./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-C-DAC/pthread-demo-datarace-1.i --full-output --preprocessor.use.memory.slicer false --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 6ae2ee47 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 ../../../trunk/examples/svcomp/pthread-C-DAC/pthread-demo-datarace-1.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-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 ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 81147b3e42a82bd92b2fd1c17836bc41bf8598e66ad2317620561a8ac507fa9a --preprocessor.use.memory.slicer false --- Real Ultimate output --- This is Ultimate 0.2.3-dev-6ae2ee4-m [2023-11-22 21:24:06,526 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-22 21:24:06,587 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-22 21:24:06,592 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-22 21:24:06,592 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-22 21:24:06,613 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-22 21:24:06,614 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-22 21:24:06,614 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-22 21:24:06,615 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-22 21:24:06,617 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-22 21:24:06,618 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-22 21:24:06,618 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-22 21:24:06,619 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-22 21:24:06,620 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-22 21:24:06,620 INFO L153 SettingsManager]: * Use SBE=true [2023-11-22 21:24:06,627 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-22 21:24:06,627 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-22 21:24:06,627 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-22 21:24:06,628 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-22 21:24:06,628 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-22 21:24:06,628 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-22 21:24:06,628 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-22 21:24:06,629 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-22 21:24:06,629 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-22 21:24:06,629 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-22 21:24:06,629 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-22 21:24:06,629 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-22 21:24:06,630 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-22 21:24:06,630 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-22 21:24:06,630 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-22 21:24:06,631 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-22 21:24:06,631 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-22 21:24:06,631 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-22 21:24:06,631 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-22 21:24:06,632 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-22 21:24:06,632 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-22 21:24:06,632 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-22 21:24:06,632 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-22 21:24:06,632 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-22 21:24:06,632 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-22 21:24:06,633 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-22 21:24:06,633 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-22 21:24:06,633 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 81147b3e42a82bd92b2fd1c17836bc41bf8598e66ad2317620561a8ac507fa9a Applying setting for plugin de.uni_freiburg.informatik.ultimate.boogie.preprocessor: Use memory slicer -> false [2023-11-22 21:24:06,816 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-22 21:24:06,837 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-22 21:24:06,840 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-22 21:24:06,841 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-22 21:24:06,841 INFO L274 PluginConnector]: CDTParser initialized [2023-11-22 21:24:06,842 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-C-DAC/pthread-demo-datarace-1.i [2023-11-22 21:24:07,795 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-22 21:24:08,060 INFO L384 CDTParser]: Found 1 translation units. [2023-11-22 21:24:08,060 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-C-DAC/pthread-demo-datarace-1.i [2023-11-22 21:24:08,087 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/390e173cd/1e8941fe5a1a46439b799754cab5e7b3/FLAG45b5845d7 [2023-11-22 21:24:08,100 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/390e173cd/1e8941fe5a1a46439b799754cab5e7b3 [2023-11-22 21:24:08,102 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-22 21:24:08,104 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-22 21:24:08,107 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-22 21:24:08,107 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-22 21:24:08,110 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-22 21:24:08,111 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 09:24:08" (1/1) ... [2023-11-22 21:24:08,111 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@47074f7b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 09:24:08, skipping insertion in model container [2023-11-22 21:24:08,112 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 09:24:08" (1/1) ... [2023-11-22 21:24:08,157 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-22 21:24:08,300 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread-C-DAC/pthread-demo-datarace-1.i[820,833] [2023-11-22 21:24:08,547 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-22 21:24:08,557 INFO L202 MainTranslator]: Completed pre-run [2023-11-22 21:24:08,568 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread-C-DAC/pthread-demo-datarace-1.i[820,833] [2023-11-22 21:24:08,595 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-22 21:24:08,636 INFO L206 MainTranslator]: Completed translation [2023-11-22 21:24:08,637 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 09:24:08 WrapperNode [2023-11-22 21:24:08,637 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-22 21:24:08,638 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-22 21:24:08,638 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-22 21:24:08,638 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-22 21:24:08,643 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 09:24:08" (1/1) ... [2023-11-22 21:24:08,668 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 09:24:08" (1/1) ... [2023-11-22 21:24:08,683 INFO L138 Inliner]: procedures = 365, calls = 22, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 64 [2023-11-22 21:24:08,684 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-22 21:24:08,684 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-22 21:24:08,684 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-22 21:24:08,684 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-22 21:24:08,690 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 09:24:08" (1/1) ... [2023-11-22 21:24:08,690 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 09:24:08" (1/1) ... [2023-11-22 21:24:08,692 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 09:24:08" (1/1) ... [2023-11-22 21:24:08,692 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 09:24:08" (1/1) ... [2023-11-22 21:24:08,695 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 09:24:08" (1/1) ... [2023-11-22 21:24:08,697 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 09:24:08" (1/1) ... [2023-11-22 21:24:08,698 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 09:24:08" (1/1) ... [2023-11-22 21:24:08,699 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 09:24:08" (1/1) ... [2023-11-22 21:24:08,701 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-22 21:24:08,702 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-22 21:24:08,702 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-22 21:24:08,702 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-22 21:24:08,702 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 09:24:08" (1/1) ... [2023-11-22 21:24:08,706 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-22 21:24:08,716 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-22 21:24:08,727 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) [2023-11-22 21:24:08,729 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 [2023-11-22 21:24:08,761 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-22 21:24:08,761 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-22 21:24:08,761 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexUnlock [2023-11-22 21:24:08,762 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-22 21:24:08,763 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-22 21:24:08,763 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2023-11-22 21:24:08,763 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-22 21:24:08,763 INFO L130 BoogieDeclarations]: Found specification of procedure thread_function_mutex [2023-11-22 21:24:08,763 INFO L138 BoogieDeclarations]: Found implementation of procedure thread_function_mutex [2023-11-22 21:24:08,764 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-22 21:24:08,764 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-22 21:24:08,764 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-22 21:24:08,765 WARN L213 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-11-22 21:24:08,894 INFO L241 CfgBuilder]: Building ICFG [2023-11-22 21:24:08,895 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-22 21:24:08,992 INFO L282 CfgBuilder]: Performing block encoding [2023-11-22 21:24:09,076 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-22 21:24:09,076 INFO L309 CfgBuilder]: Removed 2 assume(true) statements. [2023-11-22 21:24:09,077 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 09:24:09 BoogieIcfgContainer [2023-11-22 21:24:09,077 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-22 21:24:09,078 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-22 21:24:09,079 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-22 21:24:09,085 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-22 21:24:09,085 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.11 09:24:08" (1/3) ... [2023-11-22 21:24:09,086 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7299af9b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 09:24:09, skipping insertion in model container [2023-11-22 21:24:09,086 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 09:24:08" (2/3) ... [2023-11-22 21:24:09,087 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7299af9b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 09:24:09, skipping insertion in model container [2023-11-22 21:24:09,088 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 09:24:09" (3/3) ... [2023-11-22 21:24:09,089 INFO L112 eAbstractionObserver]: Analyzing ICFG pthread-demo-datarace-1.i [2023-11-22 21:24:09,095 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-11-22 21:24:09,102 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-22 21:24:09,103 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-22 21:24:09,104 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-22 21:24:09,145 INFO L144 ThreadInstanceAdder]: Constructed 1 joinOtherThreadTransitions. [2023-11-22 21:24:09,168 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 25 places, 24 transitions, 55 flow [2023-11-22 21:24:09,186 INFO L124 PetriNetUnfolderBase]: 3/23 cut-off events. [2023-11-22 21:24:09,186 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-11-22 21:24:09,190 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28 conditions, 23 events. 3/23 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 32 event pairs, 0 based on Foata normal form. 0/19 useless extension candidates. Maximal degree in co-relation 14. Up to 2 conditions per place. [2023-11-22 21:24:09,190 INFO L82 GeneralOperation]: Start removeDead. Operand has 25 places, 24 transitions, 55 flow [2023-11-22 21:24:09,193 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 22 places, 20 transitions, 46 flow [2023-11-22 21:24:09,199 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-22 21:24:09,204 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=true, 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;@57fe1d96, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-22 21:24:09,205 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-11-22 21:24:09,210 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-22 21:24:09,210 INFO L124 PetriNetUnfolderBase]: 2/19 cut-off events. [2023-11-22 21:24:09,210 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-11-22 21:24:09,211 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-22 21:24:09,211 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-22 21:24:09,212 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-22 21:24:09,215 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 21:24:09,216 INFO L85 PathProgramCache]: Analyzing trace with hash -1428559675, now seen corresponding path program 1 times [2023-11-22 21:24:09,223 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 21:24:09,224 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [162393039] [2023-11-22 21:24:09,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 21:24:09,224 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 21:24:09,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:24:09,392 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-22 21:24:09,393 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 21:24:09,393 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [162393039] [2023-11-22 21:24:09,394 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [162393039] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-22 21:24:09,394 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-22 21:24:09,394 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-22 21:24:09,395 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [728300198] [2023-11-22 21:24:09,396 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-22 21:24:09,402 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-22 21:24:09,406 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 21:24:09,442 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-22 21:24:09,443 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-22 21:24:09,446 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 24 [2023-11-22 21:24:09,448 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 22 places, 20 transitions, 46 flow. Second operand has 3 states, 3 states have (on average 8.666666666666666) internal successors, (26), 3 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 21:24:09,448 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-22 21:24:09,448 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 24 [2023-11-22 21:24:09,449 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-22 21:24:09,504 INFO L124 PetriNetUnfolderBase]: 61/133 cut-off events. [2023-11-22 21:24:09,505 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-11-22 21:24:09,505 INFO L83 FinitePrefix]: Finished finitePrefix Result has 263 conditions, 133 events. 61/133 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 398 event pairs, 27 based on Foata normal form. 6/138 useless extension candidates. Maximal degree in co-relation 247. Up to 77 conditions per place. [2023-11-22 21:24:09,507 INFO L140 encePairwiseOnDemand]: 21/24 looper letters, 24 selfloop transitions, 2 changer transitions 0/30 dead transitions. [2023-11-22 21:24:09,507 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 24 places, 30 transitions, 118 flow [2023-11-22 21:24:09,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-22 21:24:09,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-22 21:24:09,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 45 transitions. [2023-11-22 21:24:09,515 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.625 [2023-11-22 21:24:09,516 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 45 transitions. [2023-11-22 21:24:09,516 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 45 transitions. [2023-11-22 21:24:09,516 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-22 21:24:09,518 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 45 transitions. [2023-11-22 21:24:09,519 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 15.0) internal successors, (45), 3 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) [2023-11-22 21:24:09,521 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 24.0) internal successors, (96), 4 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 21:24:09,521 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 24.0) internal successors, (96), 4 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 21:24:09,522 INFO L175 Difference]: Start difference. First operand has 22 places, 20 transitions, 46 flow. Second operand 3 states and 45 transitions. [2023-11-22 21:24:09,523 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 24 places, 30 transitions, 118 flow [2023-11-22 21:24:09,525 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 22 places, 30 transitions, 114 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-22 21:24:09,526 INFO L231 Difference]: Finished difference. Result has 23 places, 21 transitions, 54 flow [2023-11-22 21:24:09,527 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=24, PETRI_DIFFERENCE_MINUEND_FLOW=42, PETRI_DIFFERENCE_MINUEND_PLACES=20, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=20, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=18, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=54, PETRI_PLACES=23, PETRI_TRANSITIONS=21} [2023-11-22 21:24:09,530 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 1 predicate places. [2023-11-22 21:24:09,530 INFO L495 AbstractCegarLoop]: Abstraction has has 23 places, 21 transitions, 54 flow [2023-11-22 21:24:09,530 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 8.666666666666666) internal successors, (26), 3 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 21:24:09,530 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-22 21:24:09,530 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-22 21:24:09,531 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-22 21:24:09,531 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-22 21:24:09,531 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 21:24:09,531 INFO L85 PathProgramCache]: Analyzing trace with hash 186676813, now seen corresponding path program 1 times [2023-11-22 21:24:09,532 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 21:24:09,532 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1069000172] [2023-11-22 21:24:09,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 21:24:09,532 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 21:24:09,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:24:09,601 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-22 21:24:09,601 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 21:24:09,601 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1069000172] [2023-11-22 21:24:09,601 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1069000172] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-22 21:24:09,601 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-22 21:24:09,602 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-22 21:24:09,602 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1220256240] [2023-11-22 21:24:09,602 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-22 21:24:09,603 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-22 21:24:09,612 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 21:24:09,613 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-22 21:24:09,613 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-22 21:24:09,616 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 24 [2023-11-22 21:24:09,628 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 23 places, 21 transitions, 54 flow. Second operand has 3 states, 3 states have (on average 10.0) internal successors, (30), 3 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 21:24:09,628 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-22 21:24:09,628 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 24 [2023-11-22 21:24:09,628 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-22 21:24:09,734 INFO L124 PetriNetUnfolderBase]: 101/223 cut-off events. [2023-11-22 21:24:09,734 INFO L125 PetriNetUnfolderBase]: For 49/49 co-relation queries the response was YES. [2023-11-22 21:24:09,735 INFO L83 FinitePrefix]: Finished finitePrefix Result has 482 conditions, 223 events. 101/223 cut-off events. For 49/49 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 827 event pairs, 45 based on Foata normal form. 10/233 useless extension candidates. Maximal degree in co-relation 147. Up to 125 conditions per place. [2023-11-22 21:24:09,737 INFO L140 encePairwiseOnDemand]: 21/24 looper letters, 26 selfloop transitions, 2 changer transitions 0/32 dead transitions. [2023-11-22 21:24:09,737 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 25 places, 32 transitions, 142 flow [2023-11-22 21:24:09,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-22 21:24:09,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-22 21:24:09,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 45 transitions. [2023-11-22 21:24:09,739 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.625 [2023-11-22 21:24:09,739 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 45 transitions. [2023-11-22 21:24:09,739 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 45 transitions. [2023-11-22 21:24:09,739 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-22 21:24:09,739 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 45 transitions. [2023-11-22 21:24:09,740 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 15.0) internal successors, (45), 3 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) [2023-11-22 21:24:09,740 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 24.0) internal successors, (96), 4 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 21:24:09,740 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 24.0) internal successors, (96), 4 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 21:24:09,741 INFO L175 Difference]: Start difference. First operand has 23 places, 21 transitions, 54 flow. Second operand 3 states and 45 transitions. [2023-11-22 21:24:09,741 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 25 places, 32 transitions, 142 flow [2023-11-22 21:24:09,742 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 24 places, 32 transitions, 138 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-22 21:24:09,743 INFO L231 Difference]: Finished difference. Result has 25 places, 22 transitions, 64 flow [2023-11-22 21:24:09,743 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=24, PETRI_DIFFERENCE_MINUEND_FLOW=52, PETRI_DIFFERENCE_MINUEND_PLACES=22, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=21, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=64, PETRI_PLACES=25, PETRI_TRANSITIONS=22} [2023-11-22 21:24:09,743 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 3 predicate places. [2023-11-22 21:24:09,743 INFO L495 AbstractCegarLoop]: Abstraction has has 25 places, 22 transitions, 64 flow [2023-11-22 21:24:09,744 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 10.0) internal successors, (30), 3 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 21:24:09,744 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-22 21:24:09,744 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-22 21:24:09,744 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-22 21:24:09,744 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-22 21:24:09,745 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 21:24:09,745 INFO L85 PathProgramCache]: Analyzing trace with hash -791721388, now seen corresponding path program 1 times [2023-11-22 21:24:09,745 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 21:24:09,745 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1406664556] [2023-11-22 21:24:09,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 21:24:09,746 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 21:24:09,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:24:09,867 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-22 21:24:09,868 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 21:24:09,868 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1406664556] [2023-11-22 21:24:09,868 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1406664556] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-22 21:24:09,868 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-22 21:24:09,868 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-22 21:24:09,869 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [76104625] [2023-11-22 21:24:09,869 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-22 21:24:09,869 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-22 21:24:09,869 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 21:24:09,870 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-22 21:24:09,871 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-22 21:24:09,871 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 24 [2023-11-22 21:24:09,871 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 25 places, 22 transitions, 64 flow. Second operand has 3 states, 3 states have (on average 11.333333333333334) internal successors, (34), 3 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 21:24:09,871 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-22 21:24:09,872 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 24 [2023-11-22 21:24:09,872 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-22 21:24:09,926 INFO L124 PetriNetUnfolderBase]: 69/170 cut-off events. [2023-11-22 21:24:09,927 INFO L125 PetriNetUnfolderBase]: For 77/77 co-relation queries the response was YES. [2023-11-22 21:24:09,927 INFO L83 FinitePrefix]: Finished finitePrefix Result has 422 conditions, 170 events. 69/170 cut-off events. For 77/77 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 529 event pairs, 25 based on Foata normal form. 16/185 useless extension candidates. Maximal degree in co-relation 132. Up to 80 conditions per place. [2023-11-22 21:24:09,928 INFO L140 encePairwiseOnDemand]: 20/24 looper letters, 22 selfloop transitions, 4 changer transitions 0/30 dead transitions. [2023-11-22 21:24:09,929 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 27 places, 30 transitions, 150 flow [2023-11-22 21:24:09,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-22 21:24:09,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-22 21:24:09,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 42 transitions. [2023-11-22 21:24:09,932 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5833333333333334 [2023-11-22 21:24:09,932 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 42 transitions. [2023-11-22 21:24:09,932 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 42 transitions. [2023-11-22 21:24:09,932 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-22 21:24:09,932 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 42 transitions. [2023-11-22 21:24:09,933 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 14.0) internal successors, (42), 3 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 21:24:09,934 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 24.0) internal successors, (96), 4 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 21:24:09,935 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 24.0) internal successors, (96), 4 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 21:24:09,936 INFO L175 Difference]: Start difference. First operand has 25 places, 22 transitions, 64 flow. Second operand 3 states and 42 transitions. [2023-11-22 21:24:09,936 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 27 places, 30 transitions, 150 flow [2023-11-22 21:24:09,936 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 26 places, 30 transitions, 146 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-22 21:24:09,937 INFO L231 Difference]: Finished difference. Result has 26 places, 22 transitions, 70 flow [2023-11-22 21:24:09,938 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=24, PETRI_DIFFERENCE_MINUEND_FLOW=62, PETRI_DIFFERENCE_MINUEND_PLACES=24, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=22, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=18, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=70, PETRI_PLACES=26, PETRI_TRANSITIONS=22} [2023-11-22 21:24:09,938 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 4 predicate places. [2023-11-22 21:24:09,939 INFO L495 AbstractCegarLoop]: Abstraction has has 26 places, 22 transitions, 70 flow [2023-11-22 21:24:09,939 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 11.333333333333334) internal successors, (34), 3 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 21:24:09,939 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-22 21:24:09,939 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-22 21:24:09,939 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-22 21:24:09,939 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-22 21:24:09,940 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 21:24:09,940 INFO L85 PathProgramCache]: Analyzing trace with hash 1020515750, now seen corresponding path program 2 times [2023-11-22 21:24:09,940 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 21:24:09,941 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [94704481] [2023-11-22 21:24:09,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 21:24:09,941 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 21:24:09,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:24:10,010 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-22 21:24:10,011 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 21:24:10,011 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [94704481] [2023-11-22 21:24:10,011 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [94704481] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-22 21:24:10,014 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [355890232] [2023-11-22 21:24:10,014 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-22 21:24:10,015 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 21:24:10,015 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-22 21:24:10,021 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) [2023-11-22 21:24:10,040 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-22 21:24:10,101 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-22 21:24:10,102 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-22 21:24:10,103 INFO L262 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-22 21:24:10,107 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-22 21:24:10,150 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-22 21:24:10,150 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-22 21:24:10,187 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-22 21:24:10,187 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [355890232] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-22 21:24:10,188 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-22 21:24:10,188 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2023-11-22 21:24:10,188 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1272739436] [2023-11-22 21:24:10,188 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-22 21:24:10,189 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-22 21:24:10,190 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 21:24:10,191 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-22 21:24:10,192 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-11-22 21:24:10,195 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 24 [2023-11-22 21:24:10,196 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 26 places, 22 transitions, 70 flow. Second operand has 7 states, 7 states have (on average 10.571428571428571) internal successors, (74), 7 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 21:24:10,196 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-22 21:24:10,196 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 24 [2023-11-22 21:24:10,196 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-22 21:24:10,309 INFO L124 PetriNetUnfolderBase]: 167/374 cut-off events. [2023-11-22 21:24:10,309 INFO L125 PetriNetUnfolderBase]: For 159/159 co-relation queries the response was YES. [2023-11-22 21:24:10,312 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1008 conditions, 374 events. 167/374 cut-off events. For 159/159 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 1301 event pairs, 14 based on Foata normal form. 30/404 useless extension candidates. Maximal degree in co-relation 261. Up to 86 conditions per place. [2023-11-22 21:24:10,314 INFO L140 encePairwiseOnDemand]: 20/24 looper letters, 56 selfloop transitions, 6 changer transitions 0/65 dead transitions. [2023-11-22 21:24:10,314 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 31 places, 65 transitions, 344 flow [2023-11-22 21:24:10,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-22 21:24:10,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-22 21:24:10,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 90 transitions. [2023-11-22 21:24:10,317 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.625 [2023-11-22 21:24:10,317 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 90 transitions. [2023-11-22 21:24:10,317 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 90 transitions. [2023-11-22 21:24:10,317 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-22 21:24:10,317 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 90 transitions. [2023-11-22 21:24:10,319 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 15.0) internal successors, (90), 6 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 21:24:10,320 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 24.0) internal successors, (168), 7 states have internal predecessors, (168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 21:24:10,320 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 24.0) internal successors, (168), 7 states have internal predecessors, (168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 21:24:10,320 INFO L175 Difference]: Start difference. First operand has 26 places, 22 transitions, 70 flow. Second operand 6 states and 90 transitions. [2023-11-22 21:24:10,320 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 31 places, 65 transitions, 344 flow [2023-11-22 21:24:10,321 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 30 places, 65 transitions, 326 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-22 21:24:10,322 INFO L231 Difference]: Finished difference. Result has 34 places, 25 transitions, 106 flow [2023-11-22 21:24:10,323 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=24, PETRI_DIFFERENCE_MINUEND_FLOW=66, PETRI_DIFFERENCE_MINUEND_PLACES=25, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=22, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=18, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=106, PETRI_PLACES=34, PETRI_TRANSITIONS=25} [2023-11-22 21:24:10,324 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 12 predicate places. [2023-11-22 21:24:10,324 INFO L495 AbstractCegarLoop]: Abstraction has has 34 places, 25 transitions, 106 flow [2023-11-22 21:24:10,324 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.571428571428571) internal successors, (74), 7 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 21:24:10,325 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-22 21:24:10,325 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-22 21:24:10,338 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-11-22 21:24:10,536 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 21:24:10,537 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-22 21:24:10,537 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 21:24:10,537 INFO L85 PathProgramCache]: Analyzing trace with hash -660696479, now seen corresponding path program 3 times [2023-11-22 21:24:10,537 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 21:24:10,537 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [901573512] [2023-11-22 21:24:10,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 21:24:10,538 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 21:24:10,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:24:10,620 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-11-22 21:24:10,621 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 21:24:10,621 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [901573512] [2023-11-22 21:24:10,621 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [901573512] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-22 21:24:10,622 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1534933726] [2023-11-22 21:24:10,622 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-22 21:24:10,622 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 21:24:10,622 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-22 21:24:10,627 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) [2023-11-22 21:24:10,655 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-22 21:24:10,702 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-11-22 21:24:10,702 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-22 21:24:10,703 INFO L262 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-22 21:24:10,704 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-22 21:24:10,716 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-11-22 21:24:10,717 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-22 21:24:10,735 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-11-22 21:24:10,735 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1534933726] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-22 21:24:10,736 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-22 21:24:10,736 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2023-11-22 21:24:10,736 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1419903870] [2023-11-22 21:24:10,736 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-22 21:24:10,736 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-22 21:24:10,737 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 21:24:10,737 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-22 21:24:10,737 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-11-22 21:24:10,741 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 24 [2023-11-22 21:24:10,741 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 34 places, 25 transitions, 106 flow. Second operand has 7 states, 7 states have (on average 9.285714285714286) internal successors, (65), 7 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 21:24:10,741 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-22 21:24:10,741 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 24 [2023-11-22 21:24:10,741 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-22 21:24:10,845 INFO L124 PetriNetUnfolderBase]: 294/694 cut-off events. [2023-11-22 21:24:10,845 INFO L125 PetriNetUnfolderBase]: For 864/864 co-relation queries the response was YES. [2023-11-22 21:24:10,846 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2035 conditions, 694 events. 294/694 cut-off events. For 864/864 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 2891 event pairs, 51 based on Foata normal form. 57/751 useless extension candidates. Maximal degree in co-relation 1232. Up to 156 conditions per place. [2023-11-22 21:24:10,849 INFO L140 encePairwiseOnDemand]: 20/24 looper letters, 66 selfloop transitions, 6 changer transitions 0/76 dead transitions. [2023-11-22 21:24:10,849 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 39 places, 76 transitions, 514 flow [2023-11-22 21:24:10,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-22 21:24:10,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-22 21:24:10,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 90 transitions. [2023-11-22 21:24:10,850 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.625 [2023-11-22 21:24:10,850 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 90 transitions. [2023-11-22 21:24:10,851 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 90 transitions. [2023-11-22 21:24:10,851 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-22 21:24:10,851 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 90 transitions. [2023-11-22 21:24:10,851 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 15.0) internal successors, (90), 6 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 21:24:10,852 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 24.0) internal successors, (168), 7 states have internal predecessors, (168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 21:24:10,852 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 24.0) internal successors, (168), 7 states have internal predecessors, (168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 21:24:10,852 INFO L175 Difference]: Start difference. First operand has 34 places, 25 transitions, 106 flow. Second operand 6 states and 90 transitions. [2023-11-22 21:24:10,852 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 39 places, 76 transitions, 514 flow [2023-11-22 21:24:10,854 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 38 places, 76 transitions, 474 flow, removed 15 selfloop flow, removed 1 redundant places. [2023-11-22 21:24:10,855 INFO L231 Difference]: Finished difference. Result has 42 places, 28 transitions, 138 flow [2023-11-22 21:24:10,855 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=24, PETRI_DIFFERENCE_MINUEND_FLOW=98, PETRI_DIFFERENCE_MINUEND_PLACES=33, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=25, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=138, PETRI_PLACES=42, PETRI_TRANSITIONS=28} [2023-11-22 21:24:10,856 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 20 predicate places. [2023-11-22 21:24:10,856 INFO L495 AbstractCegarLoop]: Abstraction has has 42 places, 28 transitions, 138 flow [2023-11-22 21:24:10,856 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.285714285714286) internal successors, (65), 7 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 21:24:10,856 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-22 21:24:10,856 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-22 21:24:10,870 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-22 21:24:11,067 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 21:24:11,068 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-22 21:24:11,068 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 21:24:11,068 INFO L85 PathProgramCache]: Analyzing trace with hash 478578983, now seen corresponding path program 4 times [2023-11-22 21:24:11,068 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 21:24:11,068 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [486570196] [2023-11-22 21:24:11,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 21:24:11,069 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 21:24:11,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:24:11,183 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 4 proven. 46 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-11-22 21:24:11,184 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 21:24:11,184 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [486570196] [2023-11-22 21:24:11,184 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [486570196] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-22 21:24:11,184 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [606668318] [2023-11-22 21:24:11,184 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-22 21:24:11,184 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 21:24:11,185 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-22 21:24:11,185 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) [2023-11-22 21:24:11,187 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-22 21:24:11,282 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-22 21:24:11,283 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-22 21:24:11,284 INFO L262 TraceCheckSpWp]: Trace formula consists of 254 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-22 21:24:11,286 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-22 21:24:11,366 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 41 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2023-11-22 21:24:11,366 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-22 21:24:11,469 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 41 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2023-11-22 21:24:11,469 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [606668318] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-22 21:24:11,470 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-22 21:24:11,470 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 17 [2023-11-22 21:24:11,470 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1490419708] [2023-11-22 21:24:11,470 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-22 21:24:11,470 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-11-22 21:24:11,471 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 21:24:11,471 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-11-22 21:24:11,471 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=186, Unknown=0, NotChecked=0, Total=272 [2023-11-22 21:24:11,485 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 24 [2023-11-22 21:24:11,485 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 28 transitions, 138 flow. Second operand has 17 states, 17 states have (on average 10.294117647058824) internal successors, (175), 17 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 21:24:11,485 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-22 21:24:11,486 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 24 [2023-11-22 21:24:11,486 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-22 21:24:12,434 INFO L124 PetriNetUnfolderBase]: 899/2078 cut-off events. [2023-11-22 21:24:12,435 INFO L125 PetriNetUnfolderBase]: For 3911/3911 co-relation queries the response was YES. [2023-11-22 21:24:12,439 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6873 conditions, 2078 events. 899/2078 cut-off events. For 3911/3911 co-relation queries the response was YES. Maximal size of possible extension queue 33. Compared 10179 event pairs, 14 based on Foata normal form. 209/2287 useless extension candidates. Maximal degree in co-relation 3345. Up to 371 conditions per place. [2023-11-22 21:24:12,485 INFO L140 encePairwiseOnDemand]: 17/24 looper letters, 470 selfloop transitions, 138 changer transitions 0/612 dead transitions. [2023-11-22 21:24:12,486 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 108 places, 612 transitions, 3744 flow [2023-11-22 21:24:12,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2023-11-22 21:24:12,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2023-11-22 21:24:12,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 990 transitions. [2023-11-22 21:24:12,490 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6156716417910447 [2023-11-22 21:24:12,490 INFO L72 ComplementDD]: Start complementDD. Operand 67 states and 990 transitions. [2023-11-22 21:24:12,490 INFO L73 IsDeterministic]: Start isDeterministic. Operand 67 states and 990 transitions. [2023-11-22 21:24:12,491 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-22 21:24:12,491 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 67 states and 990 transitions. [2023-11-22 21:24:12,493 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 68 states, 67 states have (on average 14.776119402985074) internal successors, (990), 67 states have internal predecessors, (990), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 21:24:12,496 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 68 states, 68 states have (on average 24.0) internal successors, (1632), 68 states have internal predecessors, (1632), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 21:24:12,496 INFO L81 ComplementDD]: Finished complementDD. Result has 68 states, 68 states have (on average 24.0) internal successors, (1632), 68 states have internal predecessors, (1632), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 21:24:12,496 INFO L175 Difference]: Start difference. First operand has 42 places, 28 transitions, 138 flow. Second operand 67 states and 990 transitions. [2023-11-22 21:24:12,497 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 108 places, 612 transitions, 3744 flow [2023-11-22 21:24:12,503 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 107 places, 612 transitions, 3624 flow, removed 54 selfloop flow, removed 1 redundant places. [2023-11-22 21:24:12,507 INFO L231 Difference]: Finished difference. Result has 153 places, 167 transitions, 1564 flow [2023-11-22 21:24:12,507 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=24, PETRI_DIFFERENCE_MINUEND_FLOW=130, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=28, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=17, PETRI_DIFFERENCE_SUBTRAHEND_STATES=67, PETRI_FLOW=1564, PETRI_PLACES=153, PETRI_TRANSITIONS=167} [2023-11-22 21:24:12,508 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 131 predicate places. [2023-11-22 21:24:12,508 INFO L495 AbstractCegarLoop]: Abstraction has has 153 places, 167 transitions, 1564 flow [2023-11-22 21:24:12,508 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 10.294117647058824) internal successors, (175), 17 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 21:24:12,508 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-22 21:24:12,508 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 10, 10, 10, 10, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-22 21:24:12,522 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-22 21:24:12,719 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 21:24:12,720 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-22 21:24:12,720 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 21:24:12,720 INFO L85 PathProgramCache]: Analyzing trace with hash 914665606, now seen corresponding path program 5 times [2023-11-22 21:24:12,721 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 21:24:12,721 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1850498762] [2023-11-22 21:24:12,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 21:24:12,721 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 21:24:12,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:24:12,860 INFO L134 CoverageAnalysis]: Checked inductivity of 290 backedges. 10 proven. 55 refuted. 0 times theorem prover too weak. 225 trivial. 0 not checked. [2023-11-22 21:24:12,860 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 21:24:12,860 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1850498762] [2023-11-22 21:24:12,860 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1850498762] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-22 21:24:12,860 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1028065146] [2023-11-22 21:24:12,860 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-22 21:24:12,861 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 21:24:12,861 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-22 21:24:12,862 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) [2023-11-22 21:24:12,889 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-22 21:24:12,980 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2023-11-22 21:24:12,980 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-22 21:24:12,982 INFO L262 TraceCheckSpWp]: Trace formula consists of 389 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-22 21:24:12,984 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-22 21:24:13,051 INFO L134 CoverageAnalysis]: Checked inductivity of 290 backedges. 10 proven. 55 refuted. 0 times theorem prover too weak. 225 trivial. 0 not checked. [2023-11-22 21:24:13,052 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-22 21:24:13,153 INFO L134 CoverageAnalysis]: Checked inductivity of 290 backedges. 10 proven. 55 refuted. 0 times theorem prover too weak. 225 trivial. 0 not checked. [2023-11-22 21:24:13,153 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1028065146] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-22 21:24:13,153 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-22 21:24:13,153 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 15 [2023-11-22 21:24:13,153 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [914904068] [2023-11-22 21:24:13,154 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-22 21:24:13,154 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-11-22 21:24:13,154 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 21:24:13,155 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-11-22 21:24:13,155 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2023-11-22 21:24:13,161 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 24 [2023-11-22 21:24:13,161 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 153 places, 167 transitions, 1564 flow. Second operand has 15 states, 15 states have (on average 10.0) internal successors, (150), 15 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 21:24:13,162 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-22 21:24:13,162 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 24 [2023-11-22 21:24:13,162 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-22 21:24:13,930 INFO L124 PetriNetUnfolderBase]: 1737/4098 cut-off events. [2023-11-22 21:24:13,930 INFO L125 PetriNetUnfolderBase]: For 95207/95207 co-relation queries the response was YES. [2023-11-22 21:24:13,945 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18137 conditions, 4098 events. 1737/4098 cut-off events. For 95207/95207 co-relation queries the response was YES. Maximal size of possible extension queue 54. Compared 22982 event pairs, 166 based on Foata normal form. 301/4389 useless extension candidates. Maximal degree in co-relation 16184. Up to 693 conditions per place. [2023-11-22 21:24:13,964 INFO L140 encePairwiseOnDemand]: 20/24 looper letters, 248 selfloop transitions, 144 changer transitions 0/402 dead transitions. [2023-11-22 21:24:13,964 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 166 places, 402 transitions, 4818 flow [2023-11-22 21:24:13,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-11-22 21:24:13,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-11-22 21:24:13,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 222 transitions. [2023-11-22 21:24:13,966 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6607142857142857 [2023-11-22 21:24:13,966 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 222 transitions. [2023-11-22 21:24:13,966 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 222 transitions. [2023-11-22 21:24:13,966 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-22 21:24:13,966 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 222 transitions. [2023-11-22 21:24:13,967 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 15.857142857142858) internal successors, (222), 14 states have internal predecessors, (222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 21:24:13,968 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 24.0) internal successors, (360), 15 states have internal predecessors, (360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 21:24:13,968 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 24.0) internal successors, (360), 15 states have internal predecessors, (360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 21:24:13,968 INFO L175 Difference]: Start difference. First operand has 153 places, 167 transitions, 1564 flow. Second operand 14 states and 222 transitions. [2023-11-22 21:24:13,968 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 166 places, 402 transitions, 4818 flow [2023-11-22 21:24:14,090 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 160 places, 402 transitions, 4674 flow, removed 0 selfloop flow, removed 6 redundant places. [2023-11-22 21:24:14,094 INFO L231 Difference]: Finished difference. Result has 168 places, 234 transitions, 2478 flow [2023-11-22 21:24:14,095 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=24, PETRI_DIFFERENCE_MINUEND_FLOW=1462, PETRI_DIFFERENCE_MINUEND_PLACES=147, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=167, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=77, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=89, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=2478, PETRI_PLACES=168, PETRI_TRANSITIONS=234} [2023-11-22 21:24:14,095 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 146 predicate places. [2023-11-22 21:24:14,095 INFO L495 AbstractCegarLoop]: Abstraction has has 168 places, 234 transitions, 2478 flow [2023-11-22 21:24:14,096 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 10.0) internal successors, (150), 15 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 21:24:14,096 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-22 21:24:14,096 INFO L208 CegarLoopForPetriNet]: trace histogram [12, 12, 12, 12, 12, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-22 21:24:14,110 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-11-22 21:24:14,307 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 21:24:14,308 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-22 21:24:14,308 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 21:24:14,308 INFO L85 PathProgramCache]: Analyzing trace with hash 1025122131, now seen corresponding path program 6 times [2023-11-22 21:24:14,308 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 21:24:14,308 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1853947635] [2023-11-22 21:24:14,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 21:24:14,308 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 21:24:14,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:24:14,653 INFO L134 CoverageAnalysis]: Checked inductivity of 577 backedges. 0 proven. 342 refuted. 0 times theorem prover too weak. 235 trivial. 0 not checked. [2023-11-22 21:24:14,653 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 21:24:14,653 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1853947635] [2023-11-22 21:24:14,654 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1853947635] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-22 21:24:14,655 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1678784117] [2023-11-22 21:24:14,656 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-22 21:24:14,656 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 21:24:14,656 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-22 21:24:14,657 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) [2023-11-22 21:24:14,680 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-22 21:24:14,884 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2023-11-22 21:24:14,884 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-22 21:24:14,886 INFO L262 TraceCheckSpWp]: Trace formula consists of 536 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-22 21:24:14,889 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-22 21:24:15,042 INFO L134 CoverageAnalysis]: Checked inductivity of 577 backedges. 12 proven. 235 refuted. 0 times theorem prover too weak. 330 trivial. 0 not checked. [2023-11-22 21:24:15,042 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-22 21:24:15,251 INFO L134 CoverageAnalysis]: Checked inductivity of 577 backedges. 12 proven. 235 refuted. 0 times theorem prover too weak. 330 trivial. 0 not checked. [2023-11-22 21:24:15,251 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1678784117] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-22 21:24:15,251 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-22 21:24:15,251 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13, 13] total 35 [2023-11-22 21:24:15,251 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1409775679] [2023-11-22 21:24:15,252 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-22 21:24:15,252 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2023-11-22 21:24:15,253 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 21:24:15,253 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2023-11-22 21:24:15,253 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=335, Invalid=855, Unknown=0, NotChecked=0, Total=1190 [2023-11-22 21:24:15,270 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 24 [2023-11-22 21:24:15,270 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 168 places, 234 transitions, 2478 flow. Second operand has 35 states, 35 states have (on average 9.742857142857142) internal successors, (341), 35 states have internal predecessors, (341), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 21:24:15,270 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-22 21:24:15,270 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 24 [2023-11-22 21:24:15,270 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-22 21:24:26,004 INFO L124 PetriNetUnfolderBase]: 3735/8734 cut-off events. [2023-11-22 21:24:26,005 INFO L125 PetriNetUnfolderBase]: For 539787/539787 co-relation queries the response was YES. [2023-11-22 21:24:26,036 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41311 conditions, 8734 events. 3735/8734 cut-off events. For 539787/539787 co-relation queries the response was YES. Maximal size of possible extension queue 73. Compared 53725 event pairs, 12 based on Foata normal form. 683/9417 useless extension candidates. Maximal degree in co-relation 37090. Up to 1545 conditions per place. [2023-11-22 21:24:26,072 INFO L140 encePairwiseOnDemand]: 17/24 looper letters, 2072 selfloop transitions, 742 changer transitions 0/2819 dead transitions. [2023-11-22 21:24:26,072 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 462 places, 2819 transitions, 23814 flow [2023-11-22 21:24:26,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 295 states. [2023-11-22 21:24:26,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 295 states. [2023-11-22 21:24:26,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 295 states to 295 states and 4300 transitions. [2023-11-22 21:24:26,089 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6073446327683616 [2023-11-22 21:24:26,089 INFO L72 ComplementDD]: Start complementDD. Operand 295 states and 4300 transitions. [2023-11-22 21:24:26,090 INFO L73 IsDeterministic]: Start isDeterministic. Operand 295 states and 4300 transitions. [2023-11-22 21:24:26,094 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-22 21:24:26,094 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 295 states and 4300 transitions. [2023-11-22 21:24:26,103 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 296 states, 295 states have (on average 14.576271186440678) internal successors, (4300), 295 states have internal predecessors, (4300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 21:24:26,122 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 296 states, 296 states have (on average 24.0) internal successors, (7104), 296 states have internal predecessors, (7104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 21:24:26,123 INFO L81 ComplementDD]: Finished complementDD. Result has 296 states, 296 states have (on average 24.0) internal successors, (7104), 296 states have internal predecessors, (7104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 21:24:26,124 INFO L175 Difference]: Start difference. First operand has 168 places, 234 transitions, 2478 flow. Second operand 295 states and 4300 transitions. [2023-11-22 21:24:26,124 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 462 places, 2819 transitions, 23814 flow [2023-11-22 21:24:26,369 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 457 places, 2819 transitions, 23504 flow, removed 0 selfloop flow, removed 5 redundant places. [2023-11-22 21:24:26,387 INFO L231 Difference]: Finished difference. Result has 621 places, 798 transitions, 11120 flow [2023-11-22 21:24:26,387 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=24, PETRI_DIFFERENCE_MINUEND_FLOW=2368, PETRI_DIFFERENCE_MINUEND_PLACES=163, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=234, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=209, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=295, PETRI_FLOW=11120, PETRI_PLACES=621, PETRI_TRANSITIONS=798} [2023-11-22 21:24:26,388 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 599 predicate places. [2023-11-22 21:24:26,388 INFO L495 AbstractCegarLoop]: Abstraction has has 621 places, 798 transitions, 11120 flow [2023-11-22 21:24:26,388 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 9.742857142857142) internal successors, (341), 35 states have internal predecessors, (341), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 21:24:26,388 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-22 21:24:26,389 INFO L208 CegarLoopForPetriNet]: trace histogram [20, 20, 20, 20, 20, 13, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-22 21:24:26,404 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-22 21:24:26,604 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 [2023-11-22 21:24:26,607 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-22 21:24:26,607 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 21:24:26,607 INFO L85 PathProgramCache]: Analyzing trace with hash 1474069254, now seen corresponding path program 7 times [2023-11-22 21:24:26,607 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 21:24:26,607 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1012937985] [2023-11-22 21:24:26,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 21:24:26,607 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 21:24:26,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:24:27,047 INFO L134 CoverageAnalysis]: Checked inductivity of 1373 backedges. 20 proven. 403 refuted. 0 times theorem prover too weak. 950 trivial. 0 not checked. [2023-11-22 21:24:27,047 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 21:24:27,048 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1012937985] [2023-11-22 21:24:27,048 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1012937985] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-22 21:24:27,048 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1277647457] [2023-11-22 21:24:27,048 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-22 21:24:27,048 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 21:24:27,048 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-22 21:24:27,049 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) [2023-11-22 21:24:27,050 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-22 21:24:27,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:24:27,230 INFO L262 TraceCheckSpWp]: Trace formula consists of 747 conjuncts, 15 conjunts are in the unsatisfiable core [2023-11-22 21:24:27,239 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-22 21:24:27,349 INFO L134 CoverageAnalysis]: Checked inductivity of 1373 backedges. 20 proven. 403 refuted. 0 times theorem prover too weak. 950 trivial. 0 not checked. [2023-11-22 21:24:27,350 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-22 21:24:27,598 INFO L134 CoverageAnalysis]: Checked inductivity of 1373 backedges. 20 proven. 403 refuted. 0 times theorem prover too weak. 950 trivial. 0 not checked. [2023-11-22 21:24:27,599 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1277647457] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-22 21:24:27,599 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-22 21:24:27,599 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 23 [2023-11-22 21:24:27,599 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1723088495] [2023-11-22 21:24:27,599 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-22 21:24:27,599 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-11-22 21:24:27,600 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 21:24:27,600 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-11-22 21:24:27,600 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2023-11-22 21:24:27,621 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 24 [2023-11-22 21:24:27,621 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 621 places, 798 transitions, 11120 flow. Second operand has 23 states, 23 states have (on average 10.217391304347826) internal successors, (235), 23 states have internal predecessors, (235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 21:24:27,621 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-22 21:24:27,624 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 24 [2023-11-22 21:24:27,624 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-22 21:24:33,382 INFO L124 PetriNetUnfolderBase]: 5495/13508 cut-off events. [2023-11-22 21:24:33,383 INFO L125 PetriNetUnfolderBase]: For 2387531/2387531 co-relation queries the response was YES. [2023-11-22 21:24:33,542 INFO L83 FinitePrefix]: Finished finitePrefix Result has 84423 conditions, 13508 events. 5495/13508 cut-off events. For 2387531/2387531 co-relation queries the response was YES. Maximal size of possible extension queue 102. Compared 91175 event pairs, 300 based on Foata normal form. 651/14136 useless extension candidates. Maximal degree in co-relation 78065. Up to 2288 conditions per place. [2023-11-22 21:24:33,597 INFO L140 encePairwiseOnDemand]: 20/24 looper letters, 610 selfloop transitions, 652 changer transitions 0/1286 dead transitions. [2023-11-22 21:24:33,597 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 642 places, 1286 transitions, 25768 flow [2023-11-22 21:24:33,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-11-22 21:24:33,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2023-11-22 21:24:33,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 350 transitions. [2023-11-22 21:24:33,599 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6628787878787878 [2023-11-22 21:24:33,599 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 350 transitions. [2023-11-22 21:24:33,599 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 350 transitions. [2023-11-22 21:24:33,599 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-22 21:24:33,599 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 350 transitions. [2023-11-22 21:24:33,600 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 23 states, 22 states have (on average 15.909090909090908) internal successors, (350), 22 states have internal predecessors, (350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 21:24:33,600 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 23 states, 23 states have (on average 24.0) internal successors, (552), 23 states have internal predecessors, (552), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 21:24:33,601 INFO L81 ComplementDD]: Finished complementDD. Result has 23 states, 23 states have (on average 24.0) internal successors, (552), 23 states have internal predecessors, (552), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 21:24:33,601 INFO L175 Difference]: Start difference. First operand has 621 places, 798 transitions, 11120 flow. Second operand 22 states and 350 transitions. [2023-11-22 21:24:33,601 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 642 places, 1286 transitions, 25768 flow [2023-11-22 21:24:38,520 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 582 places, 1286 transitions, 24580 flow, removed 165 selfloop flow, removed 60 redundant places. [2023-11-22 21:24:38,540 INFO L231 Difference]: Finished difference. Result has 590 places, 985 transitions, 14490 flow [2023-11-22 21:24:38,541 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=24, PETRI_DIFFERENCE_MINUEND_FLOW=10190, PETRI_DIFFERENCE_MINUEND_PLACES=561, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=798, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=465, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=332, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=14490, PETRI_PLACES=590, PETRI_TRANSITIONS=985} [2023-11-22 21:24:38,541 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 568 predicate places. [2023-11-22 21:24:38,541 INFO L495 AbstractCegarLoop]: Abstraction has has 590 places, 985 transitions, 14490 flow [2023-11-22 21:24:38,542 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 10.217391304347826) internal successors, (235), 23 states have internal predecessors, (235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 21:24:38,542 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-22 21:24:38,542 INFO L208 CegarLoopForPetriNet]: trace histogram [20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-22 21:24:38,556 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-22 21:24:38,742 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 [2023-11-22 21:24:38,743 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-22 21:24:38,743 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 21:24:38,743 INFO L85 PathProgramCache]: Analyzing trace with hash -1621672001, now seen corresponding path program 8 times [2023-11-22 21:24:38,743 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 21:24:38,743 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [460014509] [2023-11-22 21:24:38,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 21:24:38,744 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 21:24:38,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:24:40,852 INFO L134 CoverageAnalysis]: Checked inductivity of 1940 backedges. 0 proven. 1940 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-22 21:24:40,853 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 21:24:40,853 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [460014509] [2023-11-22 21:24:40,853 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [460014509] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-22 21:24:40,853 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [611446254] [2023-11-22 21:24:40,853 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-22 21:24:40,853 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 21:24:40,854 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-22 21:24:40,854 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) [2023-11-22 21:24:40,855 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-22 21:24:41,060 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-22 21:24:41,061 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-22 21:24:41,064 INFO L262 TraceCheckSpWp]: Trace formula consists of 894 conjuncts, 125 conjunts are in the unsatisfiable core [2023-11-22 21:24:41,068 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-22 21:24:41,272 INFO L134 CoverageAnalysis]: Checked inductivity of 1940 backedges. 0 proven. 1940 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-22 21:24:41,272 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-22 21:24:41,494 INFO L134 CoverageAnalysis]: Checked inductivity of 1940 backedges. 0 proven. 1940 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-22 21:24:41,494 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [611446254] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-22 21:24:41,494 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-22 21:24:41,494 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 43, 43] total 44 [2023-11-22 21:24:41,496 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [458494924] [2023-11-22 21:24:41,496 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-22 21:24:41,498 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2023-11-22 21:24:41,499 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 21:24:41,499 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2023-11-22 21:24:41,500 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=1892, Unknown=0, NotChecked=0, Total=1980 [2023-11-22 21:24:41,519 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 24 [2023-11-22 21:24:41,520 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 590 places, 985 transitions, 14490 flow. Second operand has 45 states, 45 states have (on average 7.8) internal successors, (351), 45 states have internal predecessors, (351), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 21:24:41,520 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-22 21:24:41,520 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 24 [2023-11-22 21:24:41,520 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-22 21:24:59,833 INFO L124 PetriNetUnfolderBase]: 9790/24712 cut-off events. [2023-11-22 21:24:59,834 INFO L125 PetriNetUnfolderBase]: For 17335124/17335124 co-relation queries the response was YES. [2023-11-22 21:25:00,235 INFO L83 FinitePrefix]: Finished finitePrefix Result has 352655 conditions, 24712 events. 9790/24712 cut-off events. For 17335124/17335124 co-relation queries the response was YES. Maximal size of possible extension queue 203. Compared 195606 event pairs, 1193 based on Foata normal form. 1/24713 useless extension candidates. Maximal degree in co-relation 332853. Up to 4646 conditions per place. [2023-11-22 21:25:00,532 INFO L140 encePairwiseOnDemand]: 19/24 looper letters, 3223 selfloop transitions, 83 changer transitions 2/3335 dead transitions. [2023-11-22 21:25:00,532 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 633 places, 3335 transitions, 60593 flow [2023-11-22 21:25:00,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2023-11-22 21:25:00,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2023-11-22 21:25:00,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 644 transitions. [2023-11-22 21:25:00,533 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6098484848484849 [2023-11-22 21:25:00,533 INFO L72 ComplementDD]: Start complementDD. Operand 44 states and 644 transitions. [2023-11-22 21:25:00,533 INFO L73 IsDeterministic]: Start isDeterministic. Operand 44 states and 644 transitions. [2023-11-22 21:25:00,533 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-22 21:25:00,533 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 44 states and 644 transitions. [2023-11-22 21:25:00,534 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 45 states, 44 states have (on average 14.636363636363637) internal successors, (644), 44 states have internal predecessors, (644), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 21:25:00,535 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 45 states, 45 states have (on average 24.0) internal successors, (1080), 45 states have internal predecessors, (1080), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 21:25:00,535 INFO L81 ComplementDD]: Finished complementDD. Result has 45 states, 45 states have (on average 24.0) internal successors, (1080), 45 states have internal predecessors, (1080), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 21:25:00,535 INFO L175 Difference]: Start difference. First operand has 590 places, 985 transitions, 14490 flow. Second operand 44 states and 644 transitions. [2023-11-22 21:25:00,535 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 633 places, 3335 transitions, 60593 flow [2023-11-22 21:26:07,812 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 620 places, 3335 transitions, 58487 flow, removed 0 selfloop flow, removed 13 redundant places. [2023-11-22 21:26:07,841 INFO L231 Difference]: Finished difference. Result has 622 places, 1067 transitions, 14026 flow [2023-11-22 21:26:07,842 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=24, PETRI_DIFFERENCE_MINUEND_FLOW=13684, PETRI_DIFFERENCE_MINUEND_PLACES=577, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=985, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=982, PETRI_DIFFERENCE_SUBTRAHEND_STATES=44, PETRI_FLOW=14026, PETRI_PLACES=622, PETRI_TRANSITIONS=1067} [2023-11-22 21:26:07,843 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 600 predicate places. [2023-11-22 21:26:07,843 INFO L495 AbstractCegarLoop]: Abstraction has has 622 places, 1067 transitions, 14026 flow [2023-11-22 21:26:07,843 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 7.8) internal successors, (351), 45 states have internal predecessors, (351), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 21:26:07,843 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-22 21:26:07,844 INFO L208 CegarLoopForPetriNet]: trace histogram [21, 21, 21, 21, 21, 20, 20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-22 21:26:07,857 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-11-22 21:26:08,044 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 21:26:08,045 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-22 21:26:08,045 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 21:26:08,045 INFO L85 PathProgramCache]: Analyzing trace with hash -1629730135, now seen corresponding path program 9 times [2023-11-22 21:26:08,045 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 21:26:08,045 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1148715396] [2023-11-22 21:26:08,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 21:26:08,045 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 21:26:08,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:26:08,581 INFO L134 CoverageAnalysis]: Checked inductivity of 2041 backedges. 975 proven. 116 refuted. 0 times theorem prover too weak. 950 trivial. 0 not checked. [2023-11-22 21:26:08,581 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 21:26:08,581 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1148715396] [2023-11-22 21:26:08,581 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1148715396] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-22 21:26:08,581 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [211910638] [2023-11-22 21:26:08,582 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-22 21:26:08,582 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 21:26:08,582 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-22 21:26:08,587 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-22 21:26:08,588 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-22 21:26:09,062 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 22 check-sat command(s) [2023-11-22 21:26:09,063 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-22 21:26:09,066 INFO L262 TraceCheckSpWp]: Trace formula consists of 892 conjuncts, 22 conjunts are in the unsatisfiable core [2023-11-22 21:26:09,069 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-22 21:26:09,260 INFO L134 CoverageAnalysis]: Checked inductivity of 2041 backedges. 1091 proven. 0 refuted. 0 times theorem prover too weak. 950 trivial. 0 not checked. [2023-11-22 21:26:09,260 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-22 21:26:09,261 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [211910638] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-22 21:26:09,261 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-22 21:26:09,261 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [23] total 24 [2023-11-22 21:26:09,261 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [605281408] [2023-11-22 21:26:09,261 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-22 21:26:09,262 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-11-22 21:26:09,262 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 21:26:09,262 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-11-22 21:26:09,263 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=256, Invalid=296, Unknown=0, NotChecked=0, Total=552 [2023-11-22 21:26:09,274 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 24 [2023-11-22 21:26:09,275 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 622 places, 1067 transitions, 14026 flow. Second operand has 23 states, 23 states have (on average 10.08695652173913) internal successors, (232), 23 states have internal predecessors, (232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 21:26:09,275 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-22 21:26:09,275 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 24 [2023-11-22 21:26:09,275 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-22 21:26:18,646 INFO L124 PetriNetUnfolderBase]: 9149/21080 cut-off events. [2023-11-22 21:26:18,647 INFO L125 PetriNetUnfolderBase]: For 3106188/3106188 co-relation queries the response was YES. [2023-11-22 21:26:19,858 INFO L83 FinitePrefix]: Finished finitePrefix Result has 183763 conditions, 21080 events. 9149/21080 cut-off events. For 3106188/3106188 co-relation queries the response was YES. Maximal size of possible extension queue 125. Compared 157395 event pairs, 155 based on Foata normal form. 89/21169 useless extension candidates. Maximal degree in co-relation 183518. Up to 4121 conditions per place.