./Ultimate.py --spec /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/properties/no-overflow.prp --file /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/parallel-misc-3.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for overflows Using default analysis Version 4a390ef5 Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/parallel-misc-3.wvr.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Overflow-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! overflow) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 206fc494d359c55f00dca0f227d0ffa61103c97cbe34d3166496eff2224a478a --- Real Ultimate output --- This is Ultimate 0.2.5-dev-4a390ef-m [2024-10-24 23:40:04,058 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-10-24 23:40:04,135 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Overflow-32bit-Automizer_Default.epf [2024-10-24 23:40:04,140 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-10-24 23:40:04,142 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-10-24 23:40:04,168 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-10-24 23:40:04,169 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-10-24 23:40:04,170 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-10-24 23:40:04,171 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-10-24 23:40:04,172 INFO L153 SettingsManager]: * Use memory slicer=true [2024-10-24 23:40:04,172 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-10-24 23:40:04,173 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-10-24 23:40:04,174 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-10-24 23:40:04,174 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-10-24 23:40:04,176 INFO L153 SettingsManager]: * Use SBE=true [2024-10-24 23:40:04,176 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-10-24 23:40:04,177 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-10-24 23:40:04,177 INFO L153 SettingsManager]: * sizeof long=4 [2024-10-24 23:40:04,177 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-10-24 23:40:04,178 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-10-24 23:40:04,181 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-10-24 23:40:04,182 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-10-24 23:40:04,183 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-10-24 23:40:04,183 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-10-24 23:40:04,183 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-10-24 23:40:04,183 INFO L153 SettingsManager]: * Check absence of signed integer overflows=ASSERTandASSUME [2024-10-24 23:40:04,184 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-10-24 23:40:04,184 INFO L153 SettingsManager]: * sizeof long double=12 [2024-10-24 23:40:04,184 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-10-24 23:40:04,184 INFO L153 SettingsManager]: * Use constant arrays=true [2024-10-24 23:40:04,185 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-10-24 23:40:04,185 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-10-24 23:40:04,185 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-10-24 23:40:04,185 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-10-24 23:40:04,185 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-24 23:40:04,186 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-10-24 23:40:04,186 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-10-24 23:40:04,188 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-10-24 23:40:04,189 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-10-24 23:40:04,189 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-10-24 23:40:04,190 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-10-24 23:40:04,190 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-10-24 23:40:04,190 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-10-24 23:40:04,191 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-10-24 23:40:04,191 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! overflow) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 206fc494d359c55f00dca0f227d0ffa61103c97cbe34d3166496eff2224a478a [2024-10-24 23:40:04,499 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-10-24 23:40:04,527 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-10-24 23:40:04,548 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-10-24 23:40:04,549 INFO L270 PluginConnector]: Initializing CDTParser... [2024-10-24 23:40:04,550 INFO L274 PluginConnector]: CDTParser initialized [2024-10-24 23:40:04,551 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/parallel-misc-3.wvr.c [2024-10-24 23:40:06,018 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-10-24 23:40:06,234 INFO L384 CDTParser]: Found 1 translation units. [2024-10-24 23:40:06,234 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/parallel-misc-3.wvr.c [2024-10-24 23:40:06,243 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8424c6f22/28427debc93f41b9b8abd0b52aae8468/FLAGe400dc603 [2024-10-24 23:40:06,258 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8424c6f22/28427debc93f41b9b8abd0b52aae8468 [2024-10-24 23:40:06,260 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-10-24 23:40:06,261 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-10-24 23:40:06,263 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-10-24 23:40:06,263 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-10-24 23:40:06,273 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-10-24 23:40:06,274 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.10 11:40:06" (1/1) ... [2024-10-24 23:40:06,277 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4f609f0b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 11:40:06, skipping insertion in model container [2024-10-24 23:40:06,277 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.10 11:40:06" (1/1) ... [2024-10-24 23:40:06,306 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-10-24 23:40:06,530 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-24 23:40:06,541 INFO L200 MainTranslator]: Completed pre-run [2024-10-24 23:40:06,568 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-24 23:40:06,589 INFO L204 MainTranslator]: Completed translation [2024-10-24 23:40:06,589 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 11:40:06 WrapperNode [2024-10-24 23:40:06,590 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-10-24 23:40:06,591 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-10-24 23:40:06,591 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-10-24 23:40:06,591 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-10-24 23:40:06,598 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 11:40:06" (1/1) ... [2024-10-24 23:40:06,605 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 11:40:06" (1/1) ... [2024-10-24 23:40:06,625 INFO L138 Inliner]: procedures = 20, calls = 18, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 42 [2024-10-24 23:40:06,626 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-10-24 23:40:06,626 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-10-24 23:40:06,627 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-10-24 23:40:06,627 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-10-24 23:40:06,641 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 11:40:06" (1/1) ... [2024-10-24 23:40:06,641 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 11:40:06" (1/1) ... [2024-10-24 23:40:06,646 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 11:40:06" (1/1) ... [2024-10-24 23:40:06,663 INFO L175 MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0]. [2024-10-24 23:40:06,664 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 11:40:06" (1/1) ... [2024-10-24 23:40:06,664 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 11:40:06" (1/1) ... [2024-10-24 23:40:06,670 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 11:40:06" (1/1) ... [2024-10-24 23:40:06,674 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 11:40:06" (1/1) ... [2024-10-24 23:40:06,675 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 11:40:06" (1/1) ... [2024-10-24 23:40:06,676 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 11:40:06" (1/1) ... [2024-10-24 23:40:06,681 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-10-24 23:40:06,682 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-10-24 23:40:06,686 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-10-24 23:40:06,686 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-10-24 23:40:06,687 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 11:40:06" (1/1) ... [2024-10-24 23:40:06,694 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-24 23:40:06,703 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-24 23:40:06,718 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-10-24 23:40:06,721 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-10-24 23:40:06,776 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-10-24 23:40:06,776 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-10-24 23:40:06,776 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-10-24 23:40:06,776 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-10-24 23:40:06,776 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-10-24 23:40:06,777 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-10-24 23:40:06,777 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-10-24 23:40:06,777 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-10-24 23:40:06,777 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-10-24 23:40:06,777 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-10-24 23:40:06,780 WARN L207 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2024-10-24 23:40:06,867 INFO L238 CfgBuilder]: Building ICFG [2024-10-24 23:40:06,869 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-10-24 23:40:07,075 INFO L283 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-10-24 23:40:07,075 INFO L287 CfgBuilder]: Performing block encoding [2024-10-24 23:40:07,214 INFO L309 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-10-24 23:40:07,215 INFO L314 CfgBuilder]: Removed 2 assume(true) statements. [2024-10-24 23:40:07,215 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.10 11:40:07 BoogieIcfgContainer [2024-10-24 23:40:07,215 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-10-24 23:40:07,217 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-10-24 23:40:07,217 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-10-24 23:40:07,221 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-10-24 23:40:07,221 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.10 11:40:06" (1/3) ... [2024-10-24 23:40:07,222 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@422967e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.10 11:40:07, skipping insertion in model container [2024-10-24 23:40:07,222 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 11:40:06" (2/3) ... [2024-10-24 23:40:07,223 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@422967e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.10 11:40:07, skipping insertion in model container [2024-10-24 23:40:07,223 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.10 11:40:07" (3/3) ... [2024-10-24 23:40:07,225 INFO L112 eAbstractionObserver]: Analyzing ICFG parallel-misc-3.wvr.c [2024-10-24 23:40:07,243 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-10-24 23:40:07,245 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 8 error locations. [2024-10-24 23:40:07,245 INFO L484 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-10-24 23:40:07,304 INFO L143 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2024-10-24 23:40:07,340 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 37 places, 34 transitions, 82 flow [2024-10-24 23:40:07,362 INFO L124 PetriNetUnfolderBase]: 4/32 cut-off events. [2024-10-24 23:40:07,363 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-10-24 23:40:07,367 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41 conditions, 32 events. 4/32 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 79 event pairs, 0 based on Foata normal form. 0/20 useless extension candidates. Maximal degree in co-relation 29. Up to 2 conditions per place. [2024-10-24 23:40:07,368 INFO L82 GeneralOperation]: Start removeDead. Operand has 37 places, 34 transitions, 82 flow [2024-10-24 23:40:07,371 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 33 places, 30 transitions, 69 flow [2024-10-24 23:40:07,378 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-10-24 23:40:07,384 INFO L333 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, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopHeads, 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;@1ca6e861, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-10-24 23:40:07,384 INFO L334 AbstractCegarLoop]: Starting to check reachability of 18 error locations. [2024-10-24 23:40:07,390 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-10-24 23:40:07,391 INFO L124 PetriNetUnfolderBase]: 1/14 cut-off events. [2024-10-24 23:40:07,391 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2024-10-24 23:40:07,391 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-24 23:40:07,392 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2024-10-24 23:40:07,393 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 15 more)] === [2024-10-24 23:40:07,398 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 23:40:07,400 INFO L85 PathProgramCache]: Analyzing trace with hash 665994112, now seen corresponding path program 1 times [2024-10-24 23:40:07,409 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 23:40:07,410 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [381146709] [2024-10-24 23:40:07,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 23:40:07,411 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 23:40:07,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 23:40:07,643 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 23:40:07,643 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 23:40:07,644 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [381146709] [2024-10-24 23:40:07,644 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [381146709] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-24 23:40:07,645 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-24 23:40:07,645 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-10-24 23:40:07,646 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1000843533] [2024-10-24 23:40:07,648 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-24 23:40:07,657 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-24 23:40:07,661 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 23:40:07,682 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-24 23:40:07,682 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-24 23:40:07,684 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 34 [2024-10-24 23:40:07,686 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 33 places, 30 transitions, 69 flow. Second operand has 3 states, 3 states have (on average 11.0) internal successors, (33), 3 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 23:40:07,686 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-24 23:40:07,687 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 34 [2024-10-24 23:40:07,688 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-24 23:40:07,886 INFO L124 PetriNetUnfolderBase]: 450/700 cut-off events. [2024-10-24 23:40:07,886 INFO L125 PetriNetUnfolderBase]: For 21/21 co-relation queries the response was YES. [2024-10-24 23:40:07,890 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1347 conditions, 700 events. 450/700 cut-off events. For 21/21 co-relation queries the response was YES. Maximal size of possible extension queue 93. Compared 3217 event pairs, 72 based on Foata normal form. 0/402 useless extension candidates. Maximal degree in co-relation 1268. Up to 591 conditions per place. [2024-10-24 23:40:07,898 INFO L140 encePairwiseOnDemand]: 21/34 looper letters, 27 selfloop transitions, 5 changer transitions 0/40 dead transitions. [2024-10-24 23:40:07,898 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 35 places, 40 transitions, 159 flow [2024-10-24 23:40:07,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-24 23:40:07,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-10-24 23:40:07,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 70 transitions. [2024-10-24 23:40:07,912 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6862745098039216 [2024-10-24 23:40:07,914 INFO L175 Difference]: Start difference. First operand has 33 places, 30 transitions, 69 flow. Second operand 3 states and 70 transitions. [2024-10-24 23:40:07,915 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 35 places, 40 transitions, 159 flow [2024-10-24 23:40:07,919 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 32 places, 40 transitions, 151 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-10-24 23:40:07,922 INFO L231 Difference]: Finished difference. Result has 33 places, 34 transitions, 111 flow [2024-10-24 23:40:07,924 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=64, PETRI_DIFFERENCE_MINUEND_PLACES=30, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=30, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=111, PETRI_PLACES=33, PETRI_TRANSITIONS=34} [2024-10-24 23:40:07,930 INFO L277 CegarLoopForPetriNet]: 33 programPoint places, 0 predicate places. [2024-10-24 23:40:07,930 INFO L471 AbstractCegarLoop]: Abstraction has has 33 places, 34 transitions, 111 flow [2024-10-24 23:40:07,930 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 11.0) internal successors, (33), 3 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 23:40:07,930 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-24 23:40:07,931 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1] [2024-10-24 23:40:07,931 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-10-24 23:40:07,931 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 15 more)] === [2024-10-24 23:40:07,932 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 23:40:07,932 INFO L85 PathProgramCache]: Analyzing trace with hash -1232427654, now seen corresponding path program 1 times [2024-10-24 23:40:07,932 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 23:40:07,932 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1888525410] [2024-10-24 23:40:07,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 23:40:07,933 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 23:40:07,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 23:40:08,086 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 23:40:08,087 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 23:40:08,087 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1888525410] [2024-10-24 23:40:08,087 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1888525410] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-24 23:40:08,087 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [578289607] [2024-10-24 23:40:08,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 23:40:08,088 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 23:40:08,088 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-24 23:40:08,091 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) [2024-10-24 23:40:08,093 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-10-24 23:40:08,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 23:40:08,166 INFO L255 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-10-24 23:40:08,171 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-24 23:40:08,233 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 23:40:08,234 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-24 23:40:08,234 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [578289607] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-24 23:40:08,234 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-10-24 23:40:08,235 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [2] total 3 [2024-10-24 23:40:08,235 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [578041789] [2024-10-24 23:40:08,236 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-24 23:40:08,236 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-24 23:40:08,236 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 23:40:08,237 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-24 23:40:08,237 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2024-10-24 23:40:08,238 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 34 [2024-10-24 23:40:08,239 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 33 places, 34 transitions, 111 flow. Second operand has 4 states, 4 states have (on average 11.25) internal successors, (45), 4 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 23:40:08,239 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-24 23:40:08,240 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 34 [2024-10-24 23:40:08,240 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-24 23:40:08,574 INFO L124 PetriNetUnfolderBase]: 763/1260 cut-off events. [2024-10-24 23:40:08,575 INFO L125 PetriNetUnfolderBase]: For 218/218 co-relation queries the response was YES. [2024-10-24 23:40:08,580 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3031 conditions, 1260 events. 763/1260 cut-off events. For 218/218 co-relation queries the response was YES. Maximal size of possible extension queue 122. Compared 6268 event pairs, 86 based on Foata normal form. 0/793 useless extension candidates. Maximal degree in co-relation 2401. Up to 659 conditions per place. [2024-10-24 23:40:08,590 INFO L140 encePairwiseOnDemand]: 21/34 looper letters, 39 selfloop transitions, 19 changer transitions 0/66 dead transitions. [2024-10-24 23:40:08,590 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 36 places, 66 transitions, 329 flow [2024-10-24 23:40:08,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-24 23:40:08,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-10-24 23:40:08,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 102 transitions. [2024-10-24 23:40:08,593 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.75 [2024-10-24 23:40:08,593 INFO L175 Difference]: Start difference. First operand has 33 places, 34 transitions, 111 flow. Second operand 4 states and 102 transitions. [2024-10-24 23:40:08,593 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 36 places, 66 transitions, 329 flow [2024-10-24 23:40:08,595 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 35 places, 66 transitions, 324 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-10-24 23:40:08,598 INFO L231 Difference]: Finished difference. Result has 37 places, 48 transitions, 260 flow [2024-10-24 23:40:08,600 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=106, PETRI_DIFFERENCE_MINUEND_PLACES=32, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=260, PETRI_PLACES=37, PETRI_TRANSITIONS=48} [2024-10-24 23:40:08,601 INFO L277 CegarLoopForPetriNet]: 33 programPoint places, 4 predicate places. [2024-10-24 23:40:08,601 INFO L471 AbstractCegarLoop]: Abstraction has has 37 places, 48 transitions, 260 flow [2024-10-24 23:40:08,601 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 11.25) internal successors, (45), 4 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 23:40:08,601 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-24 23:40:08,602 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-24 23:40:08,620 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-10-24 23:40:08,802 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 23:40:08,803 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting thread2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 15 more)] === [2024-10-24 23:40:08,804 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 23:40:08,804 INFO L85 PathProgramCache]: Analyzing trace with hash 1214627599, now seen corresponding path program 1 times [2024-10-24 23:40:08,804 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 23:40:08,805 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2016728636] [2024-10-24 23:40:08,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 23:40:08,805 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 23:40:08,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 23:40:08,876 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 23:40:08,877 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 23:40:08,877 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2016728636] [2024-10-24 23:40:08,877 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2016728636] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-24 23:40:08,877 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-24 23:40:08,878 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-24 23:40:08,878 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [11395530] [2024-10-24 23:40:08,878 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-24 23:40:08,878 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-24 23:40:08,879 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 23:40:08,879 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-24 23:40:08,879 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-10-24 23:40:08,880 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 34 [2024-10-24 23:40:08,880 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 37 places, 48 transitions, 260 flow. Second operand has 4 states, 4 states have (on average 11.5) internal successors, (46), 4 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 23:40:08,881 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-24 23:40:08,881 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 34 [2024-10-24 23:40:08,881 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-24 23:40:09,112 INFO L124 PetriNetUnfolderBase]: 847/1412 cut-off events. [2024-10-24 23:40:09,113 INFO L125 PetriNetUnfolderBase]: For 2760/2760 co-relation queries the response was YES. [2024-10-24 23:40:09,115 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4365 conditions, 1412 events. 847/1412 cut-off events. For 2760/2760 co-relation queries the response was YES. Maximal size of possible extension queue 130. Compared 7218 event pairs, 84 based on Foata normal form. 84/1328 useless extension candidates. Maximal degree in co-relation 3577. Up to 1074 conditions per place. [2024-10-24 23:40:09,124 INFO L140 encePairwiseOnDemand]: 21/34 looper letters, 49 selfloop transitions, 13 changer transitions 0/70 dead transitions. [2024-10-24 23:40:09,124 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 40 places, 70 transitions, 466 flow [2024-10-24 23:40:09,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-24 23:40:09,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-10-24 23:40:09,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 100 transitions. [2024-10-24 23:40:09,127 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.7352941176470589 [2024-10-24 23:40:09,127 INFO L175 Difference]: Start difference. First operand has 37 places, 48 transitions, 260 flow. Second operand 4 states and 100 transitions. [2024-10-24 23:40:09,127 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 40 places, 70 transitions, 466 flow [2024-10-24 23:40:09,129 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 70 transitions, 466 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-10-24 23:40:09,132 INFO L231 Difference]: Finished difference. Result has 42 places, 56 transitions, 390 flow [2024-10-24 23:40:09,132 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=260, PETRI_DIFFERENCE_MINUEND_PLACES=37, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=390, PETRI_PLACES=42, PETRI_TRANSITIONS=56} [2024-10-24 23:40:09,134 INFO L277 CegarLoopForPetriNet]: 33 programPoint places, 9 predicate places. [2024-10-24 23:40:09,134 INFO L471 AbstractCegarLoop]: Abstraction has has 42 places, 56 transitions, 390 flow [2024-10-24 23:40:09,134 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 11.5) internal successors, (46), 4 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 23:40:09,134 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-24 23:40:09,135 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-24 23:40:09,135 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-10-24 23:40:09,135 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 15 more)] === [2024-10-24 23:40:09,135 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 23:40:09,135 INFO L85 PathProgramCache]: Analyzing trace with hash -1227079887, now seen corresponding path program 1 times [2024-10-24 23:40:09,136 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 23:40:09,136 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1031132536] [2024-10-24 23:40:09,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 23:40:09,137 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 23:40:09,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 23:40:09,208 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 23:40:09,208 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 23:40:09,208 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1031132536] [2024-10-24 23:40:09,208 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1031132536] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-24 23:40:09,209 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-24 23:40:09,209 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-24 23:40:09,209 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [942687369] [2024-10-24 23:40:09,209 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-24 23:40:09,209 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-24 23:40:09,209 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 23:40:09,210 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-24 23:40:09,210 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-10-24 23:40:09,210 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 34 [2024-10-24 23:40:09,210 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 56 transitions, 390 flow. Second operand has 4 states, 4 states have (on average 11.5) internal successors, (46), 4 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 23:40:09,211 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-24 23:40:09,211 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 34 [2024-10-24 23:40:09,211 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-24 23:40:09,432 INFO L124 PetriNetUnfolderBase]: 911/1541 cut-off events. [2024-10-24 23:40:09,432 INFO L125 PetriNetUnfolderBase]: For 5875/5875 co-relation queries the response was YES. [2024-10-24 23:40:09,436 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5480 conditions, 1541 events. 911/1541 cut-off events. For 5875/5875 co-relation queries the response was YES. Maximal size of possible extension queue 118. Compared 8279 event pairs, 88 based on Foata normal form. 88/1453 useless extension candidates. Maximal degree in co-relation 4770. Up to 1187 conditions per place. [2024-10-24 23:40:09,446 INFO L140 encePairwiseOnDemand]: 21/34 looper letters, 55 selfloop transitions, 13 changer transitions 0/76 dead transitions. [2024-10-24 23:40:09,447 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 76 transitions, 618 flow [2024-10-24 23:40:09,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-24 23:40:09,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-10-24 23:40:09,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 98 transitions. [2024-10-24 23:40:09,449 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.7205882352941176 [2024-10-24 23:40:09,449 INFO L175 Difference]: Start difference. First operand has 42 places, 56 transitions, 390 flow. Second operand 4 states and 98 transitions. [2024-10-24 23:40:09,449 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 76 transitions, 618 flow [2024-10-24 23:40:09,454 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 76 transitions, 602 flow, removed 8 selfloop flow, removed 0 redundant places. [2024-10-24 23:40:09,455 INFO L231 Difference]: Finished difference. Result has 47 places, 64 transitions, 520 flow [2024-10-24 23:40:09,456 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=374, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=520, PETRI_PLACES=47, PETRI_TRANSITIONS=64} [2024-10-24 23:40:09,456 INFO L277 CegarLoopForPetriNet]: 33 programPoint places, 14 predicate places. [2024-10-24 23:40:09,457 INFO L471 AbstractCegarLoop]: Abstraction has has 47 places, 64 transitions, 520 flow [2024-10-24 23:40:09,457 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 11.5) internal successors, (46), 4 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 23:40:09,457 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-24 23:40:09,457 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1] [2024-10-24 23:40:09,457 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-10-24 23:40:09,458 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 15 more)] === [2024-10-24 23:40:09,458 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 23:40:09,458 INFO L85 PathProgramCache]: Analyzing trace with hash -1232427653, now seen corresponding path program 1 times [2024-10-24 23:40:09,459 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 23:40:09,459 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [62643223] [2024-10-24 23:40:09,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 23:40:09,459 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 23:40:09,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 23:40:09,531 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 23:40:09,531 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 23:40:09,531 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [62643223] [2024-10-24 23:40:09,531 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [62643223] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-24 23:40:09,531 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [977404598] [2024-10-24 23:40:09,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 23:40:09,532 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 23:40:09,532 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-24 23:40:09,548 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) [2024-10-24 23:40:09,549 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-10-24 23:40:09,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 23:40:09,595 INFO L255 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-10-24 23:40:09,596 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-24 23:40:09,621 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 23:40:09,621 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-24 23:40:09,656 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 23:40:09,656 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [977404598] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-24 23:40:09,656 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-24 23:40:09,656 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 5 [2024-10-24 23:40:09,656 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [544209256] [2024-10-24 23:40:09,657 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-24 23:40:09,657 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-10-24 23:40:09,658 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 23:40:09,658 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-10-24 23:40:09,658 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-10-24 23:40:09,659 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 34 [2024-10-24 23:40:09,659 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 64 transitions, 520 flow. Second operand has 7 states, 7 states have (on average 11.857142857142858) internal successors, (83), 7 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 23:40:09,659 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-24 23:40:09,659 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 34 [2024-10-24 23:40:09,659 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-24 23:40:10,187 INFO L124 PetriNetUnfolderBase]: 2065/3531 cut-off events. [2024-10-24 23:40:10,187 INFO L125 PetriNetUnfolderBase]: For 27000/27000 co-relation queries the response was YES. [2024-10-24 23:40:10,197 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13976 conditions, 3531 events. 2065/3531 cut-off events. For 27000/27000 co-relation queries the response was YES. Maximal size of possible extension queue 193. Compared 19856 event pairs, 84 based on Foata normal form. 408/3652 useless extension candidates. Maximal degree in co-relation 12264. Up to 1591 conditions per place. [2024-10-24 23:40:10,224 INFO L140 encePairwiseOnDemand]: 21/34 looper letters, 101 selfloop transitions, 53 changer transitions 0/162 dead transitions. [2024-10-24 23:40:10,224 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 162 transitions, 1596 flow [2024-10-24 23:40:10,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-10-24 23:40:10,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-10-24 23:40:10,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 182 transitions. [2024-10-24 23:40:10,226 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.7647058823529411 [2024-10-24 23:40:10,226 INFO L175 Difference]: Start difference. First operand has 47 places, 64 transitions, 520 flow. Second operand 7 states and 182 transitions. [2024-10-24 23:40:10,226 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 162 transitions, 1596 flow [2024-10-24 23:40:10,242 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 162 transitions, 1524 flow, removed 36 selfloop flow, removed 0 redundant places. [2024-10-24 23:40:10,245 INFO L231 Difference]: Finished difference. Result has 57 places, 106 transitions, 1282 flow [2024-10-24 23:40:10,245 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=496, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=64, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1282, PETRI_PLACES=57, PETRI_TRANSITIONS=106} [2024-10-24 23:40:10,245 INFO L277 CegarLoopForPetriNet]: 33 programPoint places, 24 predicate places. [2024-10-24 23:40:10,246 INFO L471 AbstractCegarLoop]: Abstraction has has 57 places, 106 transitions, 1282 flow [2024-10-24 23:40:10,246 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.857142857142858) internal successors, (83), 7 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 23:40:10,246 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-24 23:40:10,246 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-24 23:40:10,264 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-10-24 23:40:10,450 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 23:40:10,451 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 15 more)] === [2024-10-24 23:40:10,452 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 23:40:10,452 INFO L85 PathProgramCache]: Analyzing trace with hash -1151294792, now seen corresponding path program 1 times [2024-10-24 23:40:10,452 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 23:40:10,452 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1669525765] [2024-10-24 23:40:10,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 23:40:10,453 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 23:40:10,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 23:40:10,576 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 23:40:10,577 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 23:40:10,577 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1669525765] [2024-10-24 23:40:10,577 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1669525765] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-24 23:40:10,577 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1956821846] [2024-10-24 23:40:10,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 23:40:10,577 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 23:40:10,578 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-24 23:40:10,579 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) [2024-10-24 23:40:10,581 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-10-24 23:40:10,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 23:40:10,630 INFO L255 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-10-24 23:40:10,631 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-24 23:40:10,665 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 23:40:10,665 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-24 23:40:10,725 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 23:40:10,725 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1956821846] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-24 23:40:10,725 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-24 23:40:10,725 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 8 [2024-10-24 23:40:10,726 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2076316308] [2024-10-24 23:40:10,726 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-24 23:40:10,726 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-10-24 23:40:10,726 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 23:40:10,727 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-10-24 23:40:10,727 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=47, Unknown=0, NotChecked=0, Total=90 [2024-10-24 23:40:10,727 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 34 [2024-10-24 23:40:10,727 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 106 transitions, 1282 flow. Second operand has 10 states, 10 states have (on average 12.3) internal successors, (123), 10 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 23:40:10,727 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-24 23:40:10,728 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 34 [2024-10-24 23:40:10,728 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-24 23:40:12,944 INFO L124 PetriNetUnfolderBase]: 8931/15706 cut-off events. [2024-10-24 23:40:12,944 INFO L125 PetriNetUnfolderBase]: For 186225/186225 co-relation queries the response was YES. [2024-10-24 23:40:12,999 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66689 conditions, 15706 events. 8931/15706 cut-off events. For 186225/186225 co-relation queries the response was YES. Maximal size of possible extension queue 286. Compared 103845 event pairs, 280 based on Foata normal form. 1496/16077 useless extension candidates. Maximal degree in co-relation 59673. Up to 6286 conditions per place. [2024-10-24 23:40:13,211 INFO L140 encePairwiseOnDemand]: 21/34 looper letters, 208 selfloop transitions, 231 changer transitions 0/447 dead transitions. [2024-10-24 23:40:13,211 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 447 transitions, 5930 flow [2024-10-24 23:40:13,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-10-24 23:40:13,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-10-24 23:40:13,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 262 transitions. [2024-10-24 23:40:13,213 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.7705882352941177 [2024-10-24 23:40:13,213 INFO L175 Difference]: Start difference. First operand has 57 places, 106 transitions, 1282 flow. Second operand 10 states and 262 transitions. [2024-10-24 23:40:13,213 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 447 transitions, 5930 flow [2024-10-24 23:40:13,469 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 447 transitions, 5367 flow, removed 279 selfloop flow, removed 1 redundant places. [2024-10-24 23:40:13,476 INFO L231 Difference]: Finished difference. Result has 71 places, 328 transitions, 4878 flow [2024-10-24 23:40:13,476 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=1109, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=106, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=59, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4878, PETRI_PLACES=71, PETRI_TRANSITIONS=328} [2024-10-24 23:40:13,477 INFO L277 CegarLoopForPetriNet]: 33 programPoint places, 38 predicate places. [2024-10-24 23:40:13,477 INFO L471 AbstractCegarLoop]: Abstraction has has 71 places, 328 transitions, 4878 flow [2024-10-24 23:40:13,478 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.3) internal successors, (123), 10 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 23:40:13,479 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-24 23:40:13,479 INFO L204 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-24 23:40:13,491 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-10-24 23:40:13,679 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 23:40:13,680 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting thread2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 15 more)] === [2024-10-24 23:40:13,680 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 23:40:13,680 INFO L85 PathProgramCache]: Analyzing trace with hash 1150600673, now seen corresponding path program 1 times [2024-10-24 23:40:13,680 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 23:40:13,681 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1696987676] [2024-10-24 23:40:13,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 23:40:13,681 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 23:40:13,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 23:40:13,778 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 23:40:13,779 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 23:40:13,779 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1696987676] [2024-10-24 23:40:13,779 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1696987676] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-24 23:40:13,779 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1774194492] [2024-10-24 23:40:13,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 23:40:13,779 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 23:40:13,780 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-24 23:40:13,781 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) [2024-10-24 23:40:13,783 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-10-24 23:40:13,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 23:40:13,837 INFO L255 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-10-24 23:40:13,838 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-24 23:40:13,871 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 23:40:13,871 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-24 23:40:13,940 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 23:40:13,940 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1774194492] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-24 23:40:13,940 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-24 23:40:13,940 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 9 [2024-10-24 23:40:13,940 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [16371745] [2024-10-24 23:40:13,941 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-24 23:40:13,941 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-10-24 23:40:13,941 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 23:40:13,942 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-10-24 23:40:13,942 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2024-10-24 23:40:13,942 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 34 [2024-10-24 23:40:13,942 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 328 transitions, 4878 flow. Second operand has 11 states, 11 states have (on average 12.272727272727273) internal successors, (135), 11 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 23:40:13,942 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-24 23:40:13,943 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 34 [2024-10-24 23:40:13,943 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-24 23:40:19,408 INFO L124 PetriNetUnfolderBase]: 23277/41485 cut-off events. [2024-10-24 23:40:19,408 INFO L125 PetriNetUnfolderBase]: For 698276/698276 co-relation queries the response was YES. [2024-10-24 23:40:19,566 INFO L83 FinitePrefix]: Finished finitePrefix Result has 184140 conditions, 41485 events. 23277/41485 cut-off events. For 698276/698276 co-relation queries the response was YES. Maximal size of possible extension queue 722. Compared 325614 event pairs, 930 based on Foata normal form. 6093/44459 useless extension candidates. Maximal degree in co-relation 167474. Up to 14887 conditions per place. [2024-10-24 23:40:19,915 INFO L140 encePairwiseOnDemand]: 21/34 looper letters, 324 selfloop transitions, 632 changer transitions 0/964 dead transitions. [2024-10-24 23:40:19,915 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 964 transitions, 15964 flow [2024-10-24 23:40:19,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-10-24 23:40:19,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-10-24 23:40:19,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 302 transitions. [2024-10-24 23:40:19,919 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.8074866310160428 [2024-10-24 23:40:19,923 INFO L175 Difference]: Start difference. First operand has 71 places, 328 transitions, 4878 flow. Second operand 11 states and 302 transitions. [2024-10-24 23:40:19,923 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 964 transitions, 15964 flow [2024-10-24 23:40:21,281 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 964 transitions, 15398 flow, removed 271 selfloop flow, removed 2 redundant places. [2024-10-24 23:40:21,299 INFO L231 Difference]: Finished difference. Result has 87 places, 894 transitions, 17026 flow [2024-10-24 23:40:21,300 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=4654, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=328, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=209, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=115, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=17026, PETRI_PLACES=87, PETRI_TRANSITIONS=894} [2024-10-24 23:40:21,301 INFO L277 CegarLoopForPetriNet]: 33 programPoint places, 54 predicate places. [2024-10-24 23:40:21,301 INFO L471 AbstractCegarLoop]: Abstraction has has 87 places, 894 transitions, 17026 flow [2024-10-24 23:40:21,301 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 12.272727272727273) internal successors, (135), 11 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 23:40:21,301 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-24 23:40:21,302 INFO L204 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-24 23:40:21,320 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-10-24 23:40:21,506 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 23:40:21,507 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 15 more)] === [2024-10-24 23:40:21,507 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 23:40:21,507 INFO L85 PathProgramCache]: Analyzing trace with hash 544347, now seen corresponding path program 1 times [2024-10-24 23:40:21,507 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 23:40:21,508 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [184116523] [2024-10-24 23:40:21,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 23:40:21,508 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 23:40:21,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 23:40:21,638 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 23:40:21,638 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 23:40:21,638 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [184116523] [2024-10-24 23:40:21,640 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [184116523] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-24 23:40:21,640 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1851776929] [2024-10-24 23:40:21,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 23:40:21,643 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 23:40:21,644 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-24 23:40:21,645 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) [2024-10-24 23:40:21,650 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-10-24 23:40:21,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 23:40:21,706 INFO L255 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-10-24 23:40:21,707 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-24 23:40:21,748 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 23:40:21,749 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-24 23:40:21,829 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 23:40:21,829 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1851776929] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-24 23:40:21,830 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-24 23:40:21,830 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 11 [2024-10-24 23:40:21,830 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [388981135] [2024-10-24 23:40:21,830 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-24 23:40:21,830 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-10-24 23:40:21,831 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 23:40:21,831 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-10-24 23:40:21,831 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2024-10-24 23:40:21,831 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 34 [2024-10-24 23:40:21,832 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 894 transitions, 17026 flow. Second operand has 13 states, 13 states have (on average 12.23076923076923) internal successors, (159), 13 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 23:40:21,832 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-24 23:40:21,832 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 34 [2024-10-24 23:40:21,832 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-24 23:40:55,074 INFO L124 PetriNetUnfolderBase]: 89341/159575 cut-off events. [2024-10-24 23:40:55,074 INFO L125 PetriNetUnfolderBase]: For 3197758/3197758 co-relation queries the response was YES. [2024-10-24 23:40:55,968 INFO L83 FinitePrefix]: Finished finitePrefix Result has 829724 conditions, 159575 events. 89341/159575 cut-off events. For 3197758/3197758 co-relation queries the response was YES. Maximal size of possible extension queue 2512. Compared 1496624 event pairs, 2465 based on Foata normal form. 4337/151726 useless extension candidates. Maximal degree in co-relation 780659. Up to 48348 conditions per place. [2024-10-24 23:40:56,838 INFO L140 encePairwiseOnDemand]: 21/34 looper letters, 1584 selfloop transitions, 2923 changer transitions 0/4515 dead transitions. [2024-10-24 23:40:56,839 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 99 places, 4515 transitions, 97119 flow [2024-10-24 23:40:56,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-10-24 23:40:56,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-10-24 23:40:56,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 362 transitions. [2024-10-24 23:40:56,840 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.8190045248868778 [2024-10-24 23:40:56,840 INFO L175 Difference]: Start difference. First operand has 87 places, 894 transitions, 17026 flow. Second operand 13 states and 362 transitions. [2024-10-24 23:40:56,840 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 99 places, 4515 transitions, 97119 flow