENCE_MINUEND_FLOW=206, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=220, PETRI_PLACES=60, PETRI_TRANSITIONS=55} [2023-08-27 14:14:38,550 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 8 predicate places. [2023-08-27 14:14:38,550 INFO L495 AbstractCegarLoop]: Abstraction has has 60 places, 55 transitions, 220 flow [2023-08-27 14:14:38,550 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 157.0) internal successors, (471), 3 states have internal predecessors, (471), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:14:38,550 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 14:14:38,550 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1] [2023-08-27 14:14:38,550 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-08-27 14:14:38,551 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 24 more)] === [2023-08-27 14:14:38,551 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 14:14:38,551 INFO L85 PathProgramCache]: Analyzing trace with hash 2093533565, now seen corresponding path program 2 times [2023-08-27 14:14:38,551 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 14:14:38,551 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [438955361] [2023-08-27 14:14:38,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 14:14:38,551 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 14:14:38,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 14:14:38,604 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 14:14:38,604 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 14:14:38,604 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [438955361] [2023-08-27 14:14:38,604 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [438955361] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 14:14:38,604 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1605294357] [2023-08-27 14:14:38,604 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-27 14:14:38,605 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 14:14:38,605 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 14:14:38,606 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 14:14:38,633 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 14:14:38,702 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-08-27 14:14:38,702 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 14:14:38,704 INFO L262 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-27 14:14:38,704 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 14:14:38,719 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 14:14:38,719 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-27 14:14:38,720 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1605294357] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-27 14:14:38,720 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-27 14:14:38,720 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [4] total 5 [2023-08-27 14:14:38,720 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1183786945] [2023-08-27 14:14:38,720 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-27 14:14:38,720 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-27 14:14:38,720 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 14:14:38,721 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-27 14:14:38,721 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2023-08-27 14:14:38,722 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 150 out of 352 [2023-08-27 14:14:38,722 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 55 transitions, 220 flow. Second operand has 3 states, 3 states have (on average 152.66666666666666) internal successors, (458), 3 states have internal predecessors, (458), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:14:38,722 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 14:14:38,722 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 150 of 352 [2023-08-27 14:14:38,722 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 14:14:39,588 INFO L124 PetriNetUnfolderBase]: 12377/15614 cut-off events. [2023-08-27 14:14:39,588 INFO L125 PetriNetUnfolderBase]: For 21059/21059 co-relation queries the response was YES. [2023-08-27 14:14:39,616 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41319 conditions, 15614 events. 12377/15614 cut-off events. For 21059/21059 co-relation queries the response was YES. Maximal size of possible extension queue 761. Compared 71097 event pairs, 7918 based on Foata normal form. 931/11062 useless extension candidates. Maximal degree in co-relation 41304. Up to 15598 conditions per place. [2023-08-27 14:14:39,665 INFO L140 encePairwiseOnDemand]: 348/352 looper letters, 50 selfloop transitions, 1 changer transitions 0/52 dead transitions. [2023-08-27 14:14:39,665 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 52 transitions, 296 flow [2023-08-27 14:14:39,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-27 14:14:39,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-27 14:14:39,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 487 transitions. [2023-08-27 14:14:39,667 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46117424242424243 [2023-08-27 14:14:39,667 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 487 transitions. [2023-08-27 14:14:39,667 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 487 transitions. [2023-08-27 14:14:39,667 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 14:14:39,667 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 487 transitions. [2023-08-27 14:14:39,668 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 162.33333333333334) internal successors, (487), 3 states have internal predecessors, (487), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:14:39,669 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 352.0) internal successors, (1408), 4 states have internal predecessors, (1408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:14:39,670 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 352.0) internal successors, (1408), 4 states have internal predecessors, (1408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:14:39,670 INFO L175 Difference]: Start difference. First operand has 60 places, 55 transitions, 220 flow. Second operand 3 states and 487 transitions. [2023-08-27 14:14:39,670 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 52 transitions, 296 flow [2023-08-27 14:14:39,686 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 52 transitions, 273 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-08-27 14:14:39,687 INFO L231 Difference]: Finished difference. Result has 55 places, 52 transitions, 173 flow [2023-08-27 14:14:39,687 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=352, PETRI_DIFFERENCE_MINUEND_FLOW=171, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=52, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=173, PETRI_PLACES=55, PETRI_TRANSITIONS=52} [2023-08-27 14:14:39,687 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 3 predicate places. [2023-08-27 14:14:39,687 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 52 transitions, 173 flow [2023-08-27 14:14:39,688 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 152.66666666666666) internal successors, (458), 3 states have internal predecessors, (458), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:14:39,688 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 14:14:39,688 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 14:14:39,694 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-08-27 14:14:39,893 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-08-27 14:14:39,893 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting thread3Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 24 more)] === [2023-08-27 14:14:39,893 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 14:14:39,893 INFO L85 PathProgramCache]: Analyzing trace with hash -2031996057, now seen corresponding path program 1 times [2023-08-27 14:14:39,894 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 14:14:39,894 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [68098797] [2023-08-27 14:14:39,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 14:14:39,894 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 14:14:39,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 14:14:39,952 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 14:14:39,952 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 14:14:39,952 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [68098797] [2023-08-27 14:14:39,952 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [68098797] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-27 14:14:39,953 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-27 14:14:39,953 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-27 14:14:39,954 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1032672208] [2023-08-27 14:14:39,954 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-27 14:14:39,955 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-27 14:14:39,955 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 14:14:39,955 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-27 14:14:39,955 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-27 14:14:39,956 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 154 out of 352 [2023-08-27 14:14:39,956 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 52 transitions, 173 flow. Second operand has 3 states, 3 states have (on average 157.33333333333334) internal successors, (472), 3 states have internal predecessors, (472), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:14:39,956 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 14:14:39,956 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 154 of 352 [2023-08-27 14:14:39,957 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 14:14:40,960 INFO L124 PetriNetUnfolderBase]: 15367/19828 cut-off events. [2023-08-27 14:14:40,961 INFO L125 PetriNetUnfolderBase]: For 9246/9246 co-relation queries the response was YES. [2023-08-27 14:14:41,005 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50126 conditions, 19828 events. 15367/19828 cut-off events. For 9246/9246 co-relation queries the response was YES. Maximal size of possible extension queue 578. Compared 87544 event pairs, 7964 based on Foata normal form. 0/14199 useless extension candidates. Maximal degree in co-relation 50112. Up to 14489 conditions per place. [2023-08-27 14:14:41,066 INFO L140 encePairwiseOnDemand]: 348/352 looper letters, 80 selfloop transitions, 3 changer transitions 0/83 dead transitions. [2023-08-27 14:14:41,066 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 83 transitions, 447 flow [2023-08-27 14:14:41,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-27 14:14:41,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-27 14:14:41,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 519 transitions. [2023-08-27 14:14:41,068 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4914772727272727 [2023-08-27 14:14:41,068 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 519 transitions. [2023-08-27 14:14:41,068 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 519 transitions. [2023-08-27 14:14:41,069 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 14:14:41,069 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 519 transitions. [2023-08-27 14:14:41,070 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 173.0) internal successors, (519), 3 states have internal predecessors, (519), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:14:41,071 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 352.0) internal successors, (1408), 4 states have internal predecessors, (1408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:14:41,072 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 352.0) internal successors, (1408), 4 states have internal predecessors, (1408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:14:41,072 INFO L175 Difference]: Start difference. First operand has 55 places, 52 transitions, 173 flow. Second operand 3 states and 519 transitions. [2023-08-27 14:14:41,072 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 83 transitions, 447 flow [2023-08-27 14:14:41,087 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 83 transitions, 446 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-27 14:14:41,088 INFO L231 Difference]: Finished difference. Result has 57 places, 54 transitions, 191 flow [2023-08-27 14:14:41,088 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=352, PETRI_DIFFERENCE_MINUEND_FLOW=172, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=52, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=191, PETRI_PLACES=57, PETRI_TRANSITIONS=54} [2023-08-27 14:14:41,089 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 5 predicate places. [2023-08-27 14:14:41,089 INFO L495 AbstractCegarLoop]: Abstraction has has 57 places, 54 transitions, 191 flow [2023-08-27 14:14:41,089 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 157.33333333333334) internal successors, (472), 3 states have internal predecessors, (472), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:14:41,089 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 14:14:41,089 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 14:14:41,090 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-08-27 14:14:41,090 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting thread3Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 24 more)] === [2023-08-27 14:14:41,090 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 14:14:41,090 INFO L85 PathProgramCache]: Analyzing trace with hash -2031996117, now seen corresponding path program 1 times [2023-08-27 14:14:41,090 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 14:14:41,090 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1369805748] [2023-08-27 14:14:41,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 14:14:41,090 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 14:14:41,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 14:14:41,541 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 14:14:41,541 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 14:14:41,541 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1369805748] [2023-08-27 14:14:41,541 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1369805748] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 14:14:41,541 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1708888218] [2023-08-27 14:14:41,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 14:14:41,542 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 14:14:41,542 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 14:14:41,543 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 14:14:41,564 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 14:14:41,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 14:14:41,650 INFO L262 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 28 conjunts are in the unsatisfiable core [2023-08-27 14:14:41,652 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 14:14:41,710 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 14:14:41,762 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-27 14:14:41,763 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 16 treesize of output 18 [2023-08-27 14:14:41,804 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-27 14:14:41,805 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 16 treesize of output 18 [2023-08-27 14:14:41,838 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-27 14:14:41,839 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 16 treesize of output 18 [2023-08-27 14:14:41,864 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 14:14:41,864 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 14:14:41,901 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_463 (Array Int Int))) (< 0 (+ (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_463) c_~A~0.base) c_~A~0.offset) 2147483650))) is different from false [2023-08-27 14:14:41,994 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 14:14:41,994 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 31 [2023-08-27 14:14:42,013 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 14:14:42,014 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 1107 treesize of output 1075 [2023-08-27 14:14:42,033 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 58 treesize of output 50 [2023-08-27 14:14:42,053 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 61 treesize of output 59 [2023-08-27 14:14:42,059 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 59 treesize of output 55 [2023-08-27 14:14:42,117 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 14:14:42,118 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1708888218] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 14:14:42,118 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 14:14:42,118 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 17 [2023-08-27 14:14:42,118 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1894532623] [2023-08-27 14:14:42,118 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 14:14:42,118 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-08-27 14:14:42,119 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 14:14:42,119 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-08-27 14:14:42,119 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=239, Unknown=8, NotChecked=32, Total=342 [2023-08-27 14:14:42,121 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 122 out of 352 [2023-08-27 14:14:42,123 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 54 transitions, 191 flow. Second operand has 19 states, 19 states have (on average 123.52631578947368) internal successors, (2347), 19 states have internal predecessors, (2347), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:14:42,124 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 14:14:42,124 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 122 of 352 [2023-08-27 14:14:42,124 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 14:14:43,883 INFO L124 PetriNetUnfolderBase]: 16437/21378 cut-off events. [2023-08-27 14:14:43,883 INFO L125 PetriNetUnfolderBase]: For 13231/13231 co-relation queries the response was YES. [2023-08-27 14:14:43,944 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59227 conditions, 21378 events. 16437/21378 cut-off events. For 13231/13231 co-relation queries the response was YES. Maximal size of possible extension queue 644. Compared 96183 event pairs, 2412 based on Foata normal form. 66/16723 useless extension candidates. Maximal degree in co-relation 59212. Up to 17102 conditions per place. [2023-08-27 14:14:44,022 INFO L140 encePairwiseOnDemand]: 343/352 looper letters, 133 selfloop transitions, 14 changer transitions 0/147 dead transitions. [2023-08-27 14:14:44,022 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 147 transitions, 861 flow [2023-08-27 14:14:44,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-08-27 14:14:44,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-08-27 14:14:44,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1066 transitions. [2023-08-27 14:14:44,026 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37855113636363635 [2023-08-27 14:14:44,026 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1066 transitions. [2023-08-27 14:14:44,026 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1066 transitions. [2023-08-27 14:14:44,027 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 14:14:44,027 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1066 transitions. [2023-08-27 14:14:44,030 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 133.25) internal successors, (1066), 8 states have internal predecessors, (1066), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:14:44,033 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 352.0) internal successors, (3168), 9 states have internal predecessors, (3168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:14:44,034 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 352.0) internal successors, (3168), 9 states have internal predecessors, (3168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:14:44,034 INFO L175 Difference]: Start difference. First operand has 57 places, 54 transitions, 191 flow. Second operand 8 states and 1066 transitions. [2023-08-27 14:14:44,034 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 147 transitions, 861 flow [2023-08-27 14:14:44,058 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 147 transitions, 855 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-27 14:14:44,064 INFO L231 Difference]: Finished difference. Result has 65 places, 60 transitions, 257 flow [2023-08-27 14:14:44,065 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=352, PETRI_DIFFERENCE_MINUEND_FLOW=188, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=257, PETRI_PLACES=65, PETRI_TRANSITIONS=60} [2023-08-27 14:14:44,067 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 13 predicate places. [2023-08-27 14:14:44,067 INFO L495 AbstractCegarLoop]: Abstraction has has 65 places, 60 transitions, 257 flow [2023-08-27 14:14:44,068 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 123.52631578947368) internal successors, (2347), 19 states have internal predecessors, (2347), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:14:44,068 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 14:14:44,068 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 14:14:44,080 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 14:14:44,273 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 14:14:44,273 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 24 more)] === [2023-08-27 14:14:44,274 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 14:14:44,274 INFO L85 PathProgramCache]: Analyzing trace with hash -2037729565, now seen corresponding path program 1 times [2023-08-27 14:14:44,274 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 14:14:44,274 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [81354629] [2023-08-27 14:14:44,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 14:14:44,274 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 14:14:44,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 14:14:44,311 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-27 14:14:44,312 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 14:14:44,312 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [81354629] [2023-08-27 14:14:44,312 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [81354629] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-27 14:14:44,312 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-27 14:14:44,312 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-27 14:14:44,312 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [992152505] [2023-08-27 14:14:44,312 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-27 14:14:44,313 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-27 14:14:44,314 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 14:14:44,314 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-27 14:14:44,314 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-27 14:14:44,315 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 154 out of 352 [2023-08-27 14:14:44,315 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 60 transitions, 257 flow. Second operand has 3 states, 3 states have (on average 157.33333333333334) internal successors, (472), 3 states have internal predecessors, (472), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:14:44,316 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 14:14:44,316 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 154 of 352 [2023-08-27 14:14:44,316 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 14:14:45,427 INFO L124 PetriNetUnfolderBase]: 13303/17405 cut-off events. [2023-08-27 14:14:45,428 INFO L125 PetriNetUnfolderBase]: For 12101/12217 co-relation queries the response was YES. [2023-08-27 14:14:45,454 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50102 conditions, 17405 events. 13303/17405 cut-off events. For 12101/12217 co-relation queries the response was YES. Maximal size of possible extension queue 554. Compared 80257 event pairs, 4829 based on Foata normal form. 116/14628 useless extension candidates. Maximal degree in co-relation 50084. Up to 10076 conditions per place. [2023-08-27 14:14:45,500 INFO L140 encePairwiseOnDemand]: 349/352 looper letters, 86 selfloop transitions, 3 changer transitions 0/91 dead transitions. [2023-08-27 14:14:45,501 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 91 transitions, 574 flow [2023-08-27 14:14:45,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-27 14:14:45,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-27 14:14:45,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 513 transitions. [2023-08-27 14:14:45,502 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48579545454545453 [2023-08-27 14:14:45,502 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 513 transitions. [2023-08-27 14:14:45,502 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 513 transitions. [2023-08-27 14:14:45,503 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 14:14:45,503 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 513 transitions. [2023-08-27 14:14:45,504 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 171.0) internal successors, (513), 3 states have internal predecessors, (513), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:14:45,505 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 352.0) internal successors, (1408), 4 states have internal predecessors, (1408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:14:45,506 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 352.0) internal successors, (1408), 4 states have internal predecessors, (1408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:14:45,506 INFO L175 Difference]: Start difference. First operand has 65 places, 60 transitions, 257 flow. Second operand 3 states and 513 transitions. [2023-08-27 14:14:45,506 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 91 transitions, 574 flow [2023-08-27 14:14:45,522 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 91 transitions, 568 flow, removed 2 selfloop flow, removed 1 redundant places. [2023-08-27 14:14:45,523 INFO L231 Difference]: Finished difference. Result has 65 places, 59 transitions, 255 flow [2023-08-27 14:14:45,523 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=352, PETRI_DIFFERENCE_MINUEND_FLOW=249, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=255, PETRI_PLACES=65, PETRI_TRANSITIONS=59} [2023-08-27 14:14:45,523 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 13 predicate places. [2023-08-27 14:14:45,524 INFO L495 AbstractCegarLoop]: Abstraction has has 65 places, 59 transitions, 255 flow [2023-08-27 14:14:45,524 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 157.33333333333334) internal successors, (472), 3 states have internal predecessors, (472), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:14:45,524 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 14:14:45,524 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 14:14:45,524 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-08-27 14:14:45,524 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting thread3Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 24 more)] === [2023-08-27 14:14:45,524 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 14:14:45,525 INFO L85 PathProgramCache]: Analyzing trace with hash 1432633034, now seen corresponding path program 1 times [2023-08-27 14:14:45,525 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 14:14:45,525 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1124412192] [2023-08-27 14:14:45,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 14:14:45,525 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 14:14:45,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 14:14:45,963 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 14:14:45,963 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 14:14:45,963 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1124412192] [2023-08-27 14:14:45,963 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1124412192] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 14:14:45,963 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [32958352] [2023-08-27 14:14:45,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 14:14:45,963 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 14:14:45,964 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 14:14:45,965 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 14:14:45,994 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 14:14:46,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 14:14:46,077 INFO L262 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 30 conjunts are in the unsatisfiable core [2023-08-27 14:14:46,079 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 14:14:46,118 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 14:14:46,161 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-27 14:14:46,162 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 16 treesize of output 18 [2023-08-27 14:14:46,201 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-27 14:14:46,202 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 16 treesize of output 18 [2023-08-27 14:14:46,235 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-27 14:14:46,235 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 16 treesize of output 18 [2023-08-27 14:14:46,290 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-27 14:14:46,290 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 16 treesize of output 18 [2023-08-27 14:14:46,306 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 14:14:46,306 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 14:14:46,411 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_553 (Array Int Int)) (v_ArrVal_555 (Array Int Int)) (v_ArrVal_554 (Array Int Int))) (< 0 (+ 2147483650 (select (select (store (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_553) |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_554) |c_ULTIMATE.start_main_~#t4~0#1.base| v_ArrVal_555) c_~A~0.base) c_~A~0.offset)))) is different from false [2023-08-27 14:14:50,526 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 14:14:50,527 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 33 treesize of output 34 [2023-08-27 14:14:50,539 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 14:14:50,539 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 2195 treesize of output 2163 [2023-08-27 14:14:50,559 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 129 treesize of output 125 [2023-08-27 14:14:50,566 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 256 treesize of output 240 [2023-08-27 14:14:50,576 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 117 treesize of output 115 [2023-08-27 14:14:50,586 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 122 treesize of output 114 [2023-08-27 14:14:50,777 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 14:14:50,777 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [32958352] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 14:14:50,777 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 14:14:50,777 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 21 [2023-08-27 14:14:50,778 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1126989588] [2023-08-27 14:14:50,778 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 14:14:50,778 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-08-27 14:14:50,779 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 14:14:50,779 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-08-27 14:14:50,779 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=365, Unknown=12, NotChecked=40, Total=506 [2023-08-27 14:14:50,781 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 119 out of 352 [2023-08-27 14:14:50,783 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 59 transitions, 255 flow. Second operand has 23 states, 23 states have (on average 120.43478260869566) internal successors, (2770), 23 states have internal predecessors, (2770), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:14:50,783 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 14:14:50,784 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 119 of 352 [2023-08-27 14:14:50,784 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 14:14:51,990 INFO L124 PetriNetUnfolderBase]: 12315/15999 cut-off events. [2023-08-27 14:14:51,990 INFO L125 PetriNetUnfolderBase]: For 18406/18406 co-relation queries the response was YES. [2023-08-27 14:14:52,028 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49024 conditions, 15999 events. 12315/15999 cut-off events. For 18406/18406 co-relation queries the response was YES. Maximal size of possible extension queue 479. Compared 68186 event pairs, 4596 based on Foata normal form. 457/14545 useless extension candidates. Maximal degree in co-relation 49006. Up to 9950 conditions per place. [2023-08-27 14:14:52,082 INFO L140 encePairwiseOnDemand]: 344/352 looper letters, 97 selfloop transitions, 14 changer transitions 0/111 dead transitions. [2023-08-27 14:14:52,082 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 111 transitions, 681 flow [2023-08-27 14:14:52,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-27 14:14:52,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-27 14:14:52,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 905 transitions. [2023-08-27 14:14:52,085 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.367288961038961 [2023-08-27 14:14:52,085 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 905 transitions. [2023-08-27 14:14:52,085 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 905 transitions. [2023-08-27 14:14:52,085 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 14:14:52,085 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 905 transitions. [2023-08-27 14:14:52,087 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 129.28571428571428) internal successors, (905), 7 states have internal predecessors, (905), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:14:52,090 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 352.0) internal successors, (2816), 8 states have internal predecessors, (2816), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:14:52,090 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 352.0) internal successors, (2816), 8 states have internal predecessors, (2816), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:14:52,090 INFO L175 Difference]: Start difference. First operand has 65 places, 59 transitions, 255 flow. Second operand 7 states and 905 transitions. [2023-08-27 14:14:52,090 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 111 transitions, 681 flow [2023-08-27 14:14:52,117 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 111 transitions, 661 flow, removed 1 selfloop flow, removed 2 redundant places. [2023-08-27 14:14:52,119 INFO L231 Difference]: Finished difference. Result has 70 places, 59 transitions, 283 flow [2023-08-27 14:14:52,119 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=352, PETRI_DIFFERENCE_MINUEND_FLOW=247, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=283, PETRI_PLACES=70, PETRI_TRANSITIONS=59} [2023-08-27 14:14:52,119 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 18 predicate places. [2023-08-27 14:14:52,119 INFO L495 AbstractCegarLoop]: Abstraction has has 70 places, 59 transitions, 283 flow [2023-08-27 14:14:52,120 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 120.43478260869566) internal successors, (2770), 23 states have internal predecessors, (2770), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:14:52,121 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 14:14:52,121 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 14:14:52,134 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2023-08-27 14:14:52,325 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 14:14:52,325 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting thread3Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 24 more)] === [2023-08-27 14:14:52,326 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 14:14:52,326 INFO L85 PathProgramCache]: Analyzing trace with hash 1432633437, now seen corresponding path program 1 times [2023-08-27 14:14:52,326 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 14:14:52,326 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1631666646] [2023-08-27 14:14:52,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 14:14:52,326 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 14:14:52,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 14:14:52,438 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 14:14:52,439 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 14:14:52,439 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1631666646] [2023-08-27 14:14:52,439 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1631666646] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 14:14:52,439 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [887110878] [2023-08-27 14:14:52,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 14:14:52,439 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 14:14:52,439 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 14:14:52,440 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 14:14:52,447 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 14:14:52,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 14:14:52,555 INFO L262 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 8 conjunts are in the unsatisfiable core [2023-08-27 14:14:52,557 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 14:14:52,617 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 14:14:52,618 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 14:14:52,668 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 14:14:52,669 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [887110878] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 14:14:52,669 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 14:14:52,669 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 12 [2023-08-27 14:14:52,669 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [108922246] [2023-08-27 14:14:52,669 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 14:14:52,669 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-08-27 14:14:52,669 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 14:14:52,670 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-08-27 14:14:52,670 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2023-08-27 14:14:52,671 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 134 out of 352 [2023-08-27 14:14:52,672 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 59 transitions, 283 flow. Second operand has 14 states, 14 states have (on average 135.57142857142858) internal successors, (1898), 14 states have internal predecessors, (1898), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:14:52,672 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 14:14:52,672 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 134 of 352 [2023-08-27 14:14:52,672 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 14:14:53,703 INFO L124 PetriNetUnfolderBase]: 11420/14968 cut-off events. [2023-08-27 14:14:53,703 INFO L125 PetriNetUnfolderBase]: For 21244/21244 co-relation queries the response was YES. [2023-08-27 14:14:53,730 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46954 conditions, 14968 events. 11420/14968 cut-off events. For 21244/21244 co-relation queries the response was YES. Maximal size of possible extension queue 430. Compared 64614 event pairs, 6031 based on Foata normal form. 472/13499 useless extension candidates. Maximal degree in co-relation 46934. Up to 10785 conditions per place. [2023-08-27 14:14:53,772 INFO L140 encePairwiseOnDemand]: 344/352 looper letters, 120 selfloop transitions, 11 changer transitions 0/131 dead transitions. [2023-08-27 14:14:53,772 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 131 transitions, 804 flow [2023-08-27 14:14:53,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-27 14:14:53,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-27 14:14:53,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1042 transitions. [2023-08-27 14:14:53,775 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42288961038961037 [2023-08-27 14:14:53,775 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1042 transitions. [2023-08-27 14:14:53,775 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1042 transitions. [2023-08-27 14:14:53,776 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 14:14:53,776 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1042 transitions. [2023-08-27 14:14:53,778 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 148.85714285714286) internal successors, (1042), 7 states have internal predecessors, (1042), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:14:53,781 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 352.0) internal successors, (2816), 8 states have internal predecessors, (2816), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:14:53,781 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 352.0) internal successors, (2816), 8 states have internal predecessors, (2816), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:14:53,781 INFO L175 Difference]: Start difference. First operand has 70 places, 59 transitions, 283 flow. Second operand 7 states and 1042 transitions. [2023-08-27 14:14:53,781 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 131 transitions, 804 flow [2023-08-27 14:14:53,807 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 131 transitions, 782 flow, removed 1 selfloop flow, removed 4 redundant places. [2023-08-27 14:14:53,809 INFO L231 Difference]: Finished difference. Result has 75 places, 66 transitions, 380 flow [2023-08-27 14:14:53,809 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=352, PETRI_DIFFERENCE_MINUEND_FLOW=267, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=380, PETRI_PLACES=75, PETRI_TRANSITIONS=66} [2023-08-27 14:14:53,809 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 23 predicate places. [2023-08-27 14:14:53,809 INFO L495 AbstractCegarLoop]: Abstraction has has 75 places, 66 transitions, 380 flow [2023-08-27 14:14:53,810 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 135.57142857142858) internal successors, (1898), 14 states have internal predecessors, (1898), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:14:53,810 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 14:14:53,810 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 14:14:53,820 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-08-27 14:14:54,019 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-08-27 14:14:54,019 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting thread4Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 24 more)] === [2023-08-27 14:14:54,020 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 14:14:54,020 INFO L85 PathProgramCache]: Analyzing trace with hash 1432788061, now seen corresponding path program 1 times [2023-08-27 14:14:54,020 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 14:14:54,020 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [410049033] [2023-08-27 14:14:54,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 14:14:54,021 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 14:14:54,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 14:14:54,057 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 14:14:54,057 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 14:14:54,057 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [410049033] [2023-08-27 14:14:54,058 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [410049033] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-27 14:14:54,058 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-27 14:14:54,058 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-27 14:14:54,059 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2116276149] [2023-08-27 14:14:54,059 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-27 14:14:54,060 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-27 14:14:54,060 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 14:14:54,061 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-27 14:14:54,061 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-27 14:14:54,061 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 159 out of 352 [2023-08-27 14:14:54,062 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 66 transitions, 380 flow. Second operand has 3 states, 3 states have (on average 162.66666666666666) internal successors, (488), 3 states have internal predecessors, (488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:14:54,062 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 14:14:54,062 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 159 of 352 [2023-08-27 14:14:54,062 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 14:14:54,952 INFO L124 PetriNetUnfolderBase]: 10664/13962 cut-off events. [2023-08-27 14:14:54,953 INFO L125 PetriNetUnfolderBase]: For 23204/24323 co-relation queries the response was YES. [2023-08-27 14:14:54,988 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47879 conditions, 13962 events. 10664/13962 cut-off events. For 23204/24323 co-relation queries the response was YES. Maximal size of possible extension queue 497. Compared 66248 event pairs, 1223 based on Foata normal form. 1119/13326 useless extension candidates. Maximal degree in co-relation 47856. Up to 12514 conditions per place. [2023-08-27 14:14:55,036 INFO L140 encePairwiseOnDemand]: 349/352 looper letters, 96 selfloop transitions, 2 changer transitions 0/102 dead transitions. [2023-08-27 14:14:55,037 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 102 transitions, 799 flow [2023-08-27 14:14:55,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-27 14:14:55,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-27 14:14:55,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 527 transitions. [2023-08-27 14:14:55,038 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4990530303030303 [2023-08-27 14:14:55,038 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 527 transitions. [2023-08-27 14:14:55,038 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 527 transitions. [2023-08-27 14:14:55,039 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 14:14:55,039 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 527 transitions. [2023-08-27 14:14:55,040 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 175.66666666666666) internal successors, (527), 3 states have internal predecessors, (527), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:14:55,041 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 352.0) internal successors, (1408), 4 states have internal predecessors, (1408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:14:55,041 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 352.0) internal successors, (1408), 4 states have internal predecessors, (1408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:14:55,041 INFO L175 Difference]: Start difference. First operand has 75 places, 66 transitions, 380 flow. Second operand 3 states and 527 transitions. [2023-08-27 14:14:55,041 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 102 transitions, 799 flow [2023-08-27 14:14:55,135 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 102 transitions, 788 flow, removed 2 selfloop flow, removed 3 redundant places. [2023-08-27 14:14:55,136 INFO L231 Difference]: Finished difference. Result has 75 places, 66 transitions, 379 flow [2023-08-27 14:14:55,136 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=352, PETRI_DIFFERENCE_MINUEND_FLOW=371, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=66, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=379, PETRI_PLACES=75, PETRI_TRANSITIONS=66} [2023-08-27 14:14:55,136 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 23 predicate places. [2023-08-27 14:14:55,137 INFO L495 AbstractCegarLoop]: Abstraction has has 75 places, 66 transitions, 379 flow [2023-08-27 14:14:55,137 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 162.66666666666666) internal successors, (488), 3 states have internal predecessors, (488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:14:55,137 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 14:14:55,137 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 14:14:55,137 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2023-08-27 14:14:55,137 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting thread4Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 24 more)] === [2023-08-27 14:14:55,137 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 14:14:55,137 INFO L85 PathProgramCache]: Analyzing trace with hash 1466756459, now seen corresponding path program 1 times [2023-08-27 14:14:55,138 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 14:14:55,138 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1515063940] [2023-08-27 14:14:55,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 14:14:55,138 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 14:14:55,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 14:14:55,226 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 14:14:55,226 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 14:14:55,226 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1515063940] [2023-08-27 14:14:55,227 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1515063940] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-27 14:14:55,227 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-27 14:14:55,227 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-27 14:14:55,227 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [330278913] [2023-08-27 14:14:55,227 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-27 14:14:55,228 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-27 14:14:55,228 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 14:14:55,228 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-27 14:14:55,229 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-27 14:14:55,229 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 158 out of 352 [2023-08-27 14:14:55,229 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 66 transitions, 379 flow. Second operand has 3 states, 3 states have (on average 162.0) internal successors, (486), 3 states have internal predecessors, (486), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:14:55,229 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 14:14:55,230 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 158 of 352 [2023-08-27 14:14:55,230 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 14:14:56,169 INFO L124 PetriNetUnfolderBase]: 9994/13116 cut-off events. [2023-08-27 14:14:56,170 INFO L125 PetriNetUnfolderBase]: For 21671/22751 co-relation queries the response was YES. [2023-08-27 14:14:56,187 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46560 conditions, 13116 events. 9994/13116 cut-off events. For 21671/22751 co-relation queries the response was YES. Maximal size of possible extension queue 466. Compared 60930 event pairs, 1567 based on Foata normal form. 1248/13393 useless extension candidates. Maximal degree in co-relation 46536. Up to 10749 conditions per place. [2023-08-27 14:14:56,222 INFO L140 encePairwiseOnDemand]: 349/352 looper letters, 89 selfloop transitions, 3 changer transitions 0/96 dead transitions. [2023-08-27 14:14:56,222 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 96 transitions, 750 flow [2023-08-27 14:14:56,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-27 14:14:56,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-27 14:14:56,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 524 transitions. [2023-08-27 14:14:56,225 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4962121212121212 [2023-08-27 14:14:56,225 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 524 transitions. [2023-08-27 14:14:56,225 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 524 transitions. [2023-08-27 14:14:56,226 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 14:14:56,226 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 524 transitions. [2023-08-27 14:14:56,227 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 174.66666666666666) internal successors, (524), 3 states have internal predecessors, (524), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:14:56,228 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 352.0) internal successors, (1408), 4 states have internal predecessors, (1408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:14:56,228 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 352.0) internal successors, (1408), 4 states have internal predecessors, (1408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:14:56,228 INFO L175 Difference]: Start difference. First operand has 75 places, 66 transitions, 379 flow. Second operand 3 states and 524 transitions. [2023-08-27 14:14:56,228 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 96 transitions, 750 flow [2023-08-27 14:14:56,261 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 96 transitions, 744 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-27 14:14:56,262 INFO L231 Difference]: Finished difference. Result has 76 places, 66 transitions, 386 flow [2023-08-27 14:14:56,262 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=352, PETRI_DIFFERENCE_MINUEND_FLOW=375, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=66, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=386, PETRI_PLACES=76, PETRI_TRANSITIONS=66} [2023-08-27 14:14:56,262 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 24 predicate places. [2023-08-27 14:14:56,262 INFO L495 AbstractCegarLoop]: Abstraction has has 76 places, 66 transitions, 386 flow [2023-08-27 14:14:56,263 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 162.0) internal successors, (486), 3 states have internal predecessors, (486), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:14:56,263 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 14:14:56,263 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 14:14:56,263 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2023-08-27 14:14:56,263 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting thread3Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 24 more)] === [2023-08-27 14:14:56,263 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 14:14:56,263 INFO L85 PathProgramCache]: Analyzing trace with hash 103529810, now seen corresponding path program 1 times [2023-08-27 14:14:56,263 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 14:14:56,264 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [731535962] [2023-08-27 14:14:56,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 14:14:56,264 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 14:14:56,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 14:14:56,309 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 14:14:56,309 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 14:14:56,309 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [731535962] [2023-08-27 14:14:56,309 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [731535962] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 14:14:56,309 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1585535374] [2023-08-27 14:14:56,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 14:14:56,309 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 14:14:56,309 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 14:14:56,313 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 14:14:56,342 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 14:14:56,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 14:14:56,439 INFO L262 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-27 14:14:56,441 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 14:14:56,448 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 14:14:56,448 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-27 14:14:56,448 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1585535374] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-27 14:14:56,448 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-27 14:14:56,448 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 4 [2023-08-27 14:14:56,449 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [379634258] [2023-08-27 14:14:56,449 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-27 14:14:56,449 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-27 14:14:56,449 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 14:14:56,449 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-27 14:14:56,449 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-08-27 14:14:56,451 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 154 out of 352 [2023-08-27 14:14:56,451 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 66 transitions, 386 flow. Second operand has 4 states, 4 states have (on average 156.75) internal successors, (627), 4 states have internal predecessors, (627), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:14:56,451 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 14:14:56,451 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 154 of 352 [2023-08-27 14:14:56,452 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 14:14:57,117 INFO L124 PetriNetUnfolderBase]: 8475/11072 cut-off events. [2023-08-27 14:14:57,118 INFO L125 PetriNetUnfolderBase]: For 21711/21711 co-relation queries the response was YES. [2023-08-27 14:14:57,148 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39789 conditions, 11072 events. 8475/11072 cut-off events. For 21711/21711 co-relation queries the response was YES. Maximal size of possible extension queue 308. Compared 45413 event pairs, 2045 based on Foata normal form. 318/10560 useless extension candidates. Maximal degree in co-relation 39764. Up to 4945 conditions per place. [2023-08-27 14:14:57,185 INFO L140 encePairwiseOnDemand]: 348/352 looper letters, 102 selfloop transitions, 14 changer transitions 0/116 dead transitions. [2023-08-27 14:14:57,185 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 116 transitions, 812 flow [2023-08-27 14:14:57,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-27 14:14:57,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-27 14:14:57,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 686 transitions. [2023-08-27 14:14:57,186 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4872159090909091 [2023-08-27 14:14:57,187 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 686 transitions. [2023-08-27 14:14:57,187 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 686 transitions. [2023-08-27 14:14:57,187 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 14:14:57,187 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 686 transitions. [2023-08-27 14:14:57,188 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 171.5) internal successors, (686), 4 states have internal predecessors, (686), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:14:57,190 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 352.0) internal successors, (1760), 5 states have internal predecessors, (1760), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:14:57,190 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 352.0) internal successors, (1760), 5 states have internal predecessors, (1760), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:14:57,190 INFO L175 Difference]: Start difference. First operand has 76 places, 66 transitions, 386 flow. Second operand 4 states and 686 transitions. [2023-08-27 14:14:57,190 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 116 transitions, 812 flow [2023-08-27 14:14:57,240 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 116 transitions, 778 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-08-27 14:14:57,241 INFO L231 Difference]: Finished difference. Result has 71 places, 63 transitions, 364 flow [2023-08-27 14:14:57,241 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=352, PETRI_DIFFERENCE_MINUEND_FLOW=336, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=63, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=364, PETRI_PLACES=71, PETRI_TRANSITIONS=63} [2023-08-27 14:14:57,241 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 19 predicate places. [2023-08-27 14:14:57,241 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 63 transitions, 364 flow [2023-08-27 14:14:57,241 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 156.75) internal successors, (627), 4 states have internal predecessors, (627), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:14:57,242 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 14:14:57,242 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 14:14:57,246 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-08-27 14:14:57,446 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-08-27 14:14:57,446 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting thread3Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 24 more)] === [2023-08-27 14:14:57,447 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 14:14:57,447 INFO L85 PathProgramCache]: Analyzing trace with hash 103529750, now seen corresponding path program 2 times [2023-08-27 14:14:57,447 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 14:14:57,447 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [248951662] [2023-08-27 14:14:57,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 14:14:57,447 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 14:14:57,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 14:14:57,845 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 14:14:57,845 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 14:14:57,845 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [248951662] [2023-08-27 14:14:57,845 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [248951662] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 14:14:57,846 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1105322525] [2023-08-27 14:14:57,846 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-27 14:14:57,846 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 14:14:57,846 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 14:14:57,849 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 14:14:57,879 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 14:14:57,988 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-27 14:14:57,988 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 14:14:58,004 INFO L262 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 32 conjunts are in the unsatisfiable core [2023-08-27 14:14:58,006 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 14:14:58,063 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2023-08-27 14:14:58,101 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-27 14:14:58,102 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 18 treesize of output 20 [2023-08-27 14:14:58,130 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-27 14:14:58,131 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 18 treesize of output 20 [2023-08-27 14:14:58,158 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-27 14:14:58,158 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 18 treesize of output 20 [2023-08-27 14:14:58,205 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 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 23 treesize of output 22 [2023-08-27 14:14:58,223 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 14:14:58,223 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 14:15:00,351 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_810 (Array Int Int)) (v_ArrVal_812 (Array Int Int)) (v_ArrVal_811 (Array Int Int))) (< 0 (+ (select (select (store (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_810) |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_811) |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_812) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|) (+ 4 |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset|)) 2147483650))) is different from false [2023-08-27 14:15:00,361 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 14:15:00,361 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 32 treesize of output 33 [2023-08-27 14:15:00,370 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 14:15:00,370 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 311 treesize of output 299 [2023-08-27 14:15:00,379 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 67 treesize of output 63 [2023-08-27 14:15:00,384 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 134 treesize of output 118 [2023-08-27 14:15:00,391 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 62 treesize of output 54 [2023-08-27 14:15:00,517 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 2 not checked. [2023-08-27 14:15:00,518 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1105322525] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 14:15:00,518 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 14:15:00,518 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 24 [2023-08-27 14:15:00,520 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1540895886] [2023-08-27 14:15:00,520 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 14:15:00,521 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-08-27 14:15:00,522 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 14:15:00,523 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-08-27 14:15:00,523 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=507, Unknown=11, NotChecked=46, Total=650 [2023-08-27 14:15:00,525 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 122 out of 352 [2023-08-27 14:15:00,527 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 63 transitions, 364 flow. Second operand has 26 states, 26 states have (on average 123.38461538461539) internal successors, (3208), 26 states have internal predecessors, (3208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:15:00,527 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 14:15:00,527 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 122 of 352 [2023-08-27 14:15:00,527 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 14:15:01,912 INFO L124 PetriNetUnfolderBase]: 8627/11259 cut-off events. [2023-08-27 14:15:01,912 INFO L125 PetriNetUnfolderBase]: For 27491/27491 co-relation queries the response was YES. [2023-08-27 14:15:01,937 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40950 conditions, 11259 events. 8627/11259 cut-off events. For 27491/27491 co-relation queries the response was YES. Maximal size of possible extension queue 316. Compared 45241 event pairs, 4973 based on Foata normal form. 35/10775 useless extension candidates. Maximal degree in co-relation 40927. Up to 10214 conditions per place. [2023-08-27 14:15:01,972 INFO L140 encePairwiseOnDemand]: 344/352 looper letters, 103 selfloop transitions, 15 changer transitions 0/118 dead transitions. [2023-08-27 14:15:01,972 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 118 transitions, 839 flow [2023-08-27 14:15:01,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-08-27 14:15:01,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-08-27 14:15:01,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1053 transitions. [2023-08-27 14:15:01,974 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3739346590909091 [2023-08-27 14:15:01,974 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1053 transitions. [2023-08-27 14:15:01,974 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1053 transitions. [2023-08-27 14:15:01,975 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 14:15:01,975 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1053 transitions. [2023-08-27 14:15:01,976 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 131.625) internal successors, (1053), 8 states have internal predecessors, (1053), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:15:01,979 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 352.0) internal successors, (3168), 9 states have internal predecessors, (3168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:15:01,979 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 352.0) internal successors, (3168), 9 states have internal predecessors, (3168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:15:01,979 INFO L175 Difference]: Start difference. First operand has 71 places, 63 transitions, 364 flow. Second operand 8 states and 1053 transitions. [2023-08-27 14:15:01,979 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 118 transitions, 839 flow [2023-08-27 14:15:02,026 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 118 transitions, 815 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-27 14:15:02,028 INFO L231 Difference]: Finished difference. Result has 78 places, 68 transitions, 415 flow [2023-08-27 14:15:02,028 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=352, PETRI_DIFFERENCE_MINUEND_FLOW=342, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=63, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=415, PETRI_PLACES=78, PETRI_TRANSITIONS=68} [2023-08-27 14:15:02,028 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 26 predicate places. [2023-08-27 14:15:02,028 INFO L495 AbstractCegarLoop]: Abstraction has has 78 places, 68 transitions, 415 flow [2023-08-27 14:15:02,029 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 123.38461538461539) internal successors, (3208), 26 states have internal predecessors, (3208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:15:02,029 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 14:15:02,029 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 14:15:02,033 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-08-27 14:15:02,229 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 14:15:02,229 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting thread3Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 24 more)] === [2023-08-27 14:15:02,230 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 14:15:02,230 INFO L85 PathProgramCache]: Analyzing trace with hash -1080768135, now seen corresponding path program 1 times [2023-08-27 14:15:02,230 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 14:15:02,230 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1732750597] [2023-08-27 14:15:02,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 14:15:02,230 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 14:15:02,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 14:15:02,754 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 14:15:02,754 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 14:15:02,755 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1732750597] [2023-08-27 14:15:02,755 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1732750597] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 14:15:02,755 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1486525788] [2023-08-27 14:15:02,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 14:15:02,755 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 14:15:02,755 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 14:15:02,756 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 14:15:02,782 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 14:15:02,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 14:15:02,890 INFO L262 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 36 conjunts are in the unsatisfiable core [2023-08-27 14:15:02,892 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 14:15:02,973 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 14:15:03,020 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-27 14:15:03,021 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 16 treesize of output 18 [2023-08-27 14:15:03,077 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-27 14:15:03,078 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 16 treesize of output 18 [2023-08-27 14:15:03,122 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-27 14:15:03,122 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 16 treesize of output 18 [2023-08-27 14:15:03,158 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-27 14:15:03,159 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 16 treesize of output 18 [2023-08-27 14:15:03,175 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 20 [2023-08-27 14:15:03,195 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 14:15:03,195 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 14:15:03,290 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_887 (Array Int Int)) (v_ArrVal_888 (Array Int Int))) (< 0 (+ (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_887) |c_ULTIMATE.start_main_~#t4~0#1.base| v_ArrVal_888) c_~A~0.base) (+ c_~A~0.offset 4)) 2147483650))) is different from false [2023-08-27 14:15:07,414 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_887 (Array Int Int)) (v_ArrVal_886 (Array Int Int)) (v_ArrVal_888 (Array Int Int)) (v_ArrVal_885 (Array Int Int))) (< 0 (+ (select (select (store (store (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_885) |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_886) |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_887) |c_ULTIMATE.start_main_~#t4~0#1.base| v_ArrVal_888) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|) (+ 4 |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset|)) 2147483650))) is different from false [2023-08-27 14:15:07,423 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 14:15:07,424 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 35 treesize of output 36 [2023-08-27 14:15:07,457 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 14:15:07,458 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 39171 treesize of output 38403 [2023-08-27 14:15:07,497 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 143 treesize of output 139 [2023-08-27 14:15:07,509 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 139 treesize of output 131 [2023-08-27 14:15:07,518 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 278 treesize of output 246 [2023-08-27 14:15:07,535 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 130 treesize of output 114 [2023-08-27 14:15:07,699 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 2 not checked. [2023-08-27 14:15:07,699 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1486525788] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 14:15:07,699 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 14:15:07,699 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 25 [2023-08-27 14:15:07,700 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1368656451] [2023-08-27 14:15:07,700 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 14:15:07,700 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-08-27 14:15:07,700 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 14:15:07,701 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-08-27 14:15:07,701 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=499, Unknown=10, NotChecked=94, Total=702 [2023-08-27 14:15:07,703 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 119 out of 352 [2023-08-27 14:15:07,705 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 68 transitions, 415 flow. Second operand has 27 states, 27 states have (on average 120.4074074074074) internal successors, (3251), 27 states have internal predecessors, (3251), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:15:07,705 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 14:15:07,705 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 119 of 352 [2023-08-27 14:15:07,705 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 14:15:09,116 INFO L124 PetriNetUnfolderBase]: 9833/12748 cut-off events. [2023-08-27 14:15:09,116 INFO L125 PetriNetUnfolderBase]: For 28430/28430 co-relation queries the response was YES. [2023-08-27 14:15:09,152 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46510 conditions, 12748 events. 9833/12748 cut-off events. For 28430/28430 co-relation queries the response was YES. Maximal size of possible extension queue 349. Compared 52076 event pairs, 4085 based on Foata normal form. 283/12455 useless extension candidates. Maximal degree in co-relation 46484. Up to 6360 conditions per place. [2023-08-27 14:15:09,193 INFO L140 encePairwiseOnDemand]: 345/352 looper letters, 121 selfloop transitions, 17 changer transitions 0/138 dead transitions. [2023-08-27 14:15:09,193 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 138 transitions, 943 flow [2023-08-27 14:15:09,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-08-27 14:15:09,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-08-27 14:15:09,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1056 transitions. [2023-08-27 14:15:09,196 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.375 [2023-08-27 14:15:09,196 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1056 transitions. [2023-08-27 14:15:09,196 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1056 transitions. [2023-08-27 14:15:09,196 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 14:15:09,196 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1056 transitions. [2023-08-27 14:15:09,198 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 132.0) internal successors, (1056), 8 states have internal predecessors, (1056), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:15:09,200 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 352.0) internal successors, (3168), 9 states have internal predecessors, (3168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:15:09,200 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 352.0) internal successors, (3168), 9 states have internal predecessors, (3168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:15:09,200 INFO L175 Difference]: Start difference. First operand has 78 places, 68 transitions, 415 flow. Second operand 8 states and 1056 transitions. [2023-08-27 14:15:09,200 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 138 transitions, 943 flow [2023-08-27 14:15:09,267 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 82 places, 138 transitions, 917 flow, removed 8 selfloop flow, removed 3 redundant places. [2023-08-27 14:15:09,269 INFO L231 Difference]: Finished difference. Result has 83 places, 70 transitions, 452 flow [2023-08-27 14:15:09,269 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=352, PETRI_DIFFERENCE_MINUEND_FLOW=389, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=68, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=452, PETRI_PLACES=83, PETRI_TRANSITIONS=70} [2023-08-27 14:15:09,269 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 31 predicate places. [2023-08-27 14:15:09,269 INFO L495 AbstractCegarLoop]: Abstraction has has 83 places, 70 transitions, 452 flow [2023-08-27 14:15:09,270 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 120.4074074074074) internal successors, (3251), 27 states have internal predecessors, (3251), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:15:09,270 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 14:15:09,270 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 14:15:09,274 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 14:15:09,470 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 14:15:09,471 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting thread3Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 24 more)] === [2023-08-27 14:15:09,471 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 14:15:09,471 INFO L85 PathProgramCache]: Analyzing trace with hash -1085541422, now seen corresponding path program 3 times [2023-08-27 14:15:09,471 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 14:15:09,471 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1505638060] [2023-08-27 14:15:09,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 14:15:09,471 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 14:15:09,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 14:15:09,592 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 14:15:09,592 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 14:15:09,592 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1505638060] [2023-08-27 14:15:09,592 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1505638060] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 14:15:09,592 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [338343828] [2023-08-27 14:15:09,592 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-27 14:15:09,593 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 14:15:09,593 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 14:15:09,597 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 14:15:09,621 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 14:15:09,740 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-08-27 14:15:09,740 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 14:15:09,741 INFO L262 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 10 conjunts are in the unsatisfiable core [2023-08-27 14:15:09,743 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 14:15:09,845 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 14:15:09,845 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 14:15:09,924 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 14:15:09,924 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [338343828] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 14:15:09,924 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 14:15:09,925 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 17 [2023-08-27 14:15:09,925 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [93108070] [2023-08-27 14:15:09,925 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 14:15:09,925 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-08-27 14:15:09,925 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 14:15:09,926 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-08-27 14:15:09,926 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=247, Unknown=0, NotChecked=0, Total=342 [2023-08-27 14:15:09,927 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 134 out of 352 [2023-08-27 14:15:09,929 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 83 places, 70 transitions, 452 flow. Second operand has 19 states, 19 states have (on average 135.42105263157896) internal successors, (2573), 19 states have internal predecessors, (2573), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:15:09,929 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 14:15:09,929 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 134 of 352 [2023-08-27 14:15:09,929 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 14:15:11,548 INFO L124 PetriNetUnfolderBase]: 15539/20145 cut-off events. [2023-08-27 14:15:11,548 INFO L125 PetriNetUnfolderBase]: For 54238/54238 co-relation queries the response was YES. [2023-08-27 14:15:11,586 INFO L83 FinitePrefix]: Finished finitePrefix Result has 78576 conditions, 20145 events. 15539/20145 cut-off events. For 54238/54238 co-relation queries the response was YES. Maximal size of possible extension queue 505. Compared 87429 event pairs, 5996 based on Foata normal form. 636/19871 useless extension candidates. Maximal degree in co-relation 78548. Up to 9079 conditions per place. [2023-08-27 14:15:11,639 INFO L140 encePairwiseOnDemand]: 345/352 looper letters, 167 selfloop transitions, 24 changer transitions 0/191 dead transitions. [2023-08-27 14:15:11,639 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 191 transitions, 1386 flow [2023-08-27 14:15:11,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-08-27 14:15:11,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-08-27 14:15:11,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1329 transitions. [2023-08-27 14:15:11,642 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41950757575757575 [2023-08-27 14:15:11,642 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1329 transitions. [2023-08-27 14:15:11,642 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1329 transitions. [2023-08-27 14:15:11,643 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 14:15:11,643 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1329 transitions. [2023-08-27 14:15:11,644 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 147.66666666666666) internal successors, (1329), 9 states have internal predecessors, (1329), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:15:11,647 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 352.0) internal successors, (3520), 10 states have internal predecessors, (3520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:15:11,647 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 352.0) internal successors, (3520), 10 states have internal predecessors, (3520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:15:11,647 INFO L175 Difference]: Start difference. First operand has 83 places, 70 transitions, 452 flow. Second operand 9 states and 1329 transitions. [2023-08-27 14:15:11,647 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 191 transitions, 1386 flow [2023-08-27 14:15:11,957 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 191 transitions, 1305 flow, removed 20 selfloop flow, removed 7 redundant places. [2023-08-27 14:15:11,958 INFO L231 Difference]: Finished difference. Result has 88 places, 81 transitions, 608 flow [2023-08-27 14:15:11,959 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=352, PETRI_DIFFERENCE_MINUEND_FLOW=395, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=70, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=608, PETRI_PLACES=88, PETRI_TRANSITIONS=81} [2023-08-27 14:15:11,959 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 36 predicate places. [2023-08-27 14:15:11,959 INFO L495 AbstractCegarLoop]: Abstraction has has 88 places, 81 transitions, 608 flow [2023-08-27 14:15:11,959 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 135.42105263157896) internal successors, (2573), 19 states have internal predecessors, (2573), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:15:11,960 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 14:15:11,960 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 14:15:11,965 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 14:15:12,165 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2023-08-27 14:15:12,165 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting thread4Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 24 more)] === [2023-08-27 14:15:12,165 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 14:15:12,165 INFO L85 PathProgramCache]: Analyzing trace with hash 1044611722, now seen corresponding path program 1 times [2023-08-27 14:15:12,166 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 14:15:12,166 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1744607942] [2023-08-27 14:15:12,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 14:15:12,166 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 14:15:12,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 14:15:12,240 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 14:15:12,240 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 14:15:12,241 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1744607942] [2023-08-27 14:15:12,241 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1744607942] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-27 14:15:12,241 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-27 14:15:12,241 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-27 14:15:12,241 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1787614785] [2023-08-27 14:15:12,241 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-27 14:15:12,241 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-27 14:15:12,241 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 14:15:12,242 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-27 14:15:12,242 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-27 14:15:12,242 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 158 out of 352 [2023-08-27 14:15:12,243 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 81 transitions, 608 flow. Second operand has 3 states, 3 states have (on average 162.66666666666666) internal successors, (488), 3 states have internal predecessors, (488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:15:12,243 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 14:15:12,243 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 158 of 352 [2023-08-27 14:15:12,243 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 14:15:13,546 INFO L124 PetriNetUnfolderBase]: 14312/18523 cut-off events. [2023-08-27 14:15:13,546 INFO L125 PetriNetUnfolderBase]: For 67537/69233 co-relation queries the response was YES. [2023-08-27 14:15:13,639 INFO L83 FinitePrefix]: Finished finitePrefix Result has 74667 conditions, 18523 events. 14312/18523 cut-off events. For 67537/69233 co-relation queries the response was YES. Maximal size of possible extension queue 630. Compared 86965 event pairs, 2730 based on Foata normal form. 1854/19418 useless extension candidates. Maximal degree in co-relation 74637. Up to 13798 conditions per place. [2023-08-27 14:15:13,712 INFO L140 encePairwiseOnDemand]: 349/352 looper letters, 122 selfloop transitions, 2 changer transitions 0/130 dead transitions. [2023-08-27 14:15:13,712 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 90 places, 130 transitions, 1260 flow [2023-08-27 14:15:13,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-27 14:15:13,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-27 14:15:13,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 522 transitions. [2023-08-27 14:15:13,714 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4943181818181818 [2023-08-27 14:15:13,714 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 522 transitions. [2023-08-27 14:15:13,714 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 522 transitions. [2023-08-27 14:15:13,714 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 14:15:13,714 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 522 transitions. [2023-08-27 14:15:13,715 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 174.0) internal successors, (522), 3 states have internal predecessors, (522), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:15:13,715 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 352.0) internal successors, (1408), 4 states have internal predecessors, (1408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:15:13,716 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 352.0) internal successors, (1408), 4 states have internal predecessors, (1408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:15:13,716 INFO L175 Difference]: Start difference. First operand has 88 places, 81 transitions, 608 flow. Second operand 3 states and 522 transitions. [2023-08-27 14:15:13,716 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 90 places, 130 transitions, 1260 flow [2023-08-27 14:15:13,845 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 130 transitions, 1238 flow, removed 6 selfloop flow, removed 4 redundant places. [2023-08-27 14:15:13,846 INFO L231 Difference]: Finished difference. Result has 87 places, 81 transitions, 600 flow [2023-08-27 14:15:13,846 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=352, PETRI_DIFFERENCE_MINUEND_FLOW=592, PETRI_DIFFERENCE_MINUEND_PLACES=84, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=81, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=79, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=600, PETRI_PLACES=87, PETRI_TRANSITIONS=81} [2023-08-27 14:15:13,846 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 35 predicate places. [2023-08-27 14:15:13,847 INFO L495 AbstractCegarLoop]: Abstraction has has 87 places, 81 transitions, 600 flow [2023-08-27 14:15:13,847 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 162.66666666666666) internal successors, (488), 3 states have internal predecessors, (488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:15:13,847 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 14:15:13,847 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 14:15:13,847 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2023-08-27 14:15:13,847 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting thread3Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 24 more)] === [2023-08-27 14:15:13,847 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 14:15:13,847 INFO L85 PathProgramCache]: Analyzing trace with hash 1546069579, now seen corresponding path program 4 times [2023-08-27 14:15:13,847 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 14:15:13,847 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1705568650] [2023-08-27 14:15:13,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 14:15:13,848 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 14:15:13,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 14:15:14,354 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 14:15:14,354 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 14:15:14,354 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1705568650] [2023-08-27 14:15:14,354 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1705568650] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 14:15:14,354 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [909154603] [2023-08-27 14:15:14,354 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-27 14:15:14,354 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 14:15:14,355 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 14:15:14,355 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 14:15:14,375 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 14:15:14,495 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-27 14:15:14,495 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 14:15:14,497 INFO L262 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 38 conjunts are in the unsatisfiable core [2023-08-27 14:15:14,505 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 14:15:14,605 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2023-08-27 14:15:14,641 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-27 14:15:14,642 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 18 treesize of output 20 [2023-08-27 14:15:14,679 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-27 14:15:14,680 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 18 treesize of output 20 [2023-08-27 14:15:14,714 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-27 14:15:14,715 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 18 treesize of output 20 [2023-08-27 14:15:14,770 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 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 23 treesize of output 22 [2023-08-27 14:15:14,802 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 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 25 treesize of output 24 [2023-08-27 14:15:14,829 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 14:15:14,829 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 14:15:15,024 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1065 (Array Int Int)) (v_ArrVal_1064 (Array Int Int)) (v_ArrVal_1063 (Array Int Int))) (< 0 (+ 2147483650 (select (select (store (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_1063) |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1064) |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_1065) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|) (+ 8 |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset|))))) is different from false [2023-08-27 14:15:15,034 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 14:15:15,034 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 32 treesize of output 33 [2023-08-27 14:15:15,045 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 14:15:15,045 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 1235 treesize of output 1187 [2023-08-27 14:15:15,056 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 67 treesize of output 63 [2023-08-27 14:15:15,062 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 63 treesize of output 55 [2023-08-27 14:15:15,093 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 66 treesize of output 50 [2023-08-27 14:15:15,208 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 3 not checked. [2023-08-27 14:15:15,208 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [909154603] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 14:15:15,208 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 14:15:15,208 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 30 [2023-08-27 14:15:15,208 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [394389878] [2023-08-27 14:15:15,209 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 14:15:15,209 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2023-08-27 14:15:15,209 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 14:15:15,210 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2023-08-27 14:15:15,210 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=816, Unknown=14, NotChecked=58, Total=992 [2023-08-27 14:15:15,212 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 122 out of 352 [2023-08-27 14:15:15,215 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 81 transitions, 600 flow. Second operand has 32 states, 32 states have (on average 123.3125) internal successors, (3946), 32 states have internal predecessors, (3946), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:15:15,215 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 14:15:15,215 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 122 of 352 [2023-08-27 14:15:15,215 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 14:15:17,909 INFO L124 PetriNetUnfolderBase]: 15002/19457 cut-off events. [2023-08-27 14:15:17,909 INFO L125 PetriNetUnfolderBase]: For 55901/55901 co-relation queries the response was YES. [2023-08-27 14:15:18,011 INFO L83 FinitePrefix]: Finished finitePrefix Result has 77710 conditions, 19457 events. 15002/19457 cut-off events. For 55901/55901 co-relation queries the response was YES. Maximal size of possible extension queue 482. Compared 83634 event pairs, 8586 based on Foata normal form. 35/18575 useless extension candidates. Maximal degree in co-relation 77679. Up to 18261 conditions per place. [2023-08-27 14:15:18,076 INFO L140 encePairwiseOnDemand]: 344/352 looper letters, 132 selfloop transitions, 19 changer transitions 0/151 dead transitions. [2023-08-27 14:15:18,076 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 96 places, 151 transitions, 1245 flow [2023-08-27 14:15:18,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-08-27 14:15:18,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-08-27 14:15:18,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 1310 transitions. [2023-08-27 14:15:18,078 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3721590909090909 [2023-08-27 14:15:18,078 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 1310 transitions. [2023-08-27 14:15:18,078 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 1310 transitions. [2023-08-27 14:15:18,078 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 14:15:18,078 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 1310 transitions. [2023-08-27 14:15:18,080 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 131.0) internal successors, (1310), 10 states have internal predecessors, (1310), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:15:18,082 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 352.0) internal successors, (3872), 11 states have internal predecessors, (3872), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:15:18,082 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 352.0) internal successors, (3872), 11 states have internal predecessors, (3872), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:15:18,082 INFO L175 Difference]: Start difference. First operand has 87 places, 81 transitions, 600 flow. Second operand 10 states and 1310 transitions. [2023-08-27 14:15:18,082 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 96 places, 151 transitions, 1245 flow [2023-08-27 14:15:18,433 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 93 places, 151 transitions, 1225 flow, removed 1 selfloop flow, removed 3 redundant places. [2023-08-27 14:15:18,436 INFO L231 Difference]: Finished difference. Result has 96 places, 87 transitions, 701 flow [2023-08-27 14:15:18,436 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=352, PETRI_DIFFERENCE_MINUEND_FLOW=592, PETRI_DIFFERENCE_MINUEND_PLACES=84, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=81, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=701, PETRI_PLACES=96, PETRI_TRANSITIONS=87} [2023-08-27 14:15:18,436 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 44 predicate places. [2023-08-27 14:15:18,436 INFO L495 AbstractCegarLoop]: Abstraction has has 96 places, 87 transitions, 701 flow [2023-08-27 14:15:18,437 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 123.3125) internal successors, (3946), 32 states have internal predecessors, (3946), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:15:18,437 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 14:15:18,437 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 14:15:18,445 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 14:15:18,645 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2023-08-27 14:15:18,645 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting thread4Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 24 more)] === [2023-08-27 14:15:18,646 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 14:15:18,646 INFO L85 PathProgramCache]: Analyzing trace with hash -1980450043, now seen corresponding path program 1 times [2023-08-27 14:15:18,646 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 14:15:18,646 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [627028630] [2023-08-27 14:15:18,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 14:15:18,646 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 14:15:18,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 14:15:18,909 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 14:15:18,909 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 14:15:18,909 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [627028630] [2023-08-27 14:15:18,909 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [627028630] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 14:15:18,909 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1100946149] [2023-08-27 14:15:18,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 14:15:18,910 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 14:15:18,910 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 14:15:18,913 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 14:15:18,937 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 14:15:19,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 14:15:19,056 INFO L262 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 25 conjunts are in the unsatisfiable core [2023-08-27 14:15:19,058 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 14:15:19,092 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 14:15:19,132 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-27 14:15:19,133 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 16 treesize of output 18 [2023-08-27 14:15:19,176 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-27 14:15:19,176 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 16 treesize of output 18 [2023-08-27 14:15:19,210 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-27 14:15:19,210 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 16 treesize of output 18 [2023-08-27 14:15:19,228 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2023-08-27 14:15:19,244 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 14:15:19,244 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 14:15:19,266 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1134 (Array Int Int))) (< 0 (+ 2147483650 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_1134) c_~A~0.base) c_~A~0.offset)))) is different from false [2023-08-27 14:15:23,436 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 14:15:23,437 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 30 treesize of output 31 [2023-08-27 14:15:23,446 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 14:15:23,446 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 279 treesize of output 271 [2023-08-27 14:15:23,455 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 124 treesize of output 120 [2023-08-27 14:15:23,460 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 120 treesize of output 112 [2023-08-27 14:15:23,467 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 56 treesize of output 54 [2023-08-27 14:15:23,562 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 14:15:23,563 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1100946149] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 14:15:23,563 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 14:15:23,563 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 17 [2023-08-27 14:15:23,563 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1185860075] [2023-08-27 14:15:23,563 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 14:15:23,563 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-08-27 14:15:23,564 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 14:15:23,564 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-08-27 14:15:23,564 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=243, Unknown=5, NotChecked=32, Total=342 [2023-08-27 14:15:23,566 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 127 out of 352 [2023-08-27 14:15:23,567 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 96 places, 87 transitions, 701 flow. Second operand has 19 states, 19 states have (on average 129.10526315789474) internal successors, (2453), 19 states have internal predecessors, (2453), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:15:23,567 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 14:15:23,568 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 127 of 352 [2023-08-27 14:15:23,568 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 14:15:25,639 INFO L124 PetriNetUnfolderBase]: 21025/27491 cut-off events. [2023-08-27 14:15:25,640 INFO L125 PetriNetUnfolderBase]: For 88669/90431 co-relation queries the response was YES. [2023-08-27 14:15:25,769 INFO L83 FinitePrefix]: Finished finitePrefix Result has 107894 conditions, 27491 events. 21025/27491 cut-off events. For 88669/90431 co-relation queries the response was YES. Maximal size of possible extension queue 888. Compared 134588 event pairs, 3037 based on Foata normal form. 2336/28313 useless extension candidates. Maximal degree in co-relation 107861. Up to 13069 conditions per place. [2023-08-27 14:15:25,860 INFO L140 encePairwiseOnDemand]: 346/352 looper letters, 131 selfloop transitions, 16 changer transitions 0/153 dead transitions. [2023-08-27 14:15:25,860 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 101 places, 153 transitions, 1394 flow [2023-08-27 14:15:25,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-27 14:15:25,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-27 14:15:25,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 828 transitions. [2023-08-27 14:15:25,861 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39204545454545453 [2023-08-27 14:15:25,861 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 828 transitions. [2023-08-27 14:15:25,861 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 828 transitions. [2023-08-27 14:15:25,861 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 14:15:25,861 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 828 transitions. [2023-08-27 14:15:25,862 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 138.0) internal successors, (828), 6 states have internal predecessors, (828), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:15:25,864 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 352.0) internal successors, (2464), 7 states have internal predecessors, (2464), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:15:25,864 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 352.0) internal successors, (2464), 7 states have internal predecessors, (2464), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:15:25,864 INFO L175 Difference]: Start difference. First operand has 96 places, 87 transitions, 701 flow. Second operand 6 states and 828 transitions. [2023-08-27 14:15:25,864 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 101 places, 153 transitions, 1394 flow [2023-08-27 14:15:26,262 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 97 places, 153 transitions, 1354 flow, removed 14 selfloop flow, removed 4 redundant places. [2023-08-27 14:15:26,263 INFO L231 Difference]: Finished difference. Result has 98 places, 88 transitions, 709 flow [2023-08-27 14:15:26,263 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=352, PETRI_DIFFERENCE_MINUEND_FLOW=661, PETRI_DIFFERENCE_MINUEND_PLACES=92, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=87, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=709, PETRI_PLACES=98, PETRI_TRANSITIONS=88} [2023-08-27 14:15:26,264 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 46 predicate places. [2023-08-27 14:15:26,264 INFO L495 AbstractCegarLoop]: Abstraction has has 98 places, 88 transitions, 709 flow [2023-08-27 14:15:26,264 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 129.10526315789474) internal successors, (2453), 19 states have internal predecessors, (2453), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:15:26,264 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 14:15:26,264 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 14:15:26,269 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 14:15:26,465 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 14:15:26,465 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting thread3Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 24 more)] === [2023-08-27 14:15:26,465 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 14:15:26,465 INFO L85 PathProgramCache]: Analyzing trace with hash 683133034, now seen corresponding path program 2 times [2023-08-27 14:15:26,466 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 14:15:26,466 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [338877494] [2023-08-27 14:15:26,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 14:15:26,466 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 14:15:26,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 14:15:27,029 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 14:15:27,030 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 14:15:27,030 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [338877494] [2023-08-27 14:15:27,030 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [338877494] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 14:15:27,030 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2122411478] [2023-08-27 14:15:27,030 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-27 14:15:27,030 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 14:15:27,030 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 14:15:27,037 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 14:15:27,040 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 14:15:27,192 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-27 14:15:27,193 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 14:15:27,194 INFO L262 TraceCheckSpWp]: Trace formula consists of 250 conjuncts, 42 conjunts are in the unsatisfiable core [2023-08-27 14:15:27,197 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 14:15:27,311 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 14:15:27,363 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-27 14:15:27,363 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 16 treesize of output 18 [2023-08-27 14:15:27,407 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-27 14:15:27,408 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 16 treesize of output 18 [2023-08-27 14:15:27,448 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-27 14:15:27,449 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 16 treesize of output 18 [2023-08-27 14:15:27,510 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-27 14:15:27,511 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 16 treesize of output 18 [2023-08-27 14:15:27,521 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 20 [2023-08-27 14:15:27,545 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 20 [2023-08-27 14:15:27,573 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 14:15:27,573 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 14:15:27,665 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1216 (Array Int Int))) (< 0 (+ (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t4~0#1.base| v_ArrVal_1216) c_~A~0.base) (+ c_~A~0.offset 8)) 2147483650))) is different from false [2023-08-27 14:15:33,062 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 14:15:33,062 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 35 treesize of output 36 [2023-08-27 14:15:33,078 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 14:15:33,079 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 2451 treesize of output 2403 [2023-08-27 14:15:33,092 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 290 treesize of output 258 [2023-08-27 14:15:33,101 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 127 treesize of output 123 [2023-08-27 14:15:33,108 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 254 treesize of output 238 [2023-08-27 14:15:33,117 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 122 treesize of output 114 [2023-08-27 14:15:33,323 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 14:15:33,323 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2122411478] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 14:15:33,323 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 14:15:33,323 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 32 [2023-08-27 14:15:33,324 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [324874590] [2023-08-27 14:15:33,324 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 14:15:33,324 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2023-08-27 14:15:33,324 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 14:15:33,325 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2023-08-27 14:15:33,325 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=931, Unknown=17, NotChecked=62, Total=1122 [2023-08-27 14:15:33,327 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 119 out of 352 [2023-08-27 14:15:33,329 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 98 places, 88 transitions, 709 flow. Second operand has 34 states, 34 states have (on average 120.32352941176471) internal successors, (4091), 34 states have internal predecessors, (4091), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:15:33,329 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 14:15:33,329 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 119 of 352 [2023-08-27 14:15:33,329 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 14:15:36,708 INFO L124 PetriNetUnfolderBase]: 25275/32669 cut-off events. [2023-08-27 14:15:36,708 INFO L125 PetriNetUnfolderBase]: For 114526/114526 co-relation queries the response was YES. [2023-08-27 14:15:36,888 INFO L83 FinitePrefix]: Finished finitePrefix Result has 132140 conditions, 32669 events. 25275/32669 cut-off events. For 114526/114526 co-relation queries the response was YES. Maximal size of possible extension queue 800. Compared 151319 event pairs, 10844 based on Foata normal form. 449/31512 useless extension candidates. Maximal degree in co-relation 132105. Up to 16555 conditions per place. [2023-08-27 14:15:37,005 INFO L140 encePairwiseOnDemand]: 345/352 looper letters, 169 selfloop transitions, 22 changer transitions 0/191 dead transitions. [2023-08-27 14:15:37,005 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 107 places, 191 transitions, 1507 flow [2023-08-27 14:15:37,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-08-27 14:15:37,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-08-27 14:15:37,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 1315 transitions. [2023-08-27 14:15:37,007 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37357954545454547 [2023-08-27 14:15:37,007 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 1315 transitions. [2023-08-27 14:15:37,007 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 1315 transitions. [2023-08-27 14:15:37,008 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 14:15:37,008 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 1315 transitions. [2023-08-27 14:15:37,009 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 131.5) internal successors, (1315), 10 states have internal predecessors, (1315), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:15:37,012 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 352.0) internal successors, (3872), 11 states have internal predecessors, (3872), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:15:37,012 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 352.0) internal successors, (3872), 11 states have internal predecessors, (3872), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:15:37,012 INFO L175 Difference]: Start difference. First operand has 98 places, 88 transitions, 709 flow. Second operand 10 states and 1315 transitions. [2023-08-27 14:15:37,012 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 107 places, 191 transitions, 1507 flow [2023-08-27 14:15:38,451 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 103 places, 191 transitions, 1481 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-08-27 14:15:38,453 INFO L231 Difference]: Finished difference. Result has 104 places, 90 transitions, 768 flow [2023-08-27 14:15:38,454 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=352, PETRI_DIFFERENCE_MINUEND_FLOW=687, PETRI_DIFFERENCE_MINUEND_PLACES=94, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=88, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=768, PETRI_PLACES=104, PETRI_TRANSITIONS=90} [2023-08-27 14:15:38,454 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 52 predicate places. [2023-08-27 14:15:38,454 INFO L495 AbstractCegarLoop]: Abstraction has has 104 places, 90 transitions, 768 flow [2023-08-27 14:15:38,455 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 120.32352941176471) internal successors, (4091), 34 states have internal predecessors, (4091), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:15:38,455 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 14:15:38,455 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 14:15:38,461 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 14:15:38,655 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 14:15:38,656 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting thread4Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 24 more)] === [2023-08-27 14:15:38,656 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 14:15:38,656 INFO L85 PathProgramCache]: Analyzing trace with hash -593020243, now seen corresponding path program 2 times [2023-08-27 14:15:38,656 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 14:15:38,656 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [295727531] [2023-08-27 14:15:38,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 14:15:38,656 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 14:15:38,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 14:15:38,939 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 14:15:38,939 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 14:15:38,939 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [295727531] [2023-08-27 14:15:38,939 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [295727531] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 14:15:38,939 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2015046994] [2023-08-27 14:15:38,939 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-27 14:15:38,940 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 14:15:38,940 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 14:15:38,940 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 14:15:38,944 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 14:15:39,074 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-27 14:15:39,074 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 14:15:39,075 INFO L262 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 27 conjunts are in the unsatisfiable core [2023-08-27 14:15:39,077 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 14:15:39,112 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 14:15:39,148 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-27 14:15:39,149 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 16 treesize of output 18 [2023-08-27 14:15:39,196 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-27 14:15:39,197 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 16 treesize of output 18 [2023-08-27 14:15:39,232 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-27 14:15:39,233 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 16 treesize of output 18 [2023-08-27 14:15:39,258 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-27 14:15:39,259 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 16 treesize of output 18 [2023-08-27 14:15:39,278 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2023-08-27 14:15:39,289 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 14:15:39,290 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 14:15:43,467 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1286 (Array Int Int)) (v_ArrVal_1285 (Array Int Int)) (v_ArrVal_1284 (Array Int Int)) (v_ArrVal_1283 (Array Int Int))) (< 0 (+ (select (select (store (store (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_1283) |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1284) |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_1285) |c_ULTIMATE.start_main_~#t4~0#1.base| v_ArrVal_1286) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset|) 2147483650))) is different from false [2023-08-27 14:15:43,475 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 14:15:43,476 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 34 [2023-08-27 14:15:43,485 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 14:15:43,486 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 4387 treesize of output 4323 [2023-08-27 14:15:43,502 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 129 treesize of output 125 [2023-08-27 14:15:43,510 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 125 treesize of output 123 [2023-08-27 14:15:43,515 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 254 treesize of output 238 [2023-08-27 14:15:43,522 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 122 treesize of output 114 [2023-08-27 14:15:43,622 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 1 not checked. [2023-08-27 14:15:43,623 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2015046994] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 14:15:43,623 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 14:15:43,623 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 20 [2023-08-27 14:15:43,623 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1125278328] [2023-08-27 14:15:43,623 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 14:15:43,623 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-08-27 14:15:43,624 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 14:15:43,624 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-08-27 14:15:43,624 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=323, Unknown=10, NotChecked=38, Total=462 [2023-08-27 14:15:43,625 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 124 out of 352 [2023-08-27 14:15:43,626 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 104 places, 90 transitions, 768 flow. Second operand has 22 states, 22 states have (on average 125.95454545454545) internal successors, (2771), 22 states have internal predecessors, (2771), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:15:43,626 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 14:15:43,626 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 124 of 352 [2023-08-27 14:15:43,626 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 14:15:45,750 INFO L124 PetriNetUnfolderBase]: 19658/25600 cut-off events. [2023-08-27 14:15:45,750 INFO L125 PetriNetUnfolderBase]: For 126380/127761 co-relation queries the response was YES. [2023-08-27 14:15:45,842 INFO L83 FinitePrefix]: Finished finitePrefix Result has 108416 conditions, 25600 events. 19658/25600 cut-off events. For 126380/127761 co-relation queries the response was YES. Maximal size of possible extension queue 882. Compared 124506 event pairs, 10699 based on Foata normal form. 1955/26064 useless extension candidates. Maximal degree in co-relation 108380. Up to 25454 conditions per place. [2023-08-27 14:15:45,921 INFO L140 encePairwiseOnDemand]: 348/352 looper letters, 77 selfloop transitions, 6 changer transitions 0/89 dead transitions. [2023-08-27 14:15:45,921 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 107 places, 89 transitions, 926 flow [2023-08-27 14:15:45,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-27 14:15:45,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-27 14:15:45,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 653 transitions. [2023-08-27 14:15:45,923 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3710227272727273 [2023-08-27 14:15:45,923 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 653 transitions. [2023-08-27 14:15:45,923 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 653 transitions. [2023-08-27 14:15:45,923 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 14:15:45,923 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 653 transitions. [2023-08-27 14:15:45,924 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 130.6) internal successors, (653), 5 states have internal predecessors, (653), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:15:45,925 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 352.0) internal successors, (2112), 6 states have internal predecessors, (2112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:15:45,925 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 352.0) internal successors, (2112), 6 states have internal predecessors, (2112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:15:45,925 INFO L175 Difference]: Start difference. First operand has 104 places, 90 transitions, 768 flow. Second operand 5 states and 653 transitions. [2023-08-27 14:15:45,925 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 107 places, 89 transitions, 926 flow [2023-08-27 14:15:46,438 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 97 places, 89 transitions, 838 flow, removed 17 selfloop flow, removed 10 redundant places. [2023-08-27 14:15:46,439 INFO L231 Difference]: Finished difference. Result has 97 places, 89 transitions, 684 flow [2023-08-27 14:15:46,440 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=352, PETRI_DIFFERENCE_MINUEND_FLOW=672, PETRI_DIFFERENCE_MINUEND_PLACES=93, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=89, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=83, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=684, PETRI_PLACES=97, PETRI_TRANSITIONS=89} [2023-08-27 14:15:46,440 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 45 predicate places. [2023-08-27 14:15:46,440 INFO L495 AbstractCegarLoop]: Abstraction has has 97 places, 89 transitions, 684 flow [2023-08-27 14:15:46,440 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 125.95454545454545) internal successors, (2771), 22 states have internal predecessors, (2771), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:15:46,440 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 14:15:46,440 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 14:15:46,445 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2023-08-27 14:15:46,641 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2023-08-27 14:15:46,641 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting thread3Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 24 more)] === [2023-08-27 14:15:46,641 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 14:15:46,641 INFO L85 PathProgramCache]: Analyzing trace with hash 683520317, now seen corresponding path program 5 times [2023-08-27 14:15:46,642 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 14:15:46,642 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1038255447] [2023-08-27 14:15:46,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 14:15:46,642 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 14:15:46,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 14:15:46,787 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 14:15:46,788 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 14:15:46,788 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1038255447] [2023-08-27 14:15:46,788 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1038255447] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 14:15:46,788 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [560941291] [2023-08-27 14:15:46,788 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-27 14:15:46,788 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 14:15:46,788 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 14:15:46,789 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 14:15:46,816 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 14:15:46,941 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-08-27 14:15:46,941 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 14:15:46,943 INFO L262 TraceCheckSpWp]: Trace formula consists of 257 conjuncts, 12 conjunts are in the unsatisfiable core [2023-08-27 14:15:46,943 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 14:15:47,067 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 14:15:47,068 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 14:15:47,173 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 14:15:47,174 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [560941291] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 14:15:47,174 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 14:15:47,174 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 22 [2023-08-27 14:15:47,174 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [26963030] [2023-08-27 14:15:47,174 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 14:15:47,174 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-08-27 14:15:47,175 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 14:15:47,175 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-08-27 14:15:47,175 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=149, Invalid=403, Unknown=0, NotChecked=0, Total=552 [2023-08-27 14:15:47,177 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 134 out of 352 [2023-08-27 14:15:47,179 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 97 places, 89 transitions, 684 flow. Second operand has 24 states, 24 states have (on average 135.33333333333334) internal successors, (3248), 24 states have internal predecessors, (3248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:15:47,179 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 14:15:47,179 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 134 of 352 [2023-08-27 14:15:47,179 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 14:15:50,796 INFO L124 PetriNetUnfolderBase]: 32127/41592 cut-off events. [2023-08-27 14:15:50,796 INFO L125 PetriNetUnfolderBase]: For 101532/101532 co-relation queries the response was YES. [2023-08-27 14:15:50,987 INFO L83 FinitePrefix]: Finished finitePrefix Result has 156359 conditions, 41592 events. 32127/41592 cut-off events. For 101532/101532 co-relation queries the response was YES. Maximal size of possible extension queue 994. Compared 199413 event pairs, 10609 based on Foata normal form. 876/40490 useless extension candidates. Maximal degree in co-relation 156328. Up to 14460 conditions per place. [2023-08-27 14:15:51,106 INFO L140 encePairwiseOnDemand]: 345/352 looper letters, 197 selfloop transitions, 41 changer transitions 0/238 dead transitions. [2023-08-27 14:15:51,107 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 107 places, 238 transitions, 1871 flow [2023-08-27 14:15:51,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-08-27 14:15:51,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-08-27 14:15:51,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 1612 transitions. [2023-08-27 14:15:51,108 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41632231404958675 [2023-08-27 14:15:51,109 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 1612 transitions. [2023-08-27 14:15:51,109 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 1612 transitions. [2023-08-27 14:15:51,109 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 14:15:51,109 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 1612 transitions. [2023-08-27 14:15:51,110 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 146.54545454545453) internal successors, (1612), 11 states have internal predecessors, (1612), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:15:51,113 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 352.0) internal successors, (4224), 12 states have internal predecessors, (4224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:15:51,113 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 352.0) internal successors, (4224), 12 states have internal predecessors, (4224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:15:51,113 INFO L175 Difference]: Start difference. First operand has 97 places, 89 transitions, 684 flow. Second operand 11 states and 1612 transitions. [2023-08-27 14:15:51,113 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 107 places, 238 transitions, 1871 flow [2023-08-27 14:15:52,625 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 104 places, 238 transitions, 1863 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-08-27 14:15:52,627 INFO L231 Difference]: Finished difference. Result has 109 places, 104 transitions, 1033 flow [2023-08-27 14:15:52,627 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=352, PETRI_DIFFERENCE_MINUEND_FLOW=676, PETRI_DIFFERENCE_MINUEND_PLACES=94, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=89, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=1033, PETRI_PLACES=109, PETRI_TRANSITIONS=104} [2023-08-27 14:15:52,627 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 57 predicate places. [2023-08-27 14:15:52,627 INFO L495 AbstractCegarLoop]: Abstraction has has 109 places, 104 transitions, 1033 flow [2023-08-27 14:15:52,628 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 135.33333333333334) internal successors, (3248), 24 states have internal predecessors, (3248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:15:52,628 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 14:15:52,628 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 14:15:52,633 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 14:15:52,833 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2023-08-27 14:15:52,833 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting thread3Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 24 more)] === [2023-08-27 14:15:52,833 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 14:15:52,833 INFO L85 PathProgramCache]: Analyzing trace with hash -74045066, now seen corresponding path program 6 times [2023-08-27 14:15:52,833 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 14:15:52,834 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [590467703] [2023-08-27 14:15:52,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 14:15:52,834 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 14:15:52,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 14:15:53,367 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 14:15:53,368 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 14:15:53,368 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [590467703] [2023-08-27 14:15:53,368 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [590467703] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 14:15:53,368 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1807490604] [2023-08-27 14:15:53,368 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-27 14:15:53,368 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 14:15:53,368 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 14:15:53,373 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 14:15:53,376 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 14:15:53,599 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-08-27 14:15:53,599 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 14:15:53,601 INFO L262 TraceCheckSpWp]: Trace formula consists of 268 conjuncts, 46 conjunts are in the unsatisfiable core [2023-08-27 14:15:53,602 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 14:15:53,718 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 14:15:53,752 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-27 14:15:53,753 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 16 treesize of output 18 [2023-08-27 14:15:53,787 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-27 14:15:53,789 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 16 treesize of output 18 [2023-08-27 14:15:53,831 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-27 14:15:53,832 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 16 treesize of output 18 [2023-08-27 14:15:53,850 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 20 [2023-08-27 14:15:53,881 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 20 [2023-08-27 14:15:53,914 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2023-08-27 14:15:53,936 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 14:15:53,936 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 14:15:54,122 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1447 (Array Int Int)) (v_ArrVal_1446 (Array Int Int)) (v_ArrVal_1445 (Array Int Int))) (< 0 (+ 2147483650 (select (select (store (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_1445) |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1446) |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_1447) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|) (+ 12 |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset|))))) is different from false [2023-08-27 14:15:54,131 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 14:15:54,131 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 32 treesize of output 33 [2023-08-27 14:15:54,140 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 14:15:54,140 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 157 treesize of output 151 [2023-08-27 14:15:54,145 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 138 treesize of output 122 [2023-08-27 14:15:54,150 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 122 treesize of output 114 [2023-08-27 14:15:54,156 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 58 treesize of output 54 [2023-08-27 14:15:54,345 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 4 not checked. [2023-08-27 14:15:54,345 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1807490604] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 14:15:54,345 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 14:15:54,345 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 34 [2023-08-27 14:15:54,345 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1312770119] [2023-08-27 14:15:54,345 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 14:15:54,346 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2023-08-27 14:15:54,346 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 14:15:54,346 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2023-08-27 14:15:54,346 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=1063, Unknown=10, NotChecked=66, Total=1260 [2023-08-27 14:15:54,348 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 122 out of 352 [2023-08-27 14:15:54,350 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 109 places, 104 transitions, 1033 flow. Second operand has 36 states, 36 states have (on average 123.27777777777777) internal successors, (4438), 36 states have internal predecessors, (4438), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:15:54,351 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 14:15:54,351 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 122 of 352 [2023-08-27 14:15:54,351 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 14:15:58,887 INFO L124 PetriNetUnfolderBase]: 32279/41779 cut-off events. [2023-08-27 14:15:58,887 INFO L125 PetriNetUnfolderBase]: For 178611/178611 co-relation queries the response was YES. [2023-08-27 14:15:59,246 INFO L83 FinitePrefix]: Finished finitePrefix Result has 176395 conditions, 41779 events. 32279/41779 cut-off events. For 178611/178611 co-relation queries the response was YES. Maximal size of possible extension queue 1068. Compared 201465 event pairs, 17545 based on Foata normal form. 35/39829 useless extension candidates. Maximal degree in co-relation 176359. Up to 40432 conditions per place. [2023-08-27 14:15:59,390 INFO L140 encePairwiseOnDemand]: 344/352 looper letters, 166 selfloop transitions, 23 changer transitions 0/189 dead transitions. [2023-08-27 14:15:59,390 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 120 places, 189 transitions, 1851 flow [2023-08-27 14:15:59,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-08-27 14:15:59,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-08-27 14:15:59,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 1566 transitions. [2023-08-27 14:15:59,392 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37073863636363635 [2023-08-27 14:15:59,392 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 1566 transitions. [2023-08-27 14:15:59,392 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 1566 transitions. [2023-08-27 14:15:59,393 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 14:15:59,393 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 1566 transitions. [2023-08-27 14:15:59,394 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 130.5) internal successors, (1566), 12 states have internal predecessors, (1566), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:15:59,397 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 352.0) internal successors, (4576), 13 states have internal predecessors, (4576), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:15:59,397 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 352.0) internal successors, (4576), 13 states have internal predecessors, (4576), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:15:59,397 INFO L175 Difference]: Start difference. First operand has 109 places, 104 transitions, 1033 flow. Second operand 12 states and 1566 transitions. [2023-08-27 14:15:59,397 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 120 places, 189 transitions, 1851 flow [2023-08-27 14:16:01,859 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 115 places, 189 transitions, 1828 flow, removed 5 selfloop flow, removed 5 redundant places. [2023-08-27 14:16:01,861 INFO L231 Difference]: Finished difference. Result has 119 places, 111 transitions, 1170 flow [2023-08-27 14:16:01,861 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=352, PETRI_DIFFERENCE_MINUEND_FLOW=1010, PETRI_DIFFERENCE_MINUEND_PLACES=104, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=104, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=82, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=1170, PETRI_PLACES=119, PETRI_TRANSITIONS=111} [2023-08-27 14:16:01,862 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 67 predicate places. [2023-08-27 14:16:01,862 INFO L495 AbstractCegarLoop]: Abstraction has has 119 places, 111 transitions, 1170 flow [2023-08-27 14:16:01,862 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 123.27777777777777) internal successors, (4438), 36 states have internal predecessors, (4438), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:16:01,863 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 14:16:01,863 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 14:16:01,869 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2023-08-27 14:16:02,064 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2023-08-27 14:16:02,064 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting thread3Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 24 more)] === [2023-08-27 14:16:02,065 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 14:16:02,065 INFO L85 PathProgramCache]: Analyzing trace with hash 1987568101, now seen corresponding path program 3 times [2023-08-27 14:16:02,065 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 14:16:02,065 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1118436395] [2023-08-27 14:16:02,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 14:16:02,065 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 14:16:02,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 14:16:02,646 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 14:16:02,646 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 14:16:02,646 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1118436395] [2023-08-27 14:16:02,646 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1118436395] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 14:16:02,646 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [164276139] [2023-08-27 14:16:02,646 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-27 14:16:02,646 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 14:16:02,646 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 14:16:02,648 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 14:16:02,651 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 14:16:02,854 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-08-27 14:16:02,854 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 14:16:02,856 INFO L262 TraceCheckSpWp]: Trace formula consists of 276 conjuncts, 48 conjunts are in the unsatisfiable core [2023-08-27 14:16:02,858 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 14:16:03,008 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 14:16:03,053 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-27 14:16:03,053 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 16 treesize of output 18 [2023-08-27 14:16:03,100 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-27 14:16:03,100 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 16 treesize of output 18 [2023-08-27 14:16:03,138 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-27 14:16:03,139 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 16 treesize of output 18 [2023-08-27 14:16:03,200 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-27 14:16:03,201 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 16 treesize of output 18 [2023-08-27 14:16:03,212 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 20 [2023-08-27 14:16:03,248 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 20 [2023-08-27 14:16:03,284 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 20 [2023-08-27 14:16:03,312 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 14:16:03,313 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 14:16:03,442 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1543 (Array Int Int))) (< 0 (+ (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t4~0#1.base| v_ArrVal_1543) c_~A~0.base) (+ c_~A~0.offset 12)) 2147483650))) is different from false [2023-08-27 14:16:03,495 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1543 (Array Int Int)) (v_ArrVal_1542 (Array Int Int)) (v_ArrVal_1541 (Array Int Int))) (< 0 (+ 2147483650 (select (select (store (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1541) |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_1542) |c_ULTIMATE.start_main_~#t4~0#1.base| v_ArrVal_1543) c_~A~0.base) (+ c_~A~0.offset 12))))) is different from false [2023-08-27 14:16:05,622 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 14:16:05,623 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 35 treesize of output 36 [2023-08-27 14:16:05,635 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 14:16:05,636 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19587 treesize of output 19203 [2023-08-27 14:16:05,659 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 143 treesize of output 135 [2023-08-27 14:16:05,666 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 135 treesize of output 131 [2023-08-27 14:16:05,681 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 278 treesize of output 246 [2023-08-27 14:16:05,690 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 130 treesize of output 114 [2023-08-27 14:16:05,947 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 14:16:05,948 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [164276139] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 14:16:05,948 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 14:16:05,948 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 38 [2023-08-27 14:16:05,948 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [955782366] [2023-08-27 14:16:05,948 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 14:16:05,948 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2023-08-27 14:16:05,949 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 14:16:05,949 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2023-08-27 14:16:05,949 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=1269, Unknown=17, NotChecked=146, Total=1560 [2023-08-27 14:16:05,951 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 119 out of 352 [2023-08-27 14:16:05,954 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 119 places, 111 transitions, 1170 flow. Second operand has 40 states, 40 states have (on average 120.275) internal successors, (4811), 40 states have internal predecessors, (4811), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:16:05,954 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 14:16:05,954 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 119 of 352 [2023-08-27 14:16:05,954 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 14:16:11,345 INFO L124 PetriNetUnfolderBase]: 33962/43865 cut-off events. [2023-08-27 14:16:11,345 INFO L125 PetriNetUnfolderBase]: For 224688/224688 co-relation queries the response was YES. [2023-08-27 14:16:11,586 INFO L83 FinitePrefix]: Finished finitePrefix Result has 187556 conditions, 43865 events. 33962/43865 cut-off events. For 224688/224688 co-relation queries the response was YES. Maximal size of possible extension queue 999. Compared 213336 event pairs, 13521 based on Foata normal form. 403/42197 useless extension candidates. Maximal degree in co-relation 187516. Up to 27130 conditions per place. [2023-08-27 14:16:11,738 INFO L140 encePairwiseOnDemand]: 345/352 looper letters, 205 selfloop transitions, 27 changer transitions 0/232 dead transitions. [2023-08-27 14:16:11,738 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 130 places, 232 transitions, 2095 flow [2023-08-27 14:16:11,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-08-27 14:16:11,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-08-27 14:16:11,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 1568 transitions. [2023-08-27 14:16:11,741 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3712121212121212 [2023-08-27 14:16:11,741 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 1568 transitions. [2023-08-27 14:16:11,741 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 1568 transitions. [2023-08-27 14:16:11,741 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 14:16:11,741 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 1568 transitions. [2023-08-27 14:16:11,743 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 130.66666666666666) internal successors, (1568), 12 states have internal predecessors, (1568), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:16:11,745 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 352.0) internal successors, (4576), 13 states have internal predecessors, (4576), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:16:11,745 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 352.0) internal successors, (4576), 13 states have internal predecessors, (4576), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:16:11,745 INFO L175 Difference]: Start difference. First operand has 119 places, 111 transitions, 1170 flow. Second operand 12 states and 1568 transitions. [2023-08-27 14:16:11,745 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 130 places, 232 transitions, 2095 flow [2023-08-27 14:16:13,072 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 125 places, 232 transitions, 2041 flow, removed 20 selfloop flow, removed 5 redundant places. [2023-08-27 14:16:13,074 INFO L231 Difference]: Finished difference. Result has 126 places, 113 transitions, 1215 flow [2023-08-27 14:16:13,074 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=352, PETRI_DIFFERENCE_MINUEND_FLOW=1116, PETRI_DIFFERENCE_MINUEND_PLACES=114, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=111, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=84, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=1215, PETRI_PLACES=126, PETRI_TRANSITIONS=113} [2023-08-27 14:16:13,074 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 74 predicate places. [2023-08-27 14:16:13,075 INFO L495 AbstractCegarLoop]: Abstraction has has 126 places, 113 transitions, 1215 flow [2023-08-27 14:16:13,075 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 120.275) internal successors, (4811), 40 states have internal predecessors, (4811), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:16:13,075 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 14:16:13,075 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 14:16:13,080 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 14:16:13,280 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2023-08-27 14:16:13,280 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting thread3Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 24 more)] === [2023-08-27 14:16:13,281 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 14:16:13,281 INFO L85 PathProgramCache]: Analyzing trace with hash 1999573874, now seen corresponding path program 7 times [2023-08-27 14:16:13,281 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 14:16:13,281 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1032746205] [2023-08-27 14:16:13,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 14:16:13,281 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 14:16:13,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 14:16:13,465 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 6 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 14:16:13,466 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 14:16:13,466 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1032746205] [2023-08-27 14:16:13,466 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1032746205] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 14:16:13,466 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [190215609] [2023-08-27 14:16:13,466 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-27 14:16:13,466 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 14:16:13,467 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 14:16:13,469 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 14:16:13,478 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 14:16:13,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 14:16:13,659 INFO L262 TraceCheckSpWp]: Trace formula consists of 283 conjuncts, 14 conjunts are in the unsatisfiable core [2023-08-27 14:16:13,661 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 14:16:13,858 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 10 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 14:16:13,858 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 14:16:14,020 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 10 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 14:16:14,020 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [190215609] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 14:16:14,021 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 14:16:14,021 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 27 [2023-08-27 14:16:14,021 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [948079042] [2023-08-27 14:16:14,021 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 14:16:14,021 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2023-08-27 14:16:14,021 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 14:16:14,022 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2023-08-27 14:16:14,022 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=208, Invalid=604, Unknown=0, NotChecked=0, Total=812 [2023-08-27 14:16:14,024 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 134 out of 352 [2023-08-27 14:16:14,027 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 126 places, 113 transitions, 1215 flow. Second operand has 29 states, 29 states have (on average 135.27586206896552) internal successors, (3923), 29 states have internal predecessors, (3923), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:16:14,027 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 14:16:14,027 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 134 of 352 [2023-08-27 14:16:14,027 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 14:16:19,782 INFO L124 PetriNetUnfolderBase]: 45244/58323 cut-off events. [2023-08-27 14:16:19,783 INFO L125 PetriNetUnfolderBase]: For 260135/260135 co-relation queries the response was YES. [2023-08-27 14:16:20,169 INFO L83 FinitePrefix]: Finished finitePrefix Result has 260342 conditions, 58323 events. 45244/58323 cut-off events. For 260135/260135 co-relation queries the response was YES. Maximal size of possible extension queue 1316. Compared 287149 event pairs, 13047 based on Foata normal form. 876/56463 useless extension candidates. Maximal degree in co-relation 260300. Up to 17148 conditions per place. [2023-08-27 14:16:20,374 INFO L140 encePairwiseOnDemand]: 345/352 looper letters, 230 selfloop transitions, 62 changer transitions 0/292 dead transitions. [2023-08-27 14:16:20,374 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 138 places, 292 transitions, 2776 flow [2023-08-27 14:16:20,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-08-27 14:16:20,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-08-27 14:16:20,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 1900 transitions. [2023-08-27 14:16:20,376 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4152097902097902 [2023-08-27 14:16:20,376 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 1900 transitions. [2023-08-27 14:16:20,377 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 1900 transitions. [2023-08-27 14:16:20,377 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 14:16:20,377 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 1900 transitions. [2023-08-27 14:16:20,379 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 146.15384615384616) internal successors, (1900), 13 states have internal predecessors, (1900), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:16:20,381 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 352.0) internal successors, (4928), 14 states have internal predecessors, (4928), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:16:20,381 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 352.0) internal successors, (4928), 14 states have internal predecessors, (4928), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:16:20,381 INFO L175 Difference]: Start difference. First operand has 126 places, 113 transitions, 1215 flow. Second operand 13 states and 1900 transitions. [2023-08-27 14:16:20,381 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 138 places, 292 transitions, 2776 flow [2023-08-27 14:16:28,049 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 128 places, 292 transitions, 2604 flow, removed 44 selfloop flow, removed 10 redundant places. [2023-08-27 14:16:28,051 INFO L231 Difference]: Finished difference. Result has 135 places, 134 transitions, 1643 flow [2023-08-27 14:16:28,051 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=352, PETRI_DIFFERENCE_MINUEND_FLOW=1086, PETRI_DIFFERENCE_MINUEND_PLACES=116, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=113, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=1643, PETRI_PLACES=135, PETRI_TRANSITIONS=134} [2023-08-27 14:16:28,052 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 83 predicate places. [2023-08-27 14:16:28,052 INFO L495 AbstractCegarLoop]: Abstraction has has 135 places, 134 transitions, 1643 flow [2023-08-27 14:16:28,053 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 135.27586206896552) internal successors, (3923), 29 states have internal predecessors, (3923), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:16:28,053 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 14:16:28,053 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 14:16:28,058 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 14:16:28,257 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 14:16:28,258 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting thread3Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 24 more)] === [2023-08-27 14:16:28,258 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 14:16:28,258 INFO L85 PathProgramCache]: Analyzing trace with hash -171286165, now seen corresponding path program 8 times [2023-08-27 14:16:28,258 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 14:16:28,258 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [606631402] [2023-08-27 14:16:28,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 14:16:28,258 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 14:16:28,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 14:16:28,897 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 14:16:28,898 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 14:16:28,898 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [606631402] [2023-08-27 14:16:28,898 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [606631402] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 14:16:28,898 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [564880414] [2023-08-27 14:16:28,898 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-27 14:16:28,898 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 14:16:28,898 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 14:16:28,901 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 14:16:28,934 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 14:16:29,098 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-27 14:16:29,098 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 14:16:29,101 INFO L262 TraceCheckSpWp]: Trace formula consists of 294 conjuncts, 52 conjunts are in the unsatisfiable core [2023-08-27 14:16:29,103 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 14:16:29,281 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 14:16:29,318 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-27 14:16:29,319 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 16 treesize of output 18 [2023-08-27 14:16:29,359 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-27 14:16:29,360 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 16 treesize of output 18 [2023-08-27 14:16:29,392 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-27 14:16:29,392 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 16 treesize of output 18 [2023-08-27 14:16:29,406 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 20 [2023-08-27 14:16:29,434 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 20 [2023-08-27 14:16:29,462 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 20 [2023-08-27 14:16:29,491 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 20 [2023-08-27 14:16:29,516 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 14:16:29,517 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 14:16:29,666 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1726 (Array Int Int))) (< 0 (+ (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_1726) c_~A~0.base) (+ c_~A~0.offset 16)) 2147483650))) is different from false [2023-08-27 14:16:29,674 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1725 (Array Int Int)) (v_ArrVal_1726 (Array Int Int))) (< 0 (+ 2147483650 (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1725) |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_1726) c_~A~0.base) (+ c_~A~0.offset 16))))) is different from false [2023-08-27 14:16:31,778 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 14:16:31,779 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 32 treesize of output 33 [2023-08-27 14:16:31,785 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 14:16:31,786 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 157 treesize of output 151 [2023-08-27 14:16:31,794 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 138 treesize of output 130 [2023-08-27 14:16:31,798 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 130 treesize of output 114 [2023-08-27 14:16:31,803 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 58 treesize of output 54 [2023-08-27 14:16:32,048 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 14:16:32,048 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [564880414] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 14:16:32,048 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 14:16:32,048 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 40 [2023-08-27 14:16:32,049 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1303205511] [2023-08-27 14:16:32,049 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 14:16:32,049 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2023-08-27 14:16:32,049 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 14:16:32,049 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2023-08-27 14:16:32,050 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=1422, Unknown=10, NotChecked=154, Total=1722 [2023-08-27 14:16:32,052 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 122 out of 352 [2023-08-27 14:16:32,054 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 135 places, 134 transitions, 1643 flow. Second operand has 42 states, 42 states have (on average 123.23809523809524) internal successors, (5176), 42 states have internal predecessors, (5176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:16:32,054 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 14:16:32,054 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 122 of 352 [2023-08-27 14:16:32,055 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 14:16:38,786 INFO L124 PetriNetUnfolderBase]: 45396/58510 cut-off events. [2023-08-27 14:16:38,786 INFO L125 PetriNetUnfolderBase]: For 327607/327607 co-relation queries the response was YES. [2023-08-27 14:16:39,209 INFO L83 FinitePrefix]: Finished finitePrefix Result has 265445 conditions, 58510 events. 45396/58510 cut-off events. For 327607/327607 co-relation queries the response was YES. Maximal size of possible extension queue 1352. Compared 289806 event pairs, 24357 based on Foata normal form. 35/55802 useless extension candidates. Maximal degree in co-relation 265400. Up to 57010 conditions per place. [2023-08-27 14:16:39,436 INFO L140 encePairwiseOnDemand]: 344/352 looper letters, 206 selfloop transitions, 28 changer transitions 0/234 dead transitions. [2023-08-27 14:16:39,437 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 148 places, 234 transitions, 2657 flow [2023-08-27 14:16:39,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-08-27 14:16:39,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-08-27 14:16:39,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 1823 transitions. [2023-08-27 14:16:39,439 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36992694805194803 [2023-08-27 14:16:39,439 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 1823 transitions. [2023-08-27 14:16:39,439 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 1823 transitions. [2023-08-27 14:16:39,439 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 14:16:39,440 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 1823 transitions. [2023-08-27 14:16:39,441 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 130.21428571428572) internal successors, (1823), 14 states have internal predecessors, (1823), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:16:39,444 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 352.0) internal successors, (5280), 15 states have internal predecessors, (5280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:16:39,444 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 352.0) internal successors, (5280), 15 states have internal predecessors, (5280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:16:39,444 INFO L175 Difference]: Start difference. First operand has 135 places, 134 transitions, 1643 flow. Second operand 14 states and 1823 transitions. [2023-08-27 14:16:39,444 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 148 places, 234 transitions, 2657 flow [2023-08-27 14:16:44,053 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 143 places, 234 transitions, 2624 flow, removed 10 selfloop flow, removed 5 redundant places. [2023-08-27 14:16:44,056 INFO L231 Difference]: Finished difference. Result has 148 places, 142 transitions, 1820 flow [2023-08-27 14:16:44,056 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=352, PETRI_DIFFERENCE_MINUEND_FLOW=1610, PETRI_DIFFERENCE_MINUEND_PLACES=130, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=134, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=107, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=1820, PETRI_PLACES=148, PETRI_TRANSITIONS=142} [2023-08-27 14:16:44,057 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 96 predicate places. [2023-08-27 14:16:44,057 INFO L495 AbstractCegarLoop]: Abstraction has has 148 places, 142 transitions, 1820 flow [2023-08-27 14:16:44,058 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 123.23809523809524) internal successors, (5176), 42 states have internal predecessors, (5176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:16:44,058 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 14:16:44,058 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 14:16:44,062 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 14:16:44,258 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 14:16:44,259 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting thread3Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 24 more)] === [2023-08-27 14:16:44,259 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 14:16:44,259 INFO L85 PathProgramCache]: Analyzing trace with hash -1387079158, now seen corresponding path program 4 times [2023-08-27 14:16:44,259 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 14:16:44,259 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1289137519] [2023-08-27 14:16:44,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 14:16:44,259 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 14:16:44,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 14:16:44,992 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 14:16:44,992 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 14:16:44,992 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1289137519] [2023-08-27 14:16:44,992 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1289137519] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 14:16:44,993 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [938779187] [2023-08-27 14:16:44,993 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-27 14:16:44,993 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 14:16:44,993 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 14:16:44,997 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 14:16:45,023 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 14:16:45,171 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-27 14:16:45,171 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 14:16:45,173 INFO L262 TraceCheckSpWp]: Trace formula consists of 302 conjuncts, 54 conjunts are in the unsatisfiable core [2023-08-27 14:16:45,176 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 14:16:45,355 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 14:16:45,400 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-27 14:16:45,400 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 16 treesize of output 18 [2023-08-27 14:16:45,445 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-27 14:16:45,446 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 16 treesize of output 18 [2023-08-27 14:16:45,483 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-27 14:16:45,483 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 16 treesize of output 18 [2023-08-27 14:16:45,546 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-27 14:16:45,546 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 16 treesize of output 18 [2023-08-27 14:16:45,554 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 20 [2023-08-27 14:16:45,583 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 20 [2023-08-27 14:16:45,611 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 20 [2023-08-27 14:16:45,643 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 20 [2023-08-27 14:16:45,674 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 14:16:45,675 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 14:16:45,839 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1832 (Array Int Int))) (< 0 (+ (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t4~0#1.base| v_ArrVal_1832) c_~A~0.base) (+ c_~A~0.offset 16)) 2147483650))) is different from false [2023-08-27 14:16:45,957 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1832 (Array Int Int)) (v_ArrVal_1831 (Array Int Int)) (v_ArrVal_1830 (Array Int Int)) (v_ArrVal_1829 (Array Int Int))) (< 0 (+ (select (select (store (store (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_1829) |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1830) |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_1831) |c_ULTIMATE.start_main_~#t4~0#1.base| v_ArrVal_1832) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|) (+ 16 |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset|)) 2147483650))) is different from false [2023-08-27 14:16:45,964 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 14:16:45,965 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 35 treesize of output 36 [2023-08-27 14:16:45,972 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 14:16:45,972 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 1227 treesize of output 1203 [2023-08-27 14:16:45,985 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 143 treesize of output 135 [2023-08-27 14:16:45,990 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 135 treesize of output 119 [2023-08-27 14:16:45,995 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 119 treesize of output 115 [2023-08-27 14:16:46,057 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 142 treesize of output 110 [2023-08-27 14:16:46,236 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 5 not checked. [2023-08-27 14:16:46,237 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [938779187] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 14:16:46,237 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 14:16:46,237 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 44 [2023-08-27 14:16:46,237 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1464474200] [2023-08-27 14:16:46,237 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 14:16:46,237 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2023-08-27 14:16:46,237 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 14:16:46,238 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2023-08-27 14:16:46,238 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=147, Invalid=1739, Unknown=14, NotChecked=170, Total=2070 [2023-08-27 14:16:46,241 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 119 out of 352 [2023-08-27 14:16:46,243 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 148 places, 142 transitions, 1820 flow. Second operand has 46 states, 46 states have (on average 120.23913043478261) internal successors, (5531), 46 states have internal predecessors, (5531), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:16:46,244 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 14:16:46,244 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 119 of 352 [2023-08-27 14:16:46,244 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 14:16:53,992 INFO L124 PetriNetUnfolderBase]: 47079/60596 cut-off events. [2023-08-27 14:16:53,993 INFO L125 PetriNetUnfolderBase]: For 375213/375213 co-relation queries the response was YES. [2023-08-27 14:16:54,481 INFO L83 FinitePrefix]: Finished finitePrefix Result has 277587 conditions, 60596 events. 47079/60596 cut-off events. For 375213/375213 co-relation queries the response was YES. Maximal size of possible extension queue 1353. Compared 299106 event pairs, 20051 based on Foata normal form. 403/58170 useless extension candidates. Maximal degree in co-relation 277537. Up to 41587 conditions per place. [2023-08-27 14:16:54,846 INFO L140 encePairwiseOnDemand]: 345/352 looper letters, 252 selfloop transitions, 33 changer transitions 0/285 dead transitions. [2023-08-27 14:16:54,847 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 161 places, 285 transitions, 2940 flow [2023-08-27 14:16:54,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-08-27 14:16:54,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-08-27 14:16:54,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 1826 transitions. [2023-08-27 14:16:54,849 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3705357142857143 [2023-08-27 14:16:54,849 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 1826 transitions. [2023-08-27 14:16:54,849 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 1826 transitions. [2023-08-27 14:16:54,849 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 14:16:54,849 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 1826 transitions. [2023-08-27 14:16:54,851 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 130.42857142857142) internal successors, (1826), 14 states have internal predecessors, (1826), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:16:54,853 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 352.0) internal successors, (5280), 15 states have internal predecessors, (5280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:16:54,854 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 352.0) internal successors, (5280), 15 states have internal predecessors, (5280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:16:54,854 INFO L175 Difference]: Start difference. First operand has 148 places, 142 transitions, 1820 flow. Second operand 14 states and 1826 transitions. [2023-08-27 14:16:54,854 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 161 places, 285 transitions, 2940 flow [2023-08-27 14:16:59,189 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 155 places, 285 transitions, 2871 flow, removed 26 selfloop flow, removed 6 redundant places. [2023-08-27 14:16:59,191 INFO L231 Difference]: Finished difference. Result has 156 places, 144 transitions, 1870 flow [2023-08-27 14:16:59,191 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=352, PETRI_DIFFERENCE_MINUEND_FLOW=1751, PETRI_DIFFERENCE_MINUEND_PLACES=142, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=142, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=109, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=1870, PETRI_PLACES=156, PETRI_TRANSITIONS=144} [2023-08-27 14:16:59,192 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 104 predicate places. [2023-08-27 14:16:59,192 INFO L495 AbstractCegarLoop]: Abstraction has has 156 places, 144 transitions, 1870 flow [2023-08-27 14:16:59,193 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 120.23913043478261) internal successors, (5531), 46 states have internal predecessors, (5531), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:16:59,193 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 14:16:59,193 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 14:16:59,197 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 14:16:59,393 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 14:16:59,393 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting thread3Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 24 more)] === [2023-08-27 14:16:59,394 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 14:16:59,394 INFO L85 PathProgramCache]: Analyzing trace with hash -1014900195, now seen corresponding path program 9 times [2023-08-27 14:16:59,394 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 14:16:59,394 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [345412956] [2023-08-27 14:16:59,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 14:16:59,394 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 14:16:59,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 14:16:59,614 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 10 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 14:16:59,614 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 14:16:59,614 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [345412956] [2023-08-27 14:16:59,614 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [345412956] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 14:16:59,614 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2139684446] [2023-08-27 14:16:59,614 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-27 14:16:59,615 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 14:16:59,615 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 14:16:59,617 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 14:16:59,632 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 14:16:59,870 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-08-27 14:16:59,870 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 14:16:59,871 INFO L262 TraceCheckSpWp]: Trace formula consists of 309 conjuncts, 16 conjunts are in the unsatisfiable core [2023-08-27 14:16:59,872 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 14:17:00,078 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 15 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 14:17:00,078 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 14:17:00,246 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 15 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 14:17:00,246 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2139684446] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 14:17:00,246 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 14:17:00,246 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 32 [2023-08-27 14:17:00,247 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1134656467] [2023-08-27 14:17:00,247 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 14:17:00,247 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2023-08-27 14:17:00,247 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 14:17:00,247 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2023-08-27 14:17:00,248 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=281, Invalid=841, Unknown=0, NotChecked=0, Total=1122 [2023-08-27 14:17:00,249 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 134 out of 352 [2023-08-27 14:17:00,251 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 156 places, 144 transitions, 1870 flow. Second operand has 34 states, 34 states have (on average 135.23529411764707) internal successors, (4598), 34 states have internal predecessors, (4598), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:17:00,251 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 14:17:00,251 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 134 of 352 [2023-08-27 14:17:00,251 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 14:17:08,282 INFO L124 PetriNetUnfolderBase]: 60196/77327 cut-off events. [2023-08-27 14:17:08,282 INFO L125 PetriNetUnfolderBase]: For 392162/392162 co-relation queries the response was YES. [2023-08-27 14:17:09,206 INFO L83 FinitePrefix]: Finished finitePrefix Result has 367396 conditions, 77327 events. 60196/77327 cut-off events. For 392162/392162 co-relation queries the response was YES. Maximal size of possible extension queue 1560. Compared 386598 event pairs, 15061 based on Foata normal form. 876/74616 useless extension candidates. Maximal degree in co-relation 367344. Up to 22868 conditions per place. [2023-08-27 14:17:09,500 INFO L140 encePairwiseOnDemand]: 345/352 looper letters, 264 selfloop transitions, 87 changer transitions 0/351 dead transitions. [2023-08-27 14:17:09,500 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 170 places, 351 transitions, 3794 flow [2023-08-27 14:17:09,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-08-27 14:17:09,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2023-08-27 14:17:09,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 2188 transitions. [2023-08-27 14:17:09,504 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41439393939393937 [2023-08-27 14:17:09,504 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 2188 transitions. [2023-08-27 14:17:09,504 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 2188 transitions. [2023-08-27 14:17:09,505 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 14:17:09,505 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 2188 transitions. [2023-08-27 14:17:09,507 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 145.86666666666667) internal successors, (2188), 15 states have internal predecessors, (2188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:17:09,511 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 352.0) internal successors, (5632), 16 states have internal predecessors, (5632), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:17:09,511 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 352.0) internal successors, (5632), 16 states have internal predecessors, (5632), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:17:09,511 INFO L175 Difference]: Start difference. First operand has 156 places, 144 transitions, 1870 flow. Second operand 15 states and 2188 transitions. [2023-08-27 14:17:09,511 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 170 places, 351 transitions, 3794 flow [2023-08-27 14:17:26,892 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 158 places, 351 transitions, 3555 flow, removed 56 selfloop flow, removed 12 redundant places. [2023-08-27 14:17:26,894 INFO L231 Difference]: Finished difference. Result has 166 places, 169 transitions, 2455 flow [2023-08-27 14:17:26,895 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=352, PETRI_DIFFERENCE_MINUEND_FLOW=1686, PETRI_DIFFERENCE_MINUEND_PLACES=144, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=144, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=62, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=2455, PETRI_PLACES=166, PETRI_TRANSITIONS=169} [2023-08-27 14:17:26,895 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 114 predicate places. [2023-08-27 14:17:26,895 INFO L495 AbstractCegarLoop]: Abstraction has has 166 places, 169 transitions, 2455 flow [2023-08-27 14:17:26,896 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 135.23529411764707) internal successors, (4598), 34 states have internal predecessors, (4598), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:17:26,896 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 14:17:26,896 INFO L208 CegarLoopForPetriNet]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 14:17:26,900 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2023-08-27 14:17:27,096 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 14:17:27,096 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting thread3Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 24 more)] === [2023-08-27 14:17:27,097 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 14:17:27,097 INFO L85 PathProgramCache]: Analyzing trace with hash 142708182, now seen corresponding path program 10 times [2023-08-27 14:17:27,097 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 14:17:27,097 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [967846346] [2023-08-27 14:17:27,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 14:17:27,097 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 14:17:27,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 14:17:27,852 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 14:17:27,852 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 14:17:27,852 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [967846346] [2023-08-27 14:17:27,852 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [967846346] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 14:17:27,852 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [945739257] [2023-08-27 14:17:27,852 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-27 14:17:27,852 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 14:17:27,852 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 14:17:27,853 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 14:17:27,855 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 14:17:28,030 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-27 14:17:28,030 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 14:17:28,032 INFO L262 TraceCheckSpWp]: Trace formula consists of 320 conjuncts, 56 conjunts are in the unsatisfiable core [2023-08-27 14:17:28,035 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 14:17:28,262 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2023-08-27 14:17:28,306 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-27 14:17:28,307 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 18 treesize of output 20 [2023-08-27 14:17:28,350 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-27 14:17:28,350 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 18 treesize of output 20 [2023-08-27 14:17:28,393 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-27 14:17:28,394 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 18 treesize of output 20 [2023-08-27 14:17:28,467 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 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 23 treesize of output 22 [2023-08-27 14:17:28,512 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 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 25 treesize of output 24 [2023-08-27 14:17:28,552 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 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 25 treesize of output 24 [2023-08-27 14:17:28,595 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 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 25 treesize of output 24 [2023-08-27 14:17:28,631 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 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 25 treesize of output 24 [2023-08-27 14:17:28,664 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 14:17:28,664 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 14:17:28,873 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2033 (Array Int Int))) (< 0 (+ 2147483650 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_2033) c_~A~0.base) (+ c_~A~0.offset 20))))) is different from false [2023-08-27 14:17:35,091 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 14:17:35,092 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 32 treesize of output 33 [2023-08-27 14:17:35,099 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 14:17:35,100 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 311 treesize of output 299 [2023-08-27 14:17:35,104 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 138 treesize of output 122 [2023-08-27 14:17:35,109 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 59 treesize of output 55 [2023-08-27 14:17:35,114 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 62 treesize of output 54 [2023-08-27 14:17:35,421 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 14:17:35,421 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [945739257] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 14:17:35,421 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 14:17:35,421 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 48 [2023-08-27 14:17:35,421 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1016426207] [2023-08-27 14:17:35,421 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 14:17:35,422 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2023-08-27 14:17:35,422 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 14:17:35,422 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2023-08-27 14:17:35,423 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=156, Invalid=2183, Unknown=17, NotChecked=94, Total=2450 [2023-08-27 14:17:35,426 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 122 out of 352 [2023-08-27 14:17:35,428 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 166 places, 169 transitions, 2455 flow. Second operand has 50 states, 50 states have (on average 123.2) internal successors, (6160), 50 states have internal predecessors, (6160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:17:35,428 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 14:17:35,428 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 122 of 352 [2023-08-27 14:17:35,428 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 14:17:45,713 INFO L124 PetriNetUnfolderBase]: 60348/77514 cut-off events. [2023-08-27 14:17:45,713 INFO L125 PetriNetUnfolderBase]: For 588210/588210 co-relation queries the response was YES. [2023-08-27 14:17:46,408 INFO L83 FinitePrefix]: Finished finitePrefix Result has 374846 conditions, 77514 events. 60348/77514 cut-off events. For 588210/588210 co-relation queries the response was YES. Maximal size of possible extension queue 1561. Compared 395315 event pairs, 30095 based on Foata normal form. 35/73955 useless extension candidates. Maximal degree in co-relation 374791. Up to 75861 conditions per place. [2023-08-27 14:17:46,677 INFO L140 encePairwiseOnDemand]: 344/352 looper letters, 251 selfloop transitions, 33 changer transitions 0/284 dead transitions. [2023-08-27 14:17:46,677 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 181 places, 284 transitions, 3680 flow [2023-08-27 14:17:46,677 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-08-27 14:17:46,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2023-08-27 14:17:46,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 2080 transitions. [2023-08-27 14:17:46,680 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3693181818181818 [2023-08-27 14:17:46,680 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 2080 transitions. [2023-08-27 14:17:46,680 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 2080 transitions. [2023-08-27 14:17:46,681 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 14:17:46,681 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 2080 transitions. [2023-08-27 14:17:46,683 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 130.0) internal successors, (2080), 16 states have internal predecessors, (2080), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:17:46,686 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 352.0) internal successors, (5984), 17 states have internal predecessors, (5984), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:17:46,687 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 352.0) internal successors, (5984), 17 states have internal predecessors, (5984), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:17:46,687 INFO L175 Difference]: Start difference. First operand has 166 places, 169 transitions, 2455 flow. Second operand 16 states and 2080 transitions. [2023-08-27 14:17:46,687 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 181 places, 284 transitions, 3680 flow [2023-08-27 14:17:53,380 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 175 places, 284 transitions, 3636 flow, removed 14 selfloop flow, removed 6 redundant places. [2023-08-27 14:17:53,383 INFO L231 Difference]: Finished difference. Result has 181 places, 178 transitions, 2676 flow [2023-08-27 14:17:53,384 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=352, PETRI_DIFFERENCE_MINUEND_FLOW=2411, PETRI_DIFFERENCE_MINUEND_PLACES=160, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=169, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=137, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=2676, PETRI_PLACES=181, PETRI_TRANSITIONS=178} [2023-08-27 14:17:53,384 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 129 predicate places. [2023-08-27 14:17:53,384 INFO L495 AbstractCegarLoop]: Abstraction has has 181 places, 178 transitions, 2676 flow [2023-08-27 14:17:53,385 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 123.2) internal successors, (6160), 50 states have internal predecessors, (6160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:17:53,385 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 14:17:53,385 INFO L208 CegarLoopForPetriNet]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 14:17:53,389 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 14:17:53,585 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 14:17:53,586 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting thread3Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 24 more)] === [2023-08-27 14:17:53,586 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 14:17:53,586 INFO L85 PathProgramCache]: Analyzing trace with hash 116984197, now seen corresponding path program 5 times [2023-08-27 14:17:53,586 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 14:17:53,586 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [477030585] [2023-08-27 14:17:53,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 14:17:53,586 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 14:17:53,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 14:17:54,453 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 14:17:54,453 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 14:17:54,453 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [477030585] [2023-08-27 14:17:54,453 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [477030585] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 14:17:54,453 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1562069868] [2023-08-27 14:17:54,453 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-27 14:17:54,453 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 14:17:54,454 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 14:17:54,456 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 14:17:54,457 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 14:17:54,709 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2023-08-27 14:17:54,710 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 14:17:54,712 INFO L262 TraceCheckSpWp]: Trace formula consists of 328 conjuncts, 60 conjunts are in the unsatisfiable core [2023-08-27 14:17:54,714 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 14:17:54,947 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-08-27 14:17:54,998 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-27 14:17:54,999 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 16 treesize of output 18 [2023-08-27 14:17:55,044 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-27 14:17:55,045 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 16 treesize of output 18 [2023-08-27 14:17:55,098 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-27 14:17:55,099 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 16 treesize of output 18 [2023-08-27 14:17:55,172 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 20 [2023-08-27 14:17:55,208 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 20 [2023-08-27 14:17:55,245 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-27 14:17:55,246 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 16 treesize of output 18 [2023-08-27 14:17:55,276 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 20 [2023-08-27 14:17:55,314 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 20 [2023-08-27 14:17:55,348 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 20 [2023-08-27 14:17:55,376 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 14:17:55,377 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 14:17:55,484 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2153 (Array Int Int))) (< 0 (+ 2147483650 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t4~0#1.base| v_ArrVal_2153) c_~A~0.base) (+ c_~A~0.offset (* 4 |c_thread3Thread1of1ForFork2_~i~2#1|) 12))))) is different from false [2023-08-27 14:17:55,488 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2151 Int) (v_ArrVal_2153 (Array Int Int))) (< 0 (+ 2147483650 (let ((.cse0 (* 4 |c_thread3Thread1of1ForFork2_~i~2#1|))) (select (select (store (store |c_#memory_int| c_~A~0.base (store (select |c_#memory_int| c_~A~0.base) (+ c_~A~0.offset .cse0) v_ArrVal_2151)) |c_ULTIMATE.start_main_~#t4~0#1.base| v_ArrVal_2153) c_~A~0.base) (+ c_~A~0.offset .cse0 16)))))) is different from false [2023-08-27 14:17:55,876 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 14:17:55,876 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 69 treesize of output 58 [2023-08-27 14:17:55,885 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 14:17:55,885 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 615 treesize of output 603 [2023-08-27 14:17:55,891 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 290 treesize of output 258 [2023-08-27 14:17:55,910 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 127 treesize of output 123 [2023-08-27 14:17:55,914 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 254 treesize of output 238 [2023-08-27 14:17:55,921 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 122 treesize of output 114 [2023-08-27 14:17:56,345 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 5 not checked. [2023-08-27 14:17:56,345 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1562069868] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 14:17:56,345 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 14:17:56,345 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 51 [2023-08-27 14:17:56,345 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [919426409] [2023-08-27 14:17:56,345 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 14:17:56,346 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2023-08-27 14:17:56,346 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 14:17:56,346 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2023-08-27 14:17:56,347 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=181, Invalid=2343, Unknown=34, NotChecked=198, Total=2756 [2023-08-27 14:17:56,349 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 119 out of 352 [2023-08-27 14:17:56,350 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 181 places, 178 transitions, 2676 flow. Second operand has 53 states, 53 states have (on average 120.18867924528301) internal successors, (6370), 53 states have internal predecessors, (6370), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:17:56,351 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 14:17:56,351 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 119 of 352 [2023-08-27 14:17:56,351 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 14:18:07,963 INFO L124 PetriNetUnfolderBase]: 62031/79600 cut-off events. [2023-08-27 14:18:07,963 INFO L125 PetriNetUnfolderBase]: For 642371/642371 co-relation queries the response was YES. [2023-08-27 14:18:08,800 INFO L83 FinitePrefix]: Finished finitePrefix Result has 387969 conditions, 79600 events. 62031/79600 cut-off events. For 642371/642371 co-relation queries the response was YES. Maximal size of possible extension queue 1630. Compared 403632 event pairs, 25679 based on Foata normal form. 403/76323 useless extension candidates. Maximal degree in co-relation 387908. Up to 58317 conditions per place. [2023-08-27 14:18:09,085 INFO L140 encePairwiseOnDemand]: 345/352 looper letters, 304 selfloop transitions, 39 changer transitions 0/343 dead transitions. [2023-08-27 14:18:09,086 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 196 places, 343 transitions, 4001 flow [2023-08-27 14:18:09,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-08-27 14:18:09,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2023-08-27 14:18:09,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 2084 transitions. [2023-08-27 14:18:09,089 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3700284090909091 [2023-08-27 14:18:09,089 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 2084 transitions. [2023-08-27 14:18:09,089 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 2084 transitions. [2023-08-27 14:18:09,090 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 14:18:09,090 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 2084 transitions. [2023-08-27 14:18:09,092 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 130.25) internal successors, (2084), 16 states have internal predecessors, (2084), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:18:09,096 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 352.0) internal successors, (5984), 17 states have internal predecessors, (5984), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:18:09,096 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 352.0) internal successors, (5984), 17 states have internal predecessors, (5984), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:18:09,097 INFO L175 Difference]: Start difference. First operand has 181 places, 178 transitions, 2676 flow. Second operand 16 states and 2084 transitions. [2023-08-27 14:18:09,097 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 196 places, 343 transitions, 4001 flow [2023-08-27 14:18:16,623 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 189 places, 343 transitions, 3917 flow, removed 32 selfloop flow, removed 7 redundant places. [2023-08-27 14:18:16,626 INFO L231 Difference]: Finished difference. Result has 190 places, 180 transitions, 2731 flow [2023-08-27 14:18:16,627 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=352, PETRI_DIFFERENCE_MINUEND_FLOW=2592, PETRI_DIFFERENCE_MINUEND_PLACES=174, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=178, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=139, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=2731, PETRI_PLACES=190, PETRI_TRANSITIONS=180} [2023-08-27 14:18:16,627 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 138 predicate places. [2023-08-27 14:18:16,627 INFO L495 AbstractCegarLoop]: Abstraction has has 190 places, 180 transitions, 2731 flow [2023-08-27 14:18:16,628 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 53 states have (on average 120.18867924528301) internal successors, (6370), 53 states have internal predecessors, (6370), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:18:16,628 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 14:18:16,628 INFO L208 CegarLoopForPetriNet]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 14:18:16,634 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 14:18:16,828 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2023-08-27 14:18:16,828 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting thread3Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 24 more)] === [2023-08-27 14:18:16,829 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 14:18:16,829 INFO L85 PathProgramCache]: Analyzing trace with hash 128989970, now seen corresponding path program 11 times [2023-08-27 14:18:16,829 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 14:18:16,829 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2142705071] [2023-08-27 14:18:16,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 14:18:16,829 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 14:18:16,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 14:18:17,048 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 15 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 14:18:17,049 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 14:18:17,049 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2142705071] [2023-08-27 14:18:17,049 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2142705071] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 14:18:17,049 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1629114714] [2023-08-27 14:18:17,049 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-27 14:18:17,049 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 14:18:17,049 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 14:18:17,052 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 14:18:17,057 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 14:18:17,273 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2023-08-27 14:18:17,273 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 14:18:17,275 INFO L262 TraceCheckSpWp]: Trace formula consists of 335 conjuncts, 18 conjunts are in the unsatisfiable core [2023-08-27 14:18:17,276 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 14:18:17,480 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 21 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 14:18:17,480 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 14:18:17,659 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 21 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 14:18:17,659 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1629114714] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 14:18:17,659 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 14:18:17,659 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 37 [2023-08-27 14:18:17,660 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [357744930] [2023-08-27 14:18:17,660 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 14:18:17,660 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2023-08-27 14:18:17,660 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 14:18:17,661 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2023-08-27 14:18:17,661 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=371, Invalid=1111, Unknown=0, NotChecked=0, Total=1482 [2023-08-27 14:18:17,663 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 134 out of 352 [2023-08-27 14:18:17,664 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 190 places, 180 transitions, 2731 flow. Second operand has 39 states, 39 states have (on average 135.2051282051282) internal successors, (5273), 39 states have internal predecessors, (5273), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:18:17,664 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 14:18:17,664 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 134 of 352 [2023-08-27 14:18:17,664 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 14:18:30,470 INFO L124 PetriNetUnfolderBase]: 76983/98604 cut-off events. [2023-08-27 14:18:30,470 INFO L125 PetriNetUnfolderBase]: For 577299/577299 co-relation queries the response was YES. [2023-08-27 14:18:31,532 INFO L83 FinitePrefix]: Finished finitePrefix Result has 495922 conditions, 98604 events. 76983/98604 cut-off events. For 577299/577299 co-relation queries the response was YES. Maximal size of possible extension queue 1913. Compared 500599 event pairs, 18159 based on Foata normal form. 876/94949 useless extension candidates. Maximal degree in co-relation 495859. Up to 29026 conditions per place. [2023-08-27 14:18:31,867 INFO L140 encePairwiseOnDemand]: 345/352 looper letters, 299 selfloop transitions, 116 changer transitions 0/415 dead transitions. [2023-08-27 14:18:31,868 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 206 places, 415 transitions, 5050 flow [2023-08-27 14:18:31,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-08-27 14:18:31,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2023-08-27 14:18:31,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 2476 transitions. [2023-08-27 14:18:31,871 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4137700534759358 [2023-08-27 14:18:31,871 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 2476 transitions. [2023-08-27 14:18:31,871 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 2476 transitions. [2023-08-27 14:18:31,871 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 14:18:31,871 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 2476 transitions. [2023-08-27 14:18:31,873 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 145.64705882352942) internal successors, (2476), 17 states have internal predecessors, (2476), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:18:31,876 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 352.0) internal successors, (6336), 18 states have internal predecessors, (6336), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:18:31,877 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 352.0) internal successors, (6336), 18 states have internal predecessors, (6336), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:18:31,877 INFO L175 Difference]: Start difference. First operand has 190 places, 180 transitions, 2731 flow. Second operand 17 states and 2476 transitions. [2023-08-27 14:18:31,877 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 206 places, 415 transitions, 5050 flow [2023-08-27 14:19:03,672 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 192 places, 415 transitions, 4736 flow, removed 68 selfloop flow, removed 14 redundant places. [2023-08-27 14:19:03,676 INFO L231 Difference]: Finished difference. Result has 201 places, 209 transitions, 3496 flow [2023-08-27 14:19:03,676 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=352, PETRI_DIFFERENCE_MINUEND_FLOW=2484, PETRI_DIFFERENCE_MINUEND_PLACES=176, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=180, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=87, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=3496, PETRI_PLACES=201, PETRI_TRANSITIONS=209} [2023-08-27 14:19:03,676 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 149 predicate places. [2023-08-27 14:19:03,676 INFO L495 AbstractCegarLoop]: Abstraction has has 201 places, 209 transitions, 3496 flow [2023-08-27 14:19:03,677 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 135.2051282051282) internal successors, (5273), 39 states have internal predecessors, (5273), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:19:03,677 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 14:19:03,677 INFO L208 CegarLoopForPetriNet]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 14:19:03,683 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 14:19:03,877 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2023-08-27 14:19:03,878 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting thread3Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 24 more)] === [2023-08-27 14:19:03,878 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 14:19:03,878 INFO L85 PathProgramCache]: Analyzing trace with hash 194110603, now seen corresponding path program 12 times [2023-08-27 14:19:03,878 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 14:19:03,878 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1758098500] [2023-08-27 14:19:03,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 14:19:03,878 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 14:19:03,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 14:19:04,716 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 14:19:04,717 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 14:19:04,717 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1758098500] [2023-08-27 14:19:04,717 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1758098500] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 14:19:04,717 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1064986770] [2023-08-27 14:19:04,717 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-27 14:19:04,717 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 14:19:04,717 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 14:19:04,718 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 14:19:04,719 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 14:19:05,175 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2023-08-27 14:19:05,176 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 14:19:05,178 INFO L262 TraceCheckSpWp]: Trace formula consists of 346 conjuncts, 69 conjunts are in the unsatisfiable core [2023-08-27 14:19:05,180 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 14:19:05,447 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 14:19:05,513 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-27 14:19:05,513 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 16 treesize of output 18 [2023-08-27 14:19:05,575 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-27 14:19:05,576 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 16 treesize of output 18 [2023-08-27 14:19:05,624 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-27 14:19:05,625 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 16 treesize of output 18 [2023-08-27 14:19:05,705 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 20 [2023-08-27 14:19:05,740 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 20 [2023-08-27 14:19:05,776 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 20 [2023-08-27 14:19:05,814 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 20 [2023-08-27 14:19:05,859 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 20 [2023-08-27 14:19:05,898 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 20 [2023-08-27 14:19:05,928 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 14:19:05,929 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 14:19:10,378 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 14:19:10,378 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 32 treesize of output 33 [2023-08-27 14:19:10,386 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 14:19:10,386 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 311 treesize of output 299 [2023-08-27 14:19:10,392 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 138 treesize of output 130 [2023-08-27 14:19:10,398 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 130 treesize of output 114 [2023-08-27 14:19:10,404 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 58 treesize of output 54 [2023-08-27 14:19:10,801 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 14:19:10,801 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1064986770] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 14:19:10,802 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 14:19:10,802 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 18] total 54 [2023-08-27 14:19:10,802 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [705162614] [2023-08-27 14:19:10,802 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 14:19:10,802 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2023-08-27 14:19:10,802 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 14:19:10,803 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2023-08-27 14:19:10,804 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=208, Invalid=2857, Unknown=15, NotChecked=0, Total=3080 [2023-08-27 14:19:10,805 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 110 out of 352 [2023-08-27 14:19:10,807 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 201 places, 209 transitions, 3496 flow. Second operand has 56 states, 56 states have (on average 111.17857142857143) internal successors, (6226), 56 states have internal predecessors, (6226), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:19:10,807 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 14:19:10,807 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 110 of 352 [2023-08-27 14:19:10,807 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 14:19:38,566 INFO L124 PetriNetUnfolderBase]: 126966/162030 cut-off events. [2023-08-27 14:19:38,567 INFO L125 PetriNetUnfolderBase]: For 1095159/1095159 co-relation queries the response was YES. [2023-08-27 14:19:40,236 INFO L83 FinitePrefix]: Finished finitePrefix Result has 899711 conditions, 162030 events. 126966/162030 cut-off events. For 1095159/1095159 co-relation queries the response was YES. Maximal size of possible extension queue 2066. Compared 836323 event pairs, 39791 based on Foata normal form. 1419/156070 useless extension candidates. Maximal degree in co-relation 899645. Up to 78143 conditions per place. [2023-08-27 14:19:40,867 INFO L140 encePairwiseOnDemand]: 342/352 looper letters, 1056 selfloop transitions, 154 changer transitions 0/1210 dead transitions. [2023-08-27 14:19:40,867 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 262 places, 1210 transitions, 12168 flow [2023-08-27 14:19:40,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2023-08-27 14:19:40,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2023-08-27 14:19:40,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 7574 transitions. [2023-08-27 14:19:41,050 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3470491202346041 [2023-08-27 14:19:41,051 INFO L72 ComplementDD]: Start complementDD. Operand 62 states and 7574 transitions. [2023-08-27 14:19:41,051 INFO L73 IsDeterministic]: Start isDeterministic. Operand 62 states and 7574 transitions. [2023-08-27 14:19:41,053 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 14:19:41,053 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 62 states and 7574 transitions. [2023-08-27 14:19:41,062 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 63 states, 62 states have (on average 122.16129032258064) internal successors, (7574), 62 states have internal predecessors, (7574), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:19:41,081 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 63 states, 63 states have (on average 352.0) internal successors, (22176), 63 states have internal predecessors, (22176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:19:41,084 INFO L81 ComplementDD]: Finished complementDD. Result has 63 states, 63 states have (on average 352.0) internal successors, (22176), 63 states have internal predecessors, (22176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:19:41,084 INFO L175 Difference]: Start difference. First operand has 201 places, 209 transitions, 3496 flow. Second operand 62 states and 7574 transitions. [2023-08-27 14:19:41,084 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 262 places, 1210 transitions, 12168 flow [2023-08-27 14:20:11,482 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 255 places, 1210 transitions, 12113 flow, removed 18 selfloop flow, removed 7 redundant places. [2023-08-27 14:20:11,491 INFO L231 Difference]: Finished difference. Result has 271 places, 315 transitions, 6190 flow [2023-08-27 14:20:11,492 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=352, PETRI_DIFFERENCE_MINUEND_FLOW=3441, PETRI_DIFFERENCE_MINUEND_PLACES=194, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=209, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=63, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=138, PETRI_DIFFERENCE_SUBTRAHEND_STATES=62, PETRI_FLOW=6190, PETRI_PLACES=271, PETRI_TRANSITIONS=315} [2023-08-27 14:20:11,492 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 219 predicate places. [2023-08-27 14:20:11,492 INFO L495 AbstractCegarLoop]: Abstraction has has 271 places, 315 transitions, 6190 flow [2023-08-27 14:20:11,493 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 56 states, 56 states have (on average 111.17857142857143) internal successors, (6226), 56 states have internal predecessors, (6226), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:20:11,493 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 14:20:11,493 INFO L208 CegarLoopForPetriNet]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 14:20:11,502 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 14:20:11,699 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 14:20:11,699 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting thread3Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 24 more)] === [2023-08-27 14:20:11,699 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 14:20:11,699 INFO L85 PathProgramCache]: Analyzing trace with hash -392669770, now seen corresponding path program 6 times [2023-08-27 14:20:11,700 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 14:20:11,700 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1502905612] [2023-08-27 14:20:11,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 14:20:11,700 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 14:20:11,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 14:20:12,699 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 14:20:12,700 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 14:20:12,700 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1502905612] [2023-08-27 14:20:12,700 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1502905612] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 14:20:12,700 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1596995221] [2023-08-27 14:20:12,700 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-27 14:20:12,700 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 14:20:12,700 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 14:20:12,701 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 14:20:12,702 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 14:20:13,069 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2023-08-27 14:20:13,070 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 14:20:13,072 INFO L262 TraceCheckSpWp]: Trace formula consists of 354 conjuncts, 66 conjunts are in the unsatisfiable core [2023-08-27 14:20:13,076 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 14:20:13,384 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 14:20:13,428 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-27 14:20:13,429 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 16 treesize of output 18 [2023-08-27 14:20:13,478 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-27 14:20:13,479 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 16 treesize of output 18 [2023-08-27 14:20:13,522 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-27 14:20:13,523 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 16 treesize of output 18 [2023-08-27 14:20:13,560 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-27 14:20:13,562 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 16 treesize of output 18 [2023-08-27 14:20:13,574 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 20 [2023-08-27 14:20:13,605 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 20 [2023-08-27 14:20:13,640 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 20 [2023-08-27 14:20:13,675 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 20 [2023-08-27 14:20:13,709 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 20 [2023-08-27 14:20:13,745 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 20 [2023-08-27 14:20:13,775 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 14:20:13,775 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 14:20:14,073 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2494 (Array Int Int)) (v_ArrVal_2493 (Array Int Int))) (< 0 (+ 2147483650 (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_2493) |c_ULTIMATE.start_main_~#t4~0#1.base| v_ArrVal_2494) c_~A~0.base) (+ c_~A~0.offset 24))))) is different from false [2023-08-27 14:20:14,237 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 14:20:14,238 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 35 treesize of output 36 [2023-08-27 14:20:14,260 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 14:20:14,260 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 615 treesize of output 603 [2023-08-27 14:20:14,272 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 290 treesize of output 274 [2023-08-27 14:20:14,278 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 274 treesize of output 266 [2023-08-27 14:20:14,289 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 134 treesize of output 130 [2023-08-27 14:20:14,296 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 262 treesize of output 230 [2023-08-27 14:20:14,825 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 14:20:14,825 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1596995221] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 14:20:14,825 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 14:20:14,825 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 19] total 55 [2023-08-27 14:20:14,825 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1226716750] [2023-08-27 14:20:14,825 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 14:20:14,825 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 57 states [2023-08-27 14:20:14,826 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 14:20:14,826 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2023-08-27 14:20:14,827 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=202, Invalid=2861, Unknown=21, NotChecked=108, Total=3192 [2023-08-27 14:20:14,829 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 119 out of 352 [2023-08-27 14:20:14,831 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 271 places, 315 transitions, 6190 flow. Second operand has 57 states, 57 states have (on average 120.19298245614036) internal successors, (6851), 57 states have internal predecessors, (6851), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:20:14,831 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 14:20:14,831 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 119 of 352 [2023-08-27 14:20:14,831 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 14:20:41,202 INFO L124 PetriNetUnfolderBase]: 124809/159067 cut-off events. [2023-08-27 14:20:41,203 INFO L125 PetriNetUnfolderBase]: For 1996962/1996962 co-relation queries the response was YES. [2023-08-27 14:20:43,617 INFO L83 FinitePrefix]: Finished finitePrefix Result has 947882 conditions, 159067 events. 124809/159067 cut-off events. For 1996962/1996962 co-relation queries the response was YES. Maximal size of possible extension queue 1951. Compared 818919 event pairs, 61095 based on Foata normal form. 1612/153472 useless extension candidates. Maximal degree in co-relation 947800. Up to 77320 conditions per place. [2023-08-27 14:20:44,466 INFO L140 encePairwiseOnDemand]: 345/352 looper letters, 429 selfloop transitions, 73 changer transitions 0/502 dead transitions. [2023-08-27 14:20:44,466 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 288 places, 502 transitions, 7926 flow [2023-08-27 14:20:44,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-08-27 14:20:44,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2023-08-27 14:20:44,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 2342 transitions. [2023-08-27 14:20:44,469 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3696338383838384 [2023-08-27 14:20:44,469 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 2342 transitions. [2023-08-27 14:20:44,469 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 2342 transitions. [2023-08-27 14:20:44,469 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 14:20:44,469 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 2342 transitions. [2023-08-27 14:20:44,472 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 130.11111111111111) internal successors, (2342), 18 states have internal predecessors, (2342), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:20:44,476 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 352.0) internal successors, (6688), 19 states have internal predecessors, (6688), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:20:44,477 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 352.0) internal successors, (6688), 19 states have internal predecessors, (6688), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:20:44,477 INFO L175 Difference]: Start difference. First operand has 271 places, 315 transitions, 6190 flow. Second operand 18 states and 2342 transitions. [2023-08-27 14:20:44,477 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 288 places, 502 transitions, 7926 flow [2023-08-27 14:21:35,335 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 274 places, 502 transitions, 6924 flow, removed 380 selfloop flow, removed 14 redundant places. [2023-08-27 14:21:35,341 INFO L231 Difference]: Finished difference. Result has 275 places, 317 transitions, 5414 flow [2023-08-27 14:21:35,341 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=352, PETRI_DIFFERENCE_MINUEND_FLOW=5188, PETRI_DIFFERENCE_MINUEND_PLACES=257, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=315, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=71, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=242, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=5414, PETRI_PLACES=275, PETRI_TRANSITIONS=317} [2023-08-27 14:21:35,341 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 223 predicate places. [2023-08-27 14:21:35,341 INFO L495 AbstractCegarLoop]: Abstraction has has 275 places, 317 transitions, 5414 flow [2023-08-27 14:21:35,342 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 57 states, 57 states have (on average 120.19298245614036) internal successors, (6851), 57 states have internal predecessors, (6851), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:21:35,342 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 14:21:35,342 INFO L208 CegarLoopForPetriNet]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 14:21:35,347 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 14:21:35,542 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 14:21:35,543 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting thread3Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 24 more)] === [2023-08-27 14:21:35,543 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 14:21:35,543 INFO L85 PathProgramCache]: Analyzing trace with hash 1722465021, now seen corresponding path program 13 times [2023-08-27 14:21:35,543 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 14:21:35,543 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1726948032] [2023-08-27 14:21:35,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 14:21:35,543 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 14:21:35,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 14:21:35,837 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 21 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 14:21:35,837 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 14:21:35,837 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1726948032] [2023-08-27 14:21:35,838 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1726948032] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 14:21:35,838 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [289910335] [2023-08-27 14:21:35,838 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-27 14:21:35,838 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 14:21:35,838 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 14:21:35,841 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 14:21:35,867 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 14:21:36,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 14:21:36,046 INFO L262 TraceCheckSpWp]: Trace formula consists of 361 conjuncts, 20 conjunts are in the unsatisfiable core [2023-08-27 14:21:36,047 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 14:21:36,313 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 28 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 14:21:36,314 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 14:21:36,545 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 28 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 14:21:36,545 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [289910335] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 14:21:36,545 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 14:21:36,545 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 42 [2023-08-27 14:21:36,546 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [358574422] [2023-08-27 14:21:36,546 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 14:21:36,546 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2023-08-27 14:21:36,546 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 14:21:36,546 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2023-08-27 14:21:36,547 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=467, Invalid=1425, Unknown=0, NotChecked=0, Total=1892 [2023-08-27 14:21:36,549 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 134 out of 352 [2023-08-27 14:21:36,551 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 275 places, 317 transitions, 5414 flow. Second operand has 44 states, 44 states have (on average 135.1818181818182) internal successors, (5948), 44 states have internal predecessors, (5948), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:21:36,551 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 14:21:36,551 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 134 of 352 [2023-08-27 14:21:36,551 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 14:21:59,063 INFO L124 PetriNetUnfolderBase]: 111477/142577 cut-off events. [2023-08-27 14:21:59,064 INFO L125 PetriNetUnfolderBase]: For 1334614/1334614 co-relation queries the response was YES. [2023-08-27 14:22:01,306 INFO L83 FinitePrefix]: Finished finitePrefix Result has 735131 conditions, 142577 events. 111477/142577 cut-off events. For 1334614/1334614 co-relation queries the response was YES. Maximal size of possible extension queue 2274. Compared 741113 event pairs, 24254 based on Foata normal form. 3294/139343 useless extension candidates. Maximal degree in co-relation 735051. Up to 40678 conditions per place. [2023-08-27 14:22:01,832 INFO L140 encePairwiseOnDemand]: 345/352 looper letters, 341 selfloop transitions, 168 changer transitions 0/509 dead transitions. [2023-08-27 14:22:01,833 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 278 places, 509 transitions, 6827 flow [2023-08-27 14:22:01,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-08-27 14:22:01,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2023-08-27 14:22:01,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 2764 transitions. [2023-08-27 14:22:01,835 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41327751196172247 [2023-08-27 14:22:01,835 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 2764 transitions. [2023-08-27 14:22:01,835 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 2764 transitions. [2023-08-27 14:22:01,836 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 14:22:01,836 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 2764 transitions. [2023-08-27 14:22:01,838 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 145.47368421052633) internal successors, (2764), 19 states have internal predecessors, (2764), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:22:01,841 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 352.0) internal successors, (7040), 20 states have internal predecessors, (7040), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:22:01,842 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 352.0) internal successors, (7040), 20 states have internal predecessors, (7040), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:22:01,842 INFO L175 Difference]: Start difference. First operand has 275 places, 317 transitions, 5414 flow. Second operand 19 states and 2764 transitions. [2023-08-27 14:22:01,842 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 278 places, 509 transitions, 6827 flow [2023-08-27 14:23:17,203 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 253 places, 509 transitions, 6318 flow, removed 129 selfloop flow, removed 25 redundant places. [2023-08-27 14:23:17,209 INFO L231 Difference]: Finished difference. Result has 262 places, 291 transitions, 5147 flow [2023-08-27 14:23:17,210 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=352, PETRI_DIFFERENCE_MINUEND_FLOW=4228, PETRI_DIFFERENCE_MINUEND_PLACES=235, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=275, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=152, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=107, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=5147, PETRI_PLACES=262, PETRI_TRANSITIONS=291} [2023-08-27 14:23:17,210 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 210 predicate places. [2023-08-27 14:23:17,210 INFO L495 AbstractCegarLoop]: Abstraction has has 262 places, 291 transitions, 5147 flow [2023-08-27 14:23:17,211 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 135.1818181818182) internal successors, (5948), 44 states have internal predecessors, (5948), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:23:17,211 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 14:23:17,211 INFO L208 CegarLoopForPetriNet]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 14:23:17,216 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 14:23:17,411 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 14:23:17,412 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting thread3Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 24 more)] === [2023-08-27 14:23:17,412 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 14:23:17,412 INFO L85 PathProgramCache]: Analyzing trace with hash -121116106, now seen corresponding path program 14 times [2023-08-27 14:23:17,412 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 14:23:17,412 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1340459982] [2023-08-27 14:23:17,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 14:23:17,412 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 14:23:17,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 14:23:18,436 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 14:23:18,436 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 14:23:18,436 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1340459982] [2023-08-27 14:23:18,436 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1340459982] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 14:23:18,436 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1199430885] [2023-08-27 14:23:18,436 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-27 14:23:18,437 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 14:23:18,437 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 14:23:18,437 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 14:23:18,439 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 14:23:18,645 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-27 14:23:18,645 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 14:23:18,647 INFO L262 TraceCheckSpWp]: Trace formula consists of 372 conjuncts, 70 conjunts are in the unsatisfiable core [2023-08-27 14:23:18,649 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 14:23:18,947 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-08-27 14:23:19,005 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-27 14:23:19,006 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 16 treesize of output 18 [2023-08-27 14:23:19,055 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-27 14:23:19,056 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 16 treesize of output 18 [2023-08-27 14:23:19,093 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-27 14:23:19,094 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 16 treesize of output 18 [2023-08-27 14:23:19,108 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 20 [2023-08-27 14:23:19,147 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 20 [2023-08-27 14:23:19,182 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 20 [2023-08-27 14:23:19,220 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 20 [2023-08-27 14:23:19,257 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 20 [2023-08-27 14:23:19,295 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 20 [2023-08-27 14:23:19,331 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 20 [2023-08-27 14:23:19,365 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 14:23:19,366 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 14:23:25,922 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 14:23:25,922 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 32 treesize of output 33 [2023-08-27 14:23:25,931 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 14:23:25,931 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 311 treesize of output 299 [2023-08-27 14:23:25,937 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 138 treesize of output 122 [2023-08-27 14:23:25,944 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 59 treesize of output 55 [2023-08-27 14:23:25,950 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 62 treesize of output 54 [2023-08-27 14:23:26,463 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 14:23:26,463 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1199430885] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 14:23:26,463 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 14:23:26,463 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20, 20] total 58 [2023-08-27 14:23:26,463 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [426167142] [2023-08-27 14:23:26,463 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 14:23:26,464 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 60 states [2023-08-27 14:23:26,464 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 14:23:26,464 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2023-08-27 14:23:26,465 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=202, Invalid=3309, Unknown=29, NotChecked=0, Total=3540 [2023-08-27 14:23:26,467 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 122 out of 352 [2023-08-27 14:23:26,470 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 262 places, 291 transitions, 5147 flow. Second operand has 60 states, 60 states have (on average 123.16666666666667) internal successors, (7390), 60 states have internal predecessors, (7390), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:23:26,470 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 14:23:26,470 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 122 of 352 [2023-08-27 14:23:26,470 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand