/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-VariableLbe.epf --traceabstraction.order.of.the.error.locations.to.be.checked INSUFFICIENT_FIRST -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --cacsl2boogietranslator.check.absence.of.signed.integer.overflows true -i ../../../trunk/examples/svcomp/weaver/popl20-difference-det.wvr.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-ac9dbd0-m [2023-08-27 07:31:40,045 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-08-27 07:31:40,098 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 07:31:40,105 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-08-27 07:31:40,106 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Checked method. Library mode if empty. [2023-08-27 07:31:40,144 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-27 07:31:40,145 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-27 07:31:40,146 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-27 07:31:40,146 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-27 07:31:40,146 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-08-27 07:31:40,147 INFO L153 SettingsManager]: * Use SBE=true [2023-08-27 07:31:40,147 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-27 07:31:40,147 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-27 07:31:40,148 INFO L153 SettingsManager]: * sizeof long=4 [2023-08-27 07:31:40,148 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-27 07:31:40,148 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-08-27 07:31:40,149 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-08-27 07:31:40,152 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-27 07:31:40,152 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-27 07:31:40,152 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-27 07:31:40,156 INFO L153 SettingsManager]: * sizeof long double=12 [2023-08-27 07:31:40,157 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-08-27 07:31:40,157 INFO L153 SettingsManager]: * Use constant arrays=true [2023-08-27 07:31:40,158 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-27 07:31:40,159 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-27 07:31:40,159 INFO L153 SettingsManager]: * To the following directory=./dump/ [2023-08-27 07:31:40,159 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-27 07:31:40,159 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-27 07:31:40,160 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-27 07:31:40,160 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-27 07:31:40,161 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-27 07:31:40,161 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-27 07:31:40,161 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-27 07:31:40,161 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-27 07:31:40,162 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-27 07:31:40,162 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Order of the error locations to be checked -> INSUFFICIENT_FIRST Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check absence of signed integer overflows -> true [2023-08-27 07:31:40,505 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-27 07:31:40,530 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-27 07:31:40,532 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-27 07:31:40,533 INFO L270 PluginConnector]: Initializing CDTParser... [2023-08-27 07:31:40,533 INFO L274 PluginConnector]: CDTParser initialized [2023-08-27 07:31:40,534 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/popl20-difference-det.wvr.c [2023-08-27 07:31:41,734 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-08-27 07:31:41,911 INFO L384 CDTParser]: Found 1 translation units. [2023-08-27 07:31:41,912 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-difference-det.wvr.c [2023-08-27 07:31:41,918 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/deebb5b8b/41a8ad363db14a56b9eb8115756f1790/FLAGdfb936590 [2023-08-27 07:31:41,928 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/deebb5b8b/41a8ad363db14a56b9eb8115756f1790 [2023-08-27 07:31:41,930 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-27 07:31:41,931 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-08-27 07:31:41,932 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-27 07:31:41,933 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-27 07:31:41,935 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-27 07:31:41,935 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.08 07:31:41" (1/1) ... [2023-08-27 07:31:41,936 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@73c4bb7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 07:31:41, skipping insertion in model container [2023-08-27 07:31:41,936 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.08 07:31:41" (1/1) ... [2023-08-27 07:31:41,958 INFO L176 MainTranslator]: Built tables and reachable declarations [2023-08-27 07:31:42,142 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-27 07:31:42,152 INFO L201 MainTranslator]: Completed pre-run [2023-08-27 07:31:42,189 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-27 07:31:42,195 WARN L669 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-08-27 07:31:42,195 WARN L669 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-08-27 07:31:42,202 INFO L206 MainTranslator]: Completed translation [2023-08-27 07:31:42,204 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 07:31:42 WrapperNode [2023-08-27 07:31:42,204 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-27 07:31:42,205 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-27 07:31:42,205 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-27 07:31:42,205 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-27 07:31:42,211 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 07:31:42" (1/1) ... [2023-08-27 07:31:42,227 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 07:31:42" (1/1) ... [2023-08-27 07:31:42,256 INFO L138 Inliner]: procedures = 23, calls = 42, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 134 [2023-08-27 07:31:42,257 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-27 07:31:42,258 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-27 07:31:42,259 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-27 07:31:42,259 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-08-27 07:31:42,266 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 07:31:42" (1/1) ... [2023-08-27 07:31:42,266 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 07:31:42" (1/1) ... [2023-08-27 07:31:42,280 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 07:31:42" (1/1) ... [2023-08-27 07:31:42,281 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 07:31:42" (1/1) ... [2023-08-27 07:31:42,285 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 07:31:42" (1/1) ... [2023-08-27 07:31:42,287 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 07:31:42" (1/1) ... [2023-08-27 07:31:42,289 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 07:31:42" (1/1) ... [2023-08-27 07:31:42,290 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 07:31:42" (1/1) ... [2023-08-27 07:31:42,292 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-27 07:31:42,292 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-27 07:31:42,303 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-08-27 07:31:42,303 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-08-27 07:31:42,304 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 07:31:42" (1/1) ... [2023-08-27 07:31:42,309 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-27 07:31:42,318 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 07:31:42,335 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 07:31:42,359 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 07:31:42,376 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-27 07:31:42,376 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-08-27 07:31:42,376 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-08-27 07:31:42,377 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-08-27 07:31:42,377 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-08-27 07:31:42,377 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2023-08-27 07:31:42,377 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2023-08-27 07:31:42,377 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2023-08-27 07:31:42,378 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2023-08-27 07:31:42,378 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-27 07:31:42,378 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-27 07:31:42,378 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-27 07:31:42,378 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-08-27 07:31:42,378 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-08-27 07:31:42,378 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-27 07:31:42,378 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-27 07:31:42,379 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-27 07:31:42,379 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-27 07:31:42,381 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 07:31:42,496 INFO L236 CfgBuilder]: Building ICFG [2023-08-27 07:31:42,498 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-27 07:31:42,710 INFO L277 CfgBuilder]: Performing block encoding [2023-08-27 07:31:42,779 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-27 07:31:42,780 INFO L302 CfgBuilder]: Removed 4 assume(true) statements. [2023-08-27 07:31:42,782 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.08 07:31:42 BoogieIcfgContainer [2023-08-27 07:31:42,782 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-27 07:31:42,784 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-27 07:31:42,784 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-08-27 07:31:42,787 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-08-27 07:31:42,788 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.08 07:31:41" (1/3) ... [2023-08-27 07:31:42,788 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@65491c0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.08 07:31:42, skipping insertion in model container [2023-08-27 07:31:42,789 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 07:31:42" (2/3) ... [2023-08-27 07:31:42,789 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@65491c0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.08 07:31:42, skipping insertion in model container [2023-08-27 07:31:42,789 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.08 07:31:42" (3/3) ... [2023-08-27 07:31:42,790 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-difference-det.wvr.c [2023-08-27 07:31:42,809 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-27 07:31:42,810 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 17 error locations. [2023-08-27 07:31:42,810 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-27 07:31:42,905 INFO L144 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2023-08-27 07:31:42,953 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 158 places, 154 transitions, 340 flow [2023-08-27 07:31:43,038 INFO L124 PetriNetUnfolderBase]: 9/150 cut-off events. [2023-08-27 07:31:43,039 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2023-08-27 07:31:43,051 INFO L83 FinitePrefix]: Finished finitePrefix Result has 167 conditions, 150 events. 9/150 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 222 event pairs, 0 based on Foata normal form. 0/124 useless extension candidates. Maximal degree in co-relation 103. Up to 2 conditions per place. [2023-08-27 07:31:43,051 INFO L82 GeneralOperation]: Start removeDead. Operand has 158 places, 154 transitions, 340 flow [2023-08-27 07:31:43,059 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 141 places, 137 transitions, 298 flow [2023-08-27 07:31:43,062 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-27 07:31:43,074 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 141 places, 137 transitions, 298 flow [2023-08-27 07:31:43,077 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 141 places, 137 transitions, 298 flow [2023-08-27 07:31:43,078 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 141 places, 137 transitions, 298 flow [2023-08-27 07:31:43,139 INFO L124 PetriNetUnfolderBase]: 9/137 cut-off events. [2023-08-27 07:31:43,139 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2023-08-27 07:31:43,141 INFO L83 FinitePrefix]: Finished finitePrefix Result has 154 conditions, 137 events. 9/137 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 221 event pairs, 0 based on Foata normal form. 0/112 useless extension candidates. Maximal degree in co-relation 103. Up to 2 conditions per place. [2023-08-27 07:31:43,145 INFO L119 LiptonReduction]: Number of co-enabled transitions 5712 [2023-08-27 07:31:47,437 INFO L134 LiptonReduction]: Checked pairs total: 6533 [2023-08-27 07:31:47,437 INFO L136 LiptonReduction]: Total number of compositions: 122 [2023-08-27 07:31:47,449 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-27 07:31:47,454 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;@8adb473, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-27 07:31:47,455 INFO L358 AbstractCegarLoop]: Starting to check reachability of 37 error locations. [2023-08-27 07:31:47,457 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-27 07:31:47,457 INFO L124 PetriNetUnfolderBase]: 1/6 cut-off events. [2023-08-27 07:31:47,457 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-27 07:31:47,457 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 07:31:47,458 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-08-27 07:31:47,458 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 34 more)] === [2023-08-27 07:31:47,462 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 07:31:47,463 INFO L85 PathProgramCache]: Analyzing trace with hash 19847562, now seen corresponding path program 1 times [2023-08-27 07:31:47,483 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 07:31:47,484 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1736921341] [2023-08-27 07:31:47,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 07:31:47,484 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 07:31:47,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 07:31:47,724 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 07:31:47,725 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 07:31:47,725 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1736921341] [2023-08-27 07:31:47,726 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1736921341] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-27 07:31:47,726 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-27 07:31:47,726 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-27 07:31:47,727 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1883612838] [2023-08-27 07:31:47,728 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-27 07:31:47,735 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-27 07:31:47,739 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 07:31:47,767 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-27 07:31:47,768 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-27 07:31:47,771 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 126 out of 276 [2023-08-27 07:31:47,775 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 45 transitions, 114 flow. Second operand has 3 states, 3 states have (on average 127.0) internal successors, (381), 3 states have internal predecessors, (381), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:31:47,776 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 07:31:47,776 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 126 of 276 [2023-08-27 07:31:47,777 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 07:31:49,893 INFO L124 PetriNetUnfolderBase]: 24773/29661 cut-off events. [2023-08-27 07:31:49,893 INFO L125 PetriNetUnfolderBase]: For 1096/1096 co-relation queries the response was YES. [2023-08-27 07:31:49,953 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60385 conditions, 29661 events. 24773/29661 cut-off events. For 1096/1096 co-relation queries the response was YES. Maximal size of possible extension queue 1993. Compared 127324 event pairs, 3059 based on Foata normal form. 0/8331 useless extension candidates. Maximal degree in co-relation 55402. Up to 26809 conditions per place. [2023-08-27 07:31:50,163 INFO L140 encePairwiseOnDemand]: 264/276 looper letters, 66 selfloop transitions, 4 changer transitions 0/74 dead transitions. [2023-08-27 07:31:50,163 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 74 transitions, 333 flow [2023-08-27 07:31:50,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-27 07:31:50,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-27 07:31:50,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 458 transitions. [2023-08-27 07:31:50,176 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5531400966183575 [2023-08-27 07:31:50,177 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 458 transitions. [2023-08-27 07:31:50,177 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 458 transitions. [2023-08-27 07:31:50,179 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 07:31:50,181 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 458 transitions. [2023-08-27 07:31:50,185 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 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 07:31:50,189 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 276.0) internal successors, (1104), 4 states have internal predecessors, (1104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:31:50,190 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 276.0) internal successors, (1104), 4 states have internal predecessors, (1104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:31:50,191 INFO L175 Difference]: Start difference. First operand has 54 places, 45 transitions, 114 flow. Second operand 3 states and 458 transitions. [2023-08-27 07:31:50,192 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 74 transitions, 333 flow [2023-08-27 07:31:50,215 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 74 transitions, 303 flow, removed 0 selfloop flow, removed 8 redundant places. [2023-08-27 07:31:50,217 INFO L231 Difference]: Finished difference. Result has 47 places, 46 transitions, 130 flow [2023-08-27 07:31:50,219 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=276, PETRI_DIFFERENCE_MINUEND_FLOW=94, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=130, PETRI_PLACES=47, PETRI_TRANSITIONS=46} [2023-08-27 07:31:50,222 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, -7 predicate places. [2023-08-27 07:31:50,222 INFO L495 AbstractCegarLoop]: Abstraction has has 47 places, 46 transitions, 130 flow [2023-08-27 07:31:50,223 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 127.0) internal successors, (381), 3 states have internal predecessors, (381), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:31:50,223 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 07:31:50,223 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-08-27 07:31:50,223 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-27 07:31:50,223 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 34 more)] === [2023-08-27 07:31:50,224 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 07:31:50,224 INFO L85 PathProgramCache]: Analyzing trace with hash 19847635, now seen corresponding path program 1 times [2023-08-27 07:31:50,224 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 07:31:50,224 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [666577986] [2023-08-27 07:31:50,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 07:31:50,224 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 07:31:50,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 07:31:50,274 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 07:31:50,275 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 07:31:50,275 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [666577986] [2023-08-27 07:31:50,275 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [666577986] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-27 07:31:50,275 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-27 07:31:50,275 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-27 07:31:50,275 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [845831129] [2023-08-27 07:31:50,276 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-27 07:31:50,277 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-27 07:31:50,277 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 07:31:50,277 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-27 07:31:50,278 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-27 07:31:50,278 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 122 out of 276 [2023-08-27 07:31:50,279 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 46 transitions, 130 flow. Second operand has 3 states, 3 states have (on average 123.33333333333333) internal successors, (370), 3 states have internal predecessors, (370), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:31:50,279 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 07:31:50,279 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 122 of 276 [2023-08-27 07:31:50,279 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 07:31:52,066 INFO L124 PetriNetUnfolderBase]: 22636/27725 cut-off events. [2023-08-27 07:31:52,066 INFO L125 PetriNetUnfolderBase]: For 1875/1903 co-relation queries the response was YES. [2023-08-27 07:31:52,089 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63766 conditions, 27725 events. 22636/27725 cut-off events. For 1875/1903 co-relation queries the response was YES. Maximal size of possible extension queue 1969. Compared 132033 event pairs, 8316 based on Foata normal form. 0/10138 useless extension candidates. Maximal degree in co-relation 13541. Up to 26389 conditions per place. [2023-08-27 07:31:52,207 INFO L140 encePairwiseOnDemand]: 271/276 looper letters, 58 selfloop transitions, 3 changer transitions 0/64 dead transitions. [2023-08-27 07:31:52,207 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 64 transitions, 285 flow [2023-08-27 07:31:52,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-27 07:31:52,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-27 07:31:52,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 429 transitions. [2023-08-27 07:31:52,210 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5181159420289855 [2023-08-27 07:31:52,210 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 429 transitions. [2023-08-27 07:31:52,210 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 429 transitions. [2023-08-27 07:31:52,211 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 07:31:52,211 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 429 transitions. [2023-08-27 07:31:52,212 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 143.0) internal successors, (429), 3 states have internal predecessors, (429), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:31:52,214 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 276.0) internal successors, (1104), 4 states have internal predecessors, (1104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:31:52,214 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 276.0) internal successors, (1104), 4 states have internal predecessors, (1104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:31:52,215 INFO L175 Difference]: Start difference. First operand has 47 places, 46 transitions, 130 flow. Second operand 3 states and 429 transitions. [2023-08-27 07:31:52,215 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 64 transitions, 285 flow [2023-08-27 07:31:52,220 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 64 transitions, 283 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-27 07:31:52,221 INFO L231 Difference]: Finished difference. Result has 49 places, 45 transitions, 131 flow [2023-08-27 07:31:52,221 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=276, PETRI_DIFFERENCE_MINUEND_FLOW=118, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=131, PETRI_PLACES=49, PETRI_TRANSITIONS=45} [2023-08-27 07:31:52,222 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, -5 predicate places. [2023-08-27 07:31:52,222 INFO L495 AbstractCegarLoop]: Abstraction has has 49 places, 45 transitions, 131 flow [2023-08-27 07:31:52,222 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 123.33333333333333) internal successors, (370), 3 states have internal predecessors, (370), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:31:52,222 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 07:31:52,223 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-27 07:31:52,223 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-27 07:31:52,223 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 34 more)] === [2023-08-27 07:31:52,223 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 07:31:52,223 INFO L85 PathProgramCache]: Analyzing trace with hash 615277717, now seen corresponding path program 1 times [2023-08-27 07:31:52,224 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 07:31:52,224 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [651491702] [2023-08-27 07:31:52,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 07:31:52,224 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 07:31:52,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 07:31:52,279 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 07:31:52,280 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 07:31:52,280 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [651491702] [2023-08-27 07:31:52,280 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [651491702] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 07:31:52,280 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [805338377] [2023-08-27 07:31:52,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 07:31:52,280 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 07:31:52,281 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 07:31:52,285 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 07:31:52,325 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 07:31:52,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 07:31:52,429 INFO L262 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-27 07:31:52,433 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 07:31:52,470 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 07:31:52,470 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 07:31:52,488 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 07:31:52,489 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [805338377] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 07:31:52,489 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 07:31:52,489 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2023-08-27 07:31:52,489 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [517029837] [2023-08-27 07:31:52,490 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 07:31:52,490 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-27 07:31:52,490 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 07:31:52,490 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-27 07:31:52,491 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-08-27 07:31:52,492 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 122 out of 276 [2023-08-27 07:31:52,493 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 45 transitions, 131 flow. Second operand has 7 states, 7 states have (on average 123.42857142857143) internal successors, (864), 7 states have internal predecessors, (864), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:31:52,493 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 07:31:52,493 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 122 of 276 [2023-08-27 07:31:52,493 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 07:31:55,972 INFO L124 PetriNetUnfolderBase]: 55489/65996 cut-off events. [2023-08-27 07:31:55,973 INFO L125 PetriNetUnfolderBase]: For 3179/3179 co-relation queries the response was YES. [2023-08-27 07:31:56,050 INFO L83 FinitePrefix]: Finished finitePrefix Result has 158439 conditions, 65996 events. 55489/65996 cut-off events. For 3179/3179 co-relation queries the response was YES. Maximal size of possible extension queue 4051. Compared 308144 event pairs, 9357 based on Foata normal form. 0/23674 useless extension candidates. Maximal degree in co-relation 19760. Up to 25362 conditions per place. [2023-08-27 07:31:56,320 INFO L140 encePairwiseOnDemand]: 271/276 looper letters, 155 selfloop transitions, 13 changer transitions 0/171 dead transitions. [2023-08-27 07:31:56,320 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 171 transitions, 796 flow [2023-08-27 07:31:56,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-27 07:31:56,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-27 07:31:56,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1025 transitions. [2023-08-27 07:31:56,324 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5305383022774327 [2023-08-27 07:31:56,324 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1025 transitions. [2023-08-27 07:31:56,324 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1025 transitions. [2023-08-27 07:31:56,324 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 07:31:56,324 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1025 transitions. [2023-08-27 07:31:56,327 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 146.42857142857142) internal successors, (1025), 7 states have internal predecessors, (1025), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:31:56,330 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 276.0) internal successors, (2208), 8 states have internal predecessors, (2208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:31:56,331 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 276.0) internal successors, (2208), 8 states have internal predecessors, (2208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:31:56,331 INFO L175 Difference]: Start difference. First operand has 49 places, 45 transitions, 131 flow. Second operand 7 states and 1025 transitions. [2023-08-27 07:31:56,331 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 171 transitions, 796 flow [2023-08-27 07:31:56,344 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 171 transitions, 789 flow, removed 1 selfloop flow, removed 2 redundant places. [2023-08-27 07:31:56,346 INFO L231 Difference]: Finished difference. Result has 56 places, 54 transitions, 208 flow [2023-08-27 07:31:56,346 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=276, PETRI_DIFFERENCE_MINUEND_FLOW=124, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=208, PETRI_PLACES=56, PETRI_TRANSITIONS=54} [2023-08-27 07:31:56,346 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 2 predicate places. [2023-08-27 07:31:56,347 INFO L495 AbstractCegarLoop]: Abstraction has has 56 places, 54 transitions, 208 flow [2023-08-27 07:31:56,347 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 123.42857142857143) internal successors, (864), 7 states have internal predecessors, (864), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:31:56,347 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 07:31:56,348 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2023-08-27 07:31:56,357 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 07:31:56,553 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 07:31:56,553 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 34 more)] === [2023-08-27 07:31:56,554 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 07:31:56,554 INFO L85 PathProgramCache]: Analyzing trace with hash 1893741064, now seen corresponding path program 1 times [2023-08-27 07:31:56,554 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 07:31:56,554 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [171587864] [2023-08-27 07:31:56,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 07:31:56,554 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 07:31:56,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 07:31:56,623 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 07:31:56,623 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 07:31:56,624 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [171587864] [2023-08-27 07:31:56,624 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [171587864] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 07:31:56,624 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [593214724] [2023-08-27 07:31:56,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 07:31:56,624 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 07:31:56,624 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 07:31:56,625 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 07:31:56,628 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 07:31:56,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 07:31:56,689 INFO L262 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 5 conjunts are in the unsatisfiable core [2023-08-27 07:31:56,689 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 07:31:56,703 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 07:31:56,703 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-27 07:31:56,703 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [593214724] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-27 07:31:56,703 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-27 07:31:56,703 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 5 [2023-08-27 07:31:56,704 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [488346951] [2023-08-27 07:31:56,704 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-27 07:31:56,704 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-27 07:31:56,704 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 07:31:56,705 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-27 07:31:56,705 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-08-27 07:31:56,705 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 122 out of 276 [2023-08-27 07:31:56,706 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 54 transitions, 208 flow. Second operand has 5 states, 5 states have (on average 123.2) internal successors, (616), 5 states have internal predecessors, (616), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:31:56,706 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 07:31:56,706 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 122 of 276 [2023-08-27 07:31:56,706 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 07:31:59,857 INFO L124 PetriNetUnfolderBase]: 52238/62143 cut-off events. [2023-08-27 07:31:59,858 INFO L125 PetriNetUnfolderBase]: For 5675/5675 co-relation queries the response was YES. [2023-08-27 07:31:59,962 INFO L83 FinitePrefix]: Finished finitePrefix Result has 158401 conditions, 62143 events. 52238/62143 cut-off events. For 5675/5675 co-relation queries the response was YES. Maximal size of possible extension queue 3546. Compared 292760 event pairs, 1706 based on Foata normal form. 1204/27410 useless extension candidates. Maximal degree in co-relation 82996. Up to 38602 conditions per place. [2023-08-27 07:32:00,209 INFO L140 encePairwiseOnDemand]: 272/276 looper letters, 106 selfloop transitions, 8 changer transitions 0/117 dead transitions. [2023-08-27 07:32:00,209 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 117 transitions, 572 flow [2023-08-27 07:32:00,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-27 07:32:00,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-27 07:32:00,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 722 transitions. [2023-08-27 07:32:00,212 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5231884057971015 [2023-08-27 07:32:00,212 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 722 transitions. [2023-08-27 07:32:00,212 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 722 transitions. [2023-08-27 07:32:00,213 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 07:32:00,213 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 722 transitions. [2023-08-27 07:32:00,215 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 144.4) internal successors, (722), 5 states have internal predecessors, (722), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:32:00,217 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 276.0) internal successors, (1656), 6 states have internal predecessors, (1656), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:32:00,218 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 276.0) internal successors, (1656), 6 states have internal predecessors, (1656), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:32:00,218 INFO L175 Difference]: Start difference. First operand has 56 places, 54 transitions, 208 flow. Second operand 5 states and 722 transitions. [2023-08-27 07:32:00,218 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 117 transitions, 572 flow [2023-08-27 07:32:00,465 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 117 transitions, 558 flow, removed 4 selfloop flow, removed 2 redundant places. [2023-08-27 07:32:00,466 INFO L231 Difference]: Finished difference. Result has 56 places, 50 transitions, 183 flow [2023-08-27 07:32:00,466 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=276, PETRI_DIFFERENCE_MINUEND_FLOW=167, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=183, PETRI_PLACES=56, PETRI_TRANSITIONS=50} [2023-08-27 07:32:00,467 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 2 predicate places. [2023-08-27 07:32:00,467 INFO L495 AbstractCegarLoop]: Abstraction has has 56 places, 50 transitions, 183 flow [2023-08-27 07:32:00,468 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 123.2) internal successors, (616), 5 states have internal predecessors, (616), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:32:00,468 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 07:32:00,468 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-27 07:32:00,477 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-08-27 07:32:00,673 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2023-08-27 07:32:00,674 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 34 more)] === [2023-08-27 07:32:00,674 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 07:32:00,674 INFO L85 PathProgramCache]: Analyzing trace with hash 615277643, now seen corresponding path program 1 times [2023-08-27 07:32:00,674 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 07:32:00,674 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [739838864] [2023-08-27 07:32:00,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 07:32:00,674 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 07:32:00,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 07:32:00,748 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 07:32:00,748 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 07:32:00,749 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [739838864] [2023-08-27 07:32:00,749 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [739838864] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 07:32:00,749 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2105127871] [2023-08-27 07:32:00,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 07:32:00,749 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 07:32:00,750 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 07:32:00,751 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 07:32:00,753 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 07:32:00,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 07:32:00,817 INFO L262 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-27 07:32:00,821 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 07:32:00,832 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 07:32:00,833 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-27 07:32:00,837 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2105127871] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-27 07:32:00,837 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-27 07:32:00,837 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [2] total 3 [2023-08-27 07:32:00,837 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [775495872] [2023-08-27 07:32:00,837 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-27 07:32:00,838 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-27 07:32:00,838 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 07:32:00,838 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-27 07:32:00,838 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-08-27 07:32:00,839 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 126 out of 276 [2023-08-27 07:32:00,841 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 50 transitions, 183 flow. Second operand has 4 states, 4 states have (on average 127.0) internal successors, (508), 4 states have internal predecessors, (508), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:32:00,841 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 07:32:00,841 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 126 of 276 [2023-08-27 07:32:00,841 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 07:32:04,100 INFO L124 PetriNetUnfolderBase]: 56638/68068 cut-off events. [2023-08-27 07:32:04,100 INFO L125 PetriNetUnfolderBase]: For 24805/24805 co-relation queries the response was YES. [2023-08-27 07:32:04,208 INFO L83 FinitePrefix]: Finished finitePrefix Result has 177355 conditions, 68068 events. 56638/68068 cut-off events. For 24805/24805 co-relation queries the response was YES. Maximal size of possible extension queue 4066. Compared 332321 event pairs, 11001 based on Foata normal form. 0/31373 useless extension candidates. Maximal degree in co-relation 88112. Up to 39065 conditions per place. [2023-08-27 07:32:04,439 INFO L140 encePairwiseOnDemand]: 267/276 looper letters, 74 selfloop transitions, 12 changer transitions 0/90 dead transitions. [2023-08-27 07:32:04,440 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 90 transitions, 500 flow [2023-08-27 07:32:04,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-27 07:32:04,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-27 07:32:04,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 578 transitions. [2023-08-27 07:32:04,441 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5235507246376812 [2023-08-27 07:32:04,441 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 578 transitions. [2023-08-27 07:32:04,441 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 578 transitions. [2023-08-27 07:32:04,442 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 07:32:04,442 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 578 transitions. [2023-08-27 07:32:04,443 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 144.5) internal successors, (578), 4 states have internal predecessors, (578), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:32:04,445 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 276.0) internal successors, (1380), 5 states have internal predecessors, (1380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:32:04,445 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 276.0) internal successors, (1380), 5 states have internal predecessors, (1380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:32:04,445 INFO L175 Difference]: Start difference. First operand has 56 places, 50 transitions, 183 flow. Second operand 4 states and 578 transitions. [2023-08-27 07:32:04,445 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 90 transitions, 500 flow [2023-08-27 07:32:04,626 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 90 transitions, 482 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-08-27 07:32:04,628 INFO L231 Difference]: Finished difference. Result has 57 places, 59 transitions, 294 flow [2023-08-27 07:32:04,628 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=276, PETRI_DIFFERENCE_MINUEND_FLOW=167, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=294, PETRI_PLACES=57, PETRI_TRANSITIONS=59} [2023-08-27 07:32:04,628 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 3 predicate places. [2023-08-27 07:32:04,629 INFO L495 AbstractCegarLoop]: Abstraction has has 57 places, 59 transitions, 294 flow [2023-08-27 07:32:04,629 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 127.0) internal successors, (508), 4 states have internal predecessors, (508), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:32:04,629 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 07:32:04,629 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-27 07:32:04,634 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 07:32:04,832 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 07:32:04,833 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 34 more)] === [2023-08-27 07:32:04,833 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 07:32:04,833 INFO L85 PathProgramCache]: Analyzing trace with hash 615277644, now seen corresponding path program 1 times [2023-08-27 07:32:04,834 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 07:32:04,834 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1686532150] [2023-08-27 07:32:04,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 07:32:04,834 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 07:32:04,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 07:32:04,903 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 07:32:04,903 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 07:32:04,903 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1686532150] [2023-08-27 07:32:04,903 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1686532150] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 07:32:04,903 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [248043415] [2023-08-27 07:32:04,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 07:32:04,904 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 07:32:04,904 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 07:32:04,905 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 07:32:04,907 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 07:32:04,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 07:32:04,966 INFO L262 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-27 07:32:04,967 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 07:32:04,976 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 07:32:04,977 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 07:32:04,991 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 07:32:04,991 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [248043415] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 07:32:04,991 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 07:32:04,991 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 5 [2023-08-27 07:32:04,992 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1208030242] [2023-08-27 07:32:04,992 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 07:32:04,992 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-27 07:32:04,992 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 07:32:04,992 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-27 07:32:04,993 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-08-27 07:32:04,993 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 126 out of 276 [2023-08-27 07:32:04,994 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 59 transitions, 294 flow. Second operand has 7 states, 7 states have (on average 127.57142857142857) internal successors, (893), 7 states have internal predecessors, (893), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:32:04,994 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 07:32:04,994 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 126 of 276 [2023-08-27 07:32:04,995 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 07:32:10,953 INFO L124 PetriNetUnfolderBase]: 89795/108347 cut-off events. [2023-08-27 07:32:10,953 INFO L125 PetriNetUnfolderBase]: For 70341/70341 co-relation queries the response was YES. [2023-08-27 07:32:11,137 INFO L83 FinitePrefix]: Finished finitePrefix Result has 317506 conditions, 108347 events. 89795/108347 cut-off events. For 70341/70341 co-relation queries the response was YES. Maximal size of possible extension queue 5852. Compared 553984 event pairs, 8873 based on Foata normal form. 10399/62884 useless extension candidates. Maximal degree in co-relation 77568. Up to 31703 conditions per place. [2023-08-27 07:32:11,487 INFO L140 encePairwiseOnDemand]: 268/276 looper letters, 171 selfloop transitions, 29 changer transitions 0/204 dead transitions. [2023-08-27 07:32:11,488 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 204 transitions, 1242 flow [2023-08-27 07:32:11,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-27 07:32:11,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-27 07:32:11,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 933 transitions. [2023-08-27 07:32:11,491 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5634057971014492 [2023-08-27 07:32:11,491 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 933 transitions. [2023-08-27 07:32:11,491 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 933 transitions. [2023-08-27 07:32:11,492 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 07:32:11,492 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 933 transitions. [2023-08-27 07:32:11,494 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 155.5) internal successors, (933), 6 states have internal predecessors, (933), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:32:11,496 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 276.0) internal successors, (1932), 7 states have internal predecessors, (1932), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:32:11,497 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 276.0) internal successors, (1932), 7 states have internal predecessors, (1932), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:32:11,497 INFO L175 Difference]: Start difference. First operand has 57 places, 59 transitions, 294 flow. Second operand 6 states and 933 transitions. [2023-08-27 07:32:11,497 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 204 transitions, 1242 flow [2023-08-27 07:32:11,708 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 204 transitions, 1163 flow, removed 39 selfloop flow, removed 1 redundant places. [2023-08-27 07:32:11,710 INFO L231 Difference]: Finished difference. Result has 65 places, 80 transitions, 586 flow [2023-08-27 07:32:11,710 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=276, PETRI_DIFFERENCE_MINUEND_FLOW=261, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=586, PETRI_PLACES=65, PETRI_TRANSITIONS=80} [2023-08-27 07:32:11,711 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 11 predicate places. [2023-08-27 07:32:11,711 INFO L495 AbstractCegarLoop]: Abstraction has has 65 places, 80 transitions, 586 flow [2023-08-27 07:32:11,712 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 127.57142857142857) internal successors, (893), 7 states have internal predecessors, (893), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:32:11,712 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 07:32:11,712 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 07:32:11,717 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-08-27 07:32:11,916 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 07:32:11,917 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting thread2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 34 more)] === [2023-08-27 07:32:11,917 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 07:32:11,917 INFO L85 PathProgramCache]: Analyzing trace with hash -552522556, now seen corresponding path program 1 times [2023-08-27 07:32:11,917 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 07:32:11,917 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [282965782] [2023-08-27 07:32:11,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 07:32:11,918 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 07:32:11,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 07:32:11,978 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 07:32:11,979 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 07:32:11,979 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [282965782] [2023-08-27 07:32:11,979 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [282965782] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-27 07:32:11,979 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-27 07:32:11,979 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-27 07:32:11,979 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1699979448] [2023-08-27 07:32:11,979 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-27 07:32:11,980 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-27 07:32:11,980 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 07:32:11,981 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-27 07:32:11,983 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-27 07:32:11,983 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 122 out of 276 [2023-08-27 07:32:11,983 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 80 transitions, 586 flow. Second operand has 3 states, 3 states have (on average 124.33333333333333) internal successors, (373), 3 states have internal predecessors, (373), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:32:11,984 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 07:32:11,984 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 122 of 276 [2023-08-27 07:32:11,986 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 07:32:18,320 INFO L124 PetriNetUnfolderBase]: 91989/112043 cut-off events. [2023-08-27 07:32:18,320 INFO L125 PetriNetUnfolderBase]: For 140164/140164 co-relation queries the response was YES. [2023-08-27 07:32:18,585 INFO L83 FinitePrefix]: Finished finitePrefix Result has 340869 conditions, 112043 events. 91989/112043 cut-off events. For 140164/140164 co-relation queries the response was YES. Maximal size of possible extension queue 6042. Compared 591906 event pairs, 16988 based on Foata normal form. 0/55671 useless extension candidates. Maximal degree in co-relation 164732. Up to 100116 conditions per place. [2023-08-27 07:32:19,010 INFO L140 encePairwiseOnDemand]: 271/276 looper letters, 107 selfloop transitions, 5 changer transitions 0/115 dead transitions. [2023-08-27 07:32:19,010 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 115 transitions, 988 flow [2023-08-27 07:32:19,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-27 07:32:19,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-27 07:32:19,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 431 transitions. [2023-08-27 07:32:19,012 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5205314009661836 [2023-08-27 07:32:19,012 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 431 transitions. [2023-08-27 07:32:19,012 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 431 transitions. [2023-08-27 07:32:19,012 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 07:32:19,012 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 431 transitions. [2023-08-27 07:32:19,013 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 143.66666666666666) internal successors, (431), 3 states have internal predecessors, (431), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:32:19,014 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 276.0) internal successors, (1104), 4 states have internal predecessors, (1104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:32:19,014 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 276.0) internal successors, (1104), 4 states have internal predecessors, (1104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:32:19,015 INFO L175 Difference]: Start difference. First operand has 65 places, 80 transitions, 586 flow. Second operand 3 states and 431 transitions. [2023-08-27 07:32:19,015 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 115 transitions, 988 flow [2023-08-27 07:32:26,539 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 115 transitions, 940 flow, removed 24 selfloop flow, removed 0 redundant places. [2023-08-27 07:32:26,540 INFO L231 Difference]: Finished difference. Result has 68 places, 84 transitions, 615 flow [2023-08-27 07:32:26,541 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=276, PETRI_DIFFERENCE_MINUEND_FLOW=548, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=80, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=75, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=615, PETRI_PLACES=68, PETRI_TRANSITIONS=84} [2023-08-27 07:32:26,541 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 14 predicate places. [2023-08-27 07:32:26,541 INFO L495 AbstractCegarLoop]: Abstraction has has 68 places, 84 transitions, 615 flow [2023-08-27 07:32:26,542 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 124.33333333333333) internal successors, (373), 3 states have internal predecessors, (373), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:32:26,542 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 07:32:26,542 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1] [2023-08-27 07:32:26,542 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-08-27 07:32:26,542 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 34 more)] === [2023-08-27 07:32:26,542 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 07:32:26,543 INFO L85 PathProgramCache]: Analyzing trace with hash -1180927405, now seen corresponding path program 2 times [2023-08-27 07:32:26,543 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 07:32:26,543 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [899943565] [2023-08-27 07:32:26,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 07:32:26,543 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 07:32:26,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 07:32:26,631 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 07:32:26,633 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 07:32:26,636 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [899943565] [2023-08-27 07:32:26,636 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [899943565] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 07:32:26,636 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [172363480] [2023-08-27 07:32:26,636 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-27 07:32:26,636 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 07:32:26,636 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 07:32:26,637 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 07:32:26,642 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 07:32:26,703 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-08-27 07:32:26,704 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 07:32:26,705 INFO L262 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-27 07:32:26,706 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 07:32:26,719 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 07:32:26,719 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-27 07:32:26,720 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [172363480] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-27 07:32:26,720 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-27 07:32:26,720 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [6] total 7 [2023-08-27 07:32:26,720 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [999415252] [2023-08-27 07:32:26,720 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-27 07:32:26,721 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-27 07:32:26,721 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 07:32:26,721 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-27 07:32:26,721 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2023-08-27 07:32:26,721 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 122 out of 276 [2023-08-27 07:32:26,722 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 84 transitions, 615 flow. Second operand has 3 states, 3 states have (on average 123.33333333333333) internal successors, (370), 3 states have internal predecessors, (370), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:32:26,722 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 07:32:26,722 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 122 of 276 [2023-08-27 07:32:26,722 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 07:32:30,760 INFO L124 PetriNetUnfolderBase]: 59879/73076 cut-off events. [2023-08-27 07:32:30,760 INFO L125 PetriNetUnfolderBase]: For 125810/128042 co-relation queries the response was YES. [2023-08-27 07:32:30,936 INFO L83 FinitePrefix]: Finished finitePrefix Result has 228157 conditions, 73076 events. 59879/73076 cut-off events. For 125810/128042 co-relation queries the response was YES. Maximal size of possible extension queue 4158. Compared 374167 event pairs, 29340 based on Foata normal form. 4875/41970 useless extension candidates. Maximal degree in co-relation 125266. Up to 72882 conditions per place. [2023-08-27 07:32:31,185 INFO L140 encePairwiseOnDemand]: 273/276 looper letters, 71 selfloop transitions, 1 changer transitions 0/76 dead transitions. [2023-08-27 07:32:31,185 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 76 transitions, 676 flow [2023-08-27 07:32:31,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-27 07:32:31,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-27 07:32:31,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 403 transitions. [2023-08-27 07:32:31,187 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4867149758454106 [2023-08-27 07:32:31,187 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 403 transitions. [2023-08-27 07:32:31,187 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 403 transitions. [2023-08-27 07:32:31,187 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 07:32:31,187 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 403 transitions. [2023-08-27 07:32:31,188 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 134.33333333333334) internal successors, (403), 3 states have internal predecessors, (403), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:32:31,189 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 276.0) internal successors, (1104), 4 states have internal predecessors, (1104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:32:31,189 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 276.0) internal successors, (1104), 4 states have internal predecessors, (1104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:32:31,190 INFO L175 Difference]: Start difference. First operand has 68 places, 84 transitions, 615 flow. Second operand 3 states and 403 transitions. [2023-08-27 07:32:31,190 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 76 transitions, 676 flow [2023-08-27 07:32:33,221 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 76 transitions, 650 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-08-27 07:32:33,222 INFO L231 Difference]: Finished difference. Result has 64 places, 76 transitions, 508 flow [2023-08-27 07:32:33,222 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=276, PETRI_DIFFERENCE_MINUEND_FLOW=506, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=76, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=75, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=508, PETRI_PLACES=64, PETRI_TRANSITIONS=76} [2023-08-27 07:32:33,222 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 10 predicate places. [2023-08-27 07:32:33,223 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 76 transitions, 508 flow [2023-08-27 07:32:33,223 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 123.33333333333333) internal successors, (370), 3 states have internal predecessors, (370), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:32:33,223 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 07:32:33,223 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1] [2023-08-27 07:32:33,228 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 07:32:33,427 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 07:32:33,428 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 34 more)] === [2023-08-27 07:32:33,429 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 07:32:33,429 INFO L85 PathProgramCache]: Analyzing trace with hash -1180927478, now seen corresponding path program 2 times [2023-08-27 07:32:33,429 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 07:32:33,429 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1298071626] [2023-08-27 07:32:33,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 07:32:33,429 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 07:32:33,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 07:32:33,500 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 07:32:33,500 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 07:32:33,500 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1298071626] [2023-08-27 07:32:33,500 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1298071626] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 07:32:33,501 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1529491800] [2023-08-27 07:32:33,501 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-27 07:32:33,501 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 07:32:33,501 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 07:32:33,502 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 07:32:33,511 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 07:32:33,573 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-27 07:32:33,573 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 07:32:33,574 INFO L262 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 7 conjunts are in the unsatisfiable core [2023-08-27 07:32:33,575 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 07:32:33,589 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 07:32:33,590 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 07:32:33,633 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 07:32:33,634 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1529491800] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 07:32:33,634 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 07:32:33,634 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 11 [2023-08-27 07:32:33,634 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [215125288] [2023-08-27 07:32:33,634 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 07:32:33,634 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-08-27 07:32:33,635 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 07:32:33,635 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-08-27 07:32:33,636 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2023-08-27 07:32:33,637 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 126 out of 276 [2023-08-27 07:32:33,638 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 76 transitions, 508 flow. Second operand has 13 states, 13 states have (on average 127.3076923076923) internal successors, (1655), 13 states have internal predecessors, (1655), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:32:33,638 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 07:32:33,638 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 126 of 276 [2023-08-27 07:32:33,638 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 07:32:45,876 INFO L124 PetriNetUnfolderBase]: 170313/208245 cut-off events. [2023-08-27 07:32:45,877 INFO L125 PetriNetUnfolderBase]: For 308892/314170 co-relation queries the response was YES. [2023-08-27 07:32:46,357 INFO L83 FinitePrefix]: Finished finitePrefix Result has 609929 conditions, 208245 events. 170313/208245 cut-off events. For 308892/314170 co-relation queries the response was YES. Maximal size of possible extension queue 9065. Compared 1164938 event pairs, 13027 based on Foata normal form. 17849/118972 useless extension candidates. Maximal degree in co-relation 609911. Up to 39067 conditions per place. [2023-08-27 07:32:47,137 INFO L140 encePairwiseOnDemand]: 269/276 looper letters, 339 selfloop transitions, 106 changer transitions 0/449 dead transitions. [2023-08-27 07:32:47,137 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 449 transitions, 3031 flow [2023-08-27 07:32:47,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-08-27 07:32:47,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-08-27 07:32:47,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 1877 transitions. [2023-08-27 07:32:47,142 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5667270531400966 [2023-08-27 07:32:47,142 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 1877 transitions. [2023-08-27 07:32:47,142 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 1877 transitions. [2023-08-27 07:32:47,143 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 07:32:47,143 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 1877 transitions. [2023-08-27 07:32:47,147 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 156.41666666666666) internal successors, (1877), 12 states have internal predecessors, (1877), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:32:47,151 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 276.0) internal successors, (3588), 13 states have internal predecessors, (3588), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:32:47,152 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 276.0) internal successors, (3588), 13 states have internal predecessors, (3588), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:32:47,152 INFO L175 Difference]: Start difference. First operand has 64 places, 76 transitions, 508 flow. Second operand 12 states and 1877 transitions. [2023-08-27 07:32:47,152 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 449 transitions, 3031 flow [2023-08-27 07:32:56,985 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 449 transitions, 3030 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-27 07:32:56,989 INFO L231 Difference]: Finished difference. Result has 84 places, 163 transitions, 1933 flow [2023-08-27 07:32:56,989 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=276, PETRI_DIFFERENCE_MINUEND_FLOW=507, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=76, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=1933, PETRI_PLACES=84, PETRI_TRANSITIONS=163} [2023-08-27 07:32:56,990 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 30 predicate places. [2023-08-27 07:32:56,990 INFO L495 AbstractCegarLoop]: Abstraction has has 84 places, 163 transitions, 1933 flow [2023-08-27 07:32:56,991 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 127.3076923076923) internal successors, (1655), 13 states have internal predecessors, (1655), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:32:56,991 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 07:32:56,991 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 07:32:56,995 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2023-08-27 07:32:57,191 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 07:32:57,191 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting thread3Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 34 more)] === [2023-08-27 07:32:57,192 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 07:32:57,192 INFO L85 PathProgramCache]: Analyzing trace with hash -547486176, now seen corresponding path program 1 times [2023-08-27 07:32:57,192 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 07:32:57,192 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [49637165] [2023-08-27 07:32:57,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 07:32:57,192 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 07:32:57,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 07:32:57,232 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 07:32:57,232 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 07:32:57,232 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [49637165] [2023-08-27 07:32:57,232 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [49637165] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-27 07:32:57,232 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-27 07:32:57,232 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-27 07:32:57,234 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1243823805] [2023-08-27 07:32:57,234 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-27 07:32:57,235 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-27 07:32:57,235 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 07:32:57,235 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-27 07:32:57,235 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-27 07:32:57,236 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 126 out of 276 [2023-08-27 07:32:57,237 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 163 transitions, 1933 flow. Second operand has 3 states, 3 states have (on average 128.33333333333334) internal successors, (385), 3 states have internal predecessors, (385), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:32:57,237 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 07:32:57,237 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 126 of 276 [2023-08-27 07:32:57,237 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 07:33:09,908 INFO L124 PetriNetUnfolderBase]: 139801/176748 cut-off events. [2023-08-27 07:33:09,908 INFO L125 PetriNetUnfolderBase]: For 718082/723202 co-relation queries the response was YES. [2023-08-27 07:33:10,624 INFO L83 FinitePrefix]: Finished finitePrefix Result has 627897 conditions, 176748 events. 139801/176748 cut-off events. For 718082/723202 co-relation queries the response was YES. Maximal size of possible extension queue 8123. Compared 1036024 event pairs, 20649 based on Foata normal form. 5113/101468 useless extension candidates. Maximal degree in co-relation 627868. Up to 157589 conditions per place. [2023-08-27 07:33:11,489 INFO L140 encePairwiseOnDemand]: 267/276 looper letters, 303 selfloop transitions, 3 changer transitions 0/310 dead transitions. [2023-08-27 07:33:11,490 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 86 places, 310 transitions, 4429 flow [2023-08-27 07:33:11,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-27 07:33:11,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-27 07:33:11,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 442 transitions. [2023-08-27 07:33:11,491 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.533816425120773 [2023-08-27 07:33:11,491 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 442 transitions. [2023-08-27 07:33:11,491 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 442 transitions. [2023-08-27 07:33:11,492 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 07:33:11,492 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 442 transitions. [2023-08-27 07:33:11,493 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 147.33333333333334) internal successors, (442), 3 states have internal predecessors, (442), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:33:11,494 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 276.0) internal successors, (1104), 4 states have internal predecessors, (1104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:33:11,494 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 276.0) internal successors, (1104), 4 states have internal predecessors, (1104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:33:11,494 INFO L175 Difference]: Start difference. First operand has 84 places, 163 transitions, 1933 flow. Second operand 3 states and 442 transitions. [2023-08-27 07:33:11,495 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 86 places, 310 transitions, 4429 flow [2023-08-27 07:33:15,953 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 310 transitions, 3937 flow, removed 246 selfloop flow, removed 0 redundant places. [2023-08-27 07:33:15,957 INFO L231 Difference]: Finished difference. Result has 87 places, 165 transitions, 1716 flow [2023-08-27 07:33:15,958 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=276, PETRI_DIFFERENCE_MINUEND_FLOW=1687, PETRI_DIFFERENCE_MINUEND_PLACES=84, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=163, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=160, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=1716, PETRI_PLACES=87, PETRI_TRANSITIONS=165} [2023-08-27 07:33:15,958 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 33 predicate places. [2023-08-27 07:33:15,958 INFO L495 AbstractCegarLoop]: Abstraction has has 87 places, 165 transitions, 1716 flow [2023-08-27 07:33:15,959 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 128.33333333333334) internal successors, (385), 3 states have internal predecessors, (385), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:33:15,959 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 07:33:15,959 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 07:33:15,959 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-08-27 07:33:15,959 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting thread3Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 34 more)] === [2023-08-27 07:33:15,959 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 07:33:15,959 INFO L85 PathProgramCache]: Analyzing trace with hash -547486132, now seen corresponding path program 1 times [2023-08-27 07:33:15,960 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 07:33:15,960 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1919133866] [2023-08-27 07:33:15,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 07:33:15,960 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 07:33:15,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 07:33:15,986 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 07:33:15,986 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 07:33:15,987 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1919133866] [2023-08-27 07:33:15,987 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1919133866] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-27 07:33:15,987 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-27 07:33:15,987 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-27 07:33:15,987 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [564354885] [2023-08-27 07:33:15,987 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-27 07:33:15,987 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-27 07:33:15,988 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 07:33:15,988 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-27 07:33:15,988 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-27 07:33:15,988 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 122 out of 276 [2023-08-27 07:33:15,989 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 165 transitions, 1716 flow. Second operand has 3 states, 3 states have (on average 124.66666666666667) internal successors, (374), 3 states have internal predecessors, (374), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:33:15,989 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 07:33:15,989 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 122 of 276 [2023-08-27 07:33:15,989 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 07:33:30,262 INFO L124 PetriNetUnfolderBase]: 144197/183584 cut-off events. [2023-08-27 07:33:30,262 INFO L125 PetriNetUnfolderBase]: For 433990/439961 co-relation queries the response was YES. [2023-08-27 07:33:31,403 INFO L83 FinitePrefix]: Finished finitePrefix Result has 687079 conditions, 183584 events. 144197/183584 cut-off events. For 433990/439961 co-relation queries the response was YES. Maximal size of possible extension queue 8234. Compared 1148981 event pairs, 82615 based on Foata normal form. 5439/127984 useless extension candidates. Maximal degree in co-relation 687047. Up to 173849 conditions per place. [2023-08-27 07:33:32,107 INFO L140 encePairwiseOnDemand]: 272/276 looper letters, 299 selfloop transitions, 3 changer transitions 0/305 dead transitions. [2023-08-27 07:33:32,107 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 305 transitions, 3939 flow [2023-08-27 07:33:32,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-27 07:33:32,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-27 07:33:32,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 421 transitions. [2023-08-27 07:33:32,108 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5084541062801933 [2023-08-27 07:33:32,109 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 421 transitions. [2023-08-27 07:33:32,109 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 421 transitions. [2023-08-27 07:33:32,109 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 07:33:32,109 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 421 transitions. [2023-08-27 07:33:32,110 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 140.33333333333334) internal successors, (421), 3 states have internal predecessors, (421), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:33:32,111 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 276.0) internal successors, (1104), 4 states have internal predecessors, (1104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:33:32,111 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 276.0) internal successors, (1104), 4 states have internal predecessors, (1104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:33:32,111 INFO L175 Difference]: Start difference. First operand has 87 places, 165 transitions, 1716 flow. Second operand 3 states and 421 transitions. [2023-08-27 07:33:32,112 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 305 transitions, 3939 flow [2023-08-27 07:33:48,987 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 305 transitions, 3917 flow, removed 10 selfloop flow, removed 1 redundant places. [2023-08-27 07:33:48,989 INFO L231 Difference]: Finished difference. Result has 89 places, 165 transitions, 1712 flow [2023-08-27 07:33:48,990 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=276, PETRI_DIFFERENCE_MINUEND_FLOW=1699, PETRI_DIFFERENCE_MINUEND_PLACES=86, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=164, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=161, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=1712, PETRI_PLACES=89, PETRI_TRANSITIONS=165} [2023-08-27 07:33:48,990 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 35 predicate places. [2023-08-27 07:33:48,990 INFO L495 AbstractCegarLoop]: Abstraction has has 89 places, 165 transitions, 1712 flow [2023-08-27 07:33:48,990 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 124.66666666666667) internal successors, (374), 3 states have internal predecessors, (374), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:33:48,991 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 07:33:48,991 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 07:33:48,991 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-08-27 07:33:48,991 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting thread3Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 34 more)] === [2023-08-27 07:33:48,991 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 07:33:48,991 INFO L85 PathProgramCache]: Analyzing trace with hash 207800408, now seen corresponding path program 1 times [2023-08-27 07:33:48,991 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 07:33:48,991 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [673068552] [2023-08-27 07:33:48,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 07:33:48,992 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 07:33:49,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 07:33:49,025 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 07:33:49,025 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 07:33:49,025 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [673068552] [2023-08-27 07:33:49,025 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [673068552] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 07:33:49,025 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1996980337] [2023-08-27 07:33:49,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 07:33:49,026 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 07:33:49,026 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 07:33:49,029 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 07:33:49,037 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 07:33:49,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 07:33:49,113 INFO L262 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-27 07:33:49,113 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 07:33:49,133 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 07:33:49,133 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 07:33:49,150 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 07:33:49,151 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1996980337] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 07:33:49,151 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 07:33:49,151 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 5 [2023-08-27 07:33:49,151 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [848877300] [2023-08-27 07:33:49,151 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 07:33:49,151 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-27 07:33:49,151 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 07:33:49,152 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-27 07:33:49,152 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-08-27 07:33:49,152 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 126 out of 276 [2023-08-27 07:33:49,153 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 165 transitions, 1712 flow. Second operand has 7 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 07:33:49,153 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 07:33:49,153 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 126 of 276 [2023-08-27 07:33:49,153 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand