./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/weaver/mult-dist.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 7724a2de 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/weaver/mult-dist.wvr.c -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 c31f1603fd15e011308b2e8fcd1cd45b23f0b00ac0b8b466c4f212460081639c --- Real Ultimate output --- This is Ultimate 0.2.4-tmp.fs.goblint-validation-7724a2d-m [2024-06-27 16:41:56,741 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-27 16:41:56,820 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-27 16:41:56,825 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-27 16:41:56,825 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-27 16:41:56,854 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-27 16:41:56,855 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-27 16:41:56,855 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-27 16:41:56,855 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-27 16:41:56,856 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-27 16:41:56,856 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-27 16:41:56,856 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-27 16:41:56,857 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-27 16:41:56,857 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-27 16:41:56,857 INFO L153 SettingsManager]: * Use SBE=true [2024-06-27 16:41:56,858 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-27 16:41:56,858 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-27 16:41:56,858 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-27 16:41:56,858 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-27 16:41:56,859 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-27 16:41:56,859 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-27 16:41:56,860 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-27 16:41:56,860 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-27 16:41:56,860 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-27 16:41:56,861 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-27 16:41:56,861 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-27 16:41:56,861 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-27 16:41:56,861 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-27 16:41:56,861 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-27 16:41:56,862 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-27 16:41:56,862 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-27 16:41:56,862 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-27 16:41:56,863 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-27 16:41:56,863 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-27 16:41:56,863 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-27 16:41:56,863 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-27 16:41:56,863 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-27 16:41:56,864 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-27 16:41:56,864 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-27 16:41:56,864 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-27 16:41:56,864 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-27 16:41:56,864 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-27 16:41:56,865 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-27 16:41:56,865 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c31f1603fd15e011308b2e8fcd1cd45b23f0b00ac0b8b466c4f212460081639c [2024-06-27 16:41:57,073 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-27 16:41:57,094 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-27 16:41:57,096 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-27 16:41:57,096 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-27 16:41:57,097 INFO L274 PluginConnector]: CDTParser initialized [2024-06-27 16:41:57,098 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/mult-dist.wvr.c [2024-06-27 16:41:58,087 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-27 16:41:58,229 INFO L384 CDTParser]: Found 1 translation units. [2024-06-27 16:41:58,230 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/mult-dist.wvr.c [2024-06-27 16:41:58,236 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f3c800be3/eeea62a28343441fbad74489ebdd1379/FLAG6e347d0e6 [2024-06-27 16:41:58,256 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f3c800be3/eeea62a28343441fbad74489ebdd1379 [2024-06-27 16:41:58,259 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-27 16:41:58,260 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-06-27 16:41:58,261 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-27 16:41:58,261 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-27 16:41:58,267 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-27 16:41:58,269 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.06 04:41:58" (1/1) ... [2024-06-27 16:41:58,270 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@67bd7eac and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 04:41:58, skipping insertion in model container [2024-06-27 16:41:58,270 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.06 04:41:58" (1/1) ... [2024-06-27 16:41:58,289 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-27 16:41:58,456 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/mult-dist.wvr.c[2155,2168] [2024-06-27 16:41:58,460 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-27 16:41:58,466 INFO L202 MainTranslator]: Completed pre-run [2024-06-27 16:41:58,496 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/mult-dist.wvr.c[2155,2168] [2024-06-27 16:41:58,497 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-27 16:41:58,510 INFO L206 MainTranslator]: Completed translation [2024-06-27 16:41:58,510 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 04:41:58 WrapperNode [2024-06-27 16:41:58,510 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-27 16:41:58,512 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-27 16:41:58,512 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-27 16:41:58,512 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-27 16:41:58,518 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 04:41:58" (1/1) ... [2024-06-27 16:41:58,525 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 04:41:58" (1/1) ... [2024-06-27 16:41:58,543 INFO L138 Inliner]: procedures = 21, calls = 10, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 54 [2024-06-27 16:41:58,544 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-27 16:41:58,544 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-27 16:41:58,544 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-27 16:41:58,544 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-27 16:41:58,553 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 04:41:58" (1/1) ... [2024-06-27 16:41:58,553 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 04:41:58" (1/1) ... [2024-06-27 16:41:58,555 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 04:41:58" (1/1) ... [2024-06-27 16:41:58,576 INFO L175 MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0]. [2024-06-27 16:41:58,577 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 04:41:58" (1/1) ... [2024-06-27 16:41:58,577 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 04:41:58" (1/1) ... [2024-06-27 16:41:58,584 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 04:41:58" (1/1) ... [2024-06-27 16:41:58,587 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 04:41:58" (1/1) ... [2024-06-27 16:41:58,590 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 04:41:58" (1/1) ... [2024-06-27 16:41:58,591 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 04:41:58" (1/1) ... [2024-06-27 16:41:58,594 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-27 16:41:58,595 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-27 16:41:58,595 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-27 16:41:58,595 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-27 16:41:58,596 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 04:41:58" (1/1) ... [2024-06-27 16:41:58,600 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-27 16:41:58,608 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 16:41:58,650 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-06-27 16:41:58,687 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-06-27 16:41:58,722 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-27 16:41:58,723 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-06-27 16:41:58,723 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-06-27 16:41:58,723 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-06-27 16:41:58,723 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-06-27 16:41:58,723 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2024-06-27 16:41:58,723 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2024-06-27 16:41:58,725 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-27 16:41:58,725 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-27 16:41:58,725 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-27 16:41:58,735 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-06-27 16:41:58,802 INFO L244 CfgBuilder]: Building ICFG [2024-06-27 16:41:58,804 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-27 16:41:58,975 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-27 16:41:58,976 INFO L293 CfgBuilder]: Performing block encoding [2024-06-27 16:41:59,111 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-27 16:41:59,111 INFO L320 CfgBuilder]: Removed 3 assume(true) statements. [2024-06-27 16:41:59,112 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.06 04:41:59 BoogieIcfgContainer [2024-06-27 16:41:59,112 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-27 16:41:59,113 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-27 16:41:59,113 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-27 16:41:59,116 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-27 16:41:59,116 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.06 04:41:58" (1/3) ... [2024-06-27 16:41:59,116 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@62490bb5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.06 04:41:59, skipping insertion in model container [2024-06-27 16:41:59,116 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 04:41:58" (2/3) ... [2024-06-27 16:41:59,117 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@62490bb5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.06 04:41:59, skipping insertion in model container [2024-06-27 16:41:59,117 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.06 04:41:59" (3/3) ... [2024-06-27 16:41:59,119 INFO L112 eAbstractionObserver]: Analyzing ICFG mult-dist.wvr.c [2024-06-27 16:41:59,126 WARN L146 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2024-06-27 16:41:59,134 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-27 16:41:59,134 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-06-27 16:41:59,134 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-27 16:41:59,167 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2024-06-27 16:41:59,190 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 32 places, 25 transitions, 71 flow [2024-06-27 16:41:59,208 INFO L124 PetriNetUnfolderBase]: 3/22 cut-off events. [2024-06-27 16:41:59,209 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2024-06-27 16:41:59,211 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35 conditions, 22 events. 3/22 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 2. Compared 13 event pairs, 0 based on Foata normal form. 0/18 useless extension candidates. Maximal degree in co-relation 18. Up to 2 conditions per place. [2024-06-27 16:41:59,211 INFO L82 GeneralOperation]: Start removeDead. Operand has 32 places, 25 transitions, 71 flow [2024-06-27 16:41:59,213 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 28 places, 21 transitions, 60 flow [2024-06-27 16:41:59,220 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-27 16:41:59,224 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;@4ed0f0d2, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-27 16:41:59,225 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2024-06-27 16:41:59,232 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-27 16:41:59,232 INFO L124 PetriNetUnfolderBase]: 3/20 cut-off events. [2024-06-27 16:41:59,232 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2024-06-27 16:41:59,232 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:41:59,233 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 16:41:59,233 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-27 16:41:59,237 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:41:59,239 INFO L85 PathProgramCache]: Analyzing trace with hash 329837544, now seen corresponding path program 1 times [2024-06-27 16:41:59,249 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:41:59,250 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1873248755] [2024-06-27 16:41:59,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:41:59,250 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:41:59,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:41:59,764 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 16:41:59,765 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:41:59,765 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1873248755] [2024-06-27 16:41:59,766 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1873248755] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 16:41:59,766 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 16:41:59,766 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-27 16:41:59,767 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [573167212] [2024-06-27 16:41:59,768 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 16:41:59,774 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-27 16:41:59,778 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:41:59,797 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-27 16:41:59,798 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-27 16:41:59,799 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 25 [2024-06-27 16:41:59,801 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 28 places, 21 transitions, 60 flow. Second operand has 3 states, 3 states have (on average 9.666666666666666) internal successors, (29), 3 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:41:59,801 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:41:59,801 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 25 [2024-06-27 16:41:59,802 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:41:59,955 INFO L124 PetriNetUnfolderBase]: 386/565 cut-off events. [2024-06-27 16:41:59,955 INFO L125 PetriNetUnfolderBase]: For 53/53 co-relation queries the response was YES. [2024-06-27 16:41:59,959 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1206 conditions, 565 events. 386/565 cut-off events. For 53/53 co-relation queries the response was YES. Maximal size of possible extension queue 33. Compared 1784 event pairs, 124 based on Foata normal form. 1/416 useless extension candidates. Maximal degree in co-relation 1030. Up to 349 conditions per place. [2024-06-27 16:41:59,963 INFO L140 encePairwiseOnDemand]: 20/25 looper letters, 32 selfloop transitions, 4 changer transitions 1/38 dead transitions. [2024-06-27 16:41:59,964 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 30 places, 38 transitions, 183 flow [2024-06-27 16:41:59,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-27 16:41:59,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-27 16:41:59,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 50 transitions. [2024-06-27 16:41:59,973 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6666666666666666 [2024-06-27 16:41:59,975 INFO L175 Difference]: Start difference. First operand has 28 places, 21 transitions, 60 flow. Second operand 3 states and 50 transitions. [2024-06-27 16:41:59,975 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 30 places, 38 transitions, 183 flow [2024-06-27 16:41:59,980 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 24 places, 38 transitions, 161 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-06-27 16:41:59,982 INFO L231 Difference]: Finished difference. Result has 25 places, 24 transitions, 74 flow [2024-06-27 16:41:59,984 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=25, PETRI_DIFFERENCE_MINUEND_FLOW=48, 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=17, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=74, PETRI_PLACES=25, PETRI_TRANSITIONS=24} [2024-06-27 16:41:59,987 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, -3 predicate places. [2024-06-27 16:41:59,987 INFO L495 AbstractCegarLoop]: Abstraction has has 25 places, 24 transitions, 74 flow [2024-06-27 16:41:59,988 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 9.666666666666666) internal successors, (29), 3 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:41:59,988 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:41:59,988 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 16:41:59,988 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-27 16:41:59,989 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-27 16:41:59,990 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:41:59,990 INFO L85 PathProgramCache]: Analyzing trace with hash 1373076166, now seen corresponding path program 1 times [2024-06-27 16:41:59,990 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:41:59,990 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [445083969] [2024-06-27 16:41:59,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:41:59,991 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:42:00,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:42:00,244 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 16:42:00,244 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:42:00,244 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [445083969] [2024-06-27 16:42:00,245 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [445083969] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 16:42:00,245 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 16:42:00,245 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 16:42:00,245 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1868786410] [2024-06-27 16:42:00,245 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 16:42:00,246 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 16:42:00,247 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:42:00,247 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 16:42:00,249 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2024-06-27 16:42:00,249 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 25 [2024-06-27 16:42:00,249 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 25 places, 24 transitions, 74 flow. Second operand has 7 states, 7 states have (on average 6.571428571428571) internal successors, (46), 7 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:42:00,249 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:42:00,250 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 25 [2024-06-27 16:42:00,250 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:42:00,497 INFO L124 PetriNetUnfolderBase]: 544/771 cut-off events. [2024-06-27 16:42:00,498 INFO L125 PetriNetUnfolderBase]: For 147/147 co-relation queries the response was YES. [2024-06-27 16:42:00,500 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1913 conditions, 771 events. 544/771 cut-off events. For 147/147 co-relation queries the response was YES. Maximal size of possible extension queue 45. Compared 2516 event pairs, 203 based on Foata normal form. 2/773 useless extension candidates. Maximal degree in co-relation 545. Up to 554 conditions per place. [2024-06-27 16:42:00,508 INFO L140 encePairwiseOnDemand]: 16/25 looper letters, 47 selfloop transitions, 18 changer transitions 3/69 dead transitions. [2024-06-27 16:42:00,508 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 31 places, 69 transitions, 347 flow [2024-06-27 16:42:00,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 16:42:00,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 16:42:00,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 87 transitions. [2024-06-27 16:42:00,510 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49714285714285716 [2024-06-27 16:42:00,510 INFO L175 Difference]: Start difference. First operand has 25 places, 24 transitions, 74 flow. Second operand 7 states and 87 transitions. [2024-06-27 16:42:00,510 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 31 places, 69 transitions, 347 flow [2024-06-27 16:42:00,511 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 30 places, 69 transitions, 334 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-27 16:42:00,512 INFO L231 Difference]: Finished difference. Result has 34 places, 40 transitions, 198 flow [2024-06-27 16:42:00,512 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=25, PETRI_DIFFERENCE_MINUEND_FLOW=70, PETRI_DIFFERENCE_MINUEND_PLACES=24, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=24, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=14, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=198, PETRI_PLACES=34, PETRI_TRANSITIONS=40} [2024-06-27 16:42:00,512 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 6 predicate places. [2024-06-27 16:42:00,513 INFO L495 AbstractCegarLoop]: Abstraction has has 34 places, 40 transitions, 198 flow [2024-06-27 16:42:00,513 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 6.571428571428571) internal successors, (46), 7 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:42:00,513 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:42:00,513 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 16:42:00,513 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-27 16:42:00,513 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-27 16:42:00,513 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:42:00,514 INFO L85 PathProgramCache]: Analyzing trace with hash -1366783543, now seen corresponding path program 1 times [2024-06-27 16:42:00,514 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:42:00,514 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1453372323] [2024-06-27 16:42:00,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:42:00,514 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:42:00,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:42:00,672 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 16:42:00,672 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:42:00,672 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1453372323] [2024-06-27 16:42:00,673 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1453372323] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 16:42:00,673 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [517189536] [2024-06-27 16:42:00,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:42:00,673 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:42:00,673 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 16:42:00,674 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-27 16:42:00,709 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-06-27 16:42:00,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:42:00,744 INFO L262 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 14 conjunts are in the unsatisfiable core [2024-06-27 16:42:00,748 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 16:42:00,852 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 16:42:00,852 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 16:42:01,357 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 16:42:01,358 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [517189536] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 16:42:01,358 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 16:42:01,358 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 8] total 15 [2024-06-27 16:42:01,359 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1431920497] [2024-06-27 16:42:01,359 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 16:42:01,360 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-06-27 16:42:01,361 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:42:01,362 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-06-27 16:42:01,363 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=153, Unknown=0, NotChecked=0, Total=210 [2024-06-27 16:42:01,363 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 25 [2024-06-27 16:42:01,364 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 34 places, 40 transitions, 198 flow. Second operand has 15 states, 15 states have (on average 6.2) internal successors, (93), 15 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:42:01,364 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:42:01,364 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 25 [2024-06-27 16:42:01,364 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:42:02,275 INFO L124 PetriNetUnfolderBase]: 1135/1672 cut-off events. [2024-06-27 16:42:02,275 INFO L125 PetriNetUnfolderBase]: For 1348/1348 co-relation queries the response was YES. [2024-06-27 16:42:02,278 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5285 conditions, 1672 events. 1135/1672 cut-off events. For 1348/1348 co-relation queries the response was YES. Maximal size of possible extension queue 98. Compared 7015 event pairs, 142 based on Foata normal form. 24/1696 useless extension candidates. Maximal degree in co-relation 3157. Up to 542 conditions per place. [2024-06-27 16:42:02,283 INFO L140 encePairwiseOnDemand]: 16/25 looper letters, 170 selfloop transitions, 60 changer transitions 0/231 dead transitions. [2024-06-27 16:42:02,284 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 231 transitions, 1367 flow [2024-06-27 16:42:02,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2024-06-27 16:42:02,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2024-06-27 16:42:02,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 300 transitions. [2024-06-27 16:42:02,289 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5454545454545454 [2024-06-27 16:42:02,289 INFO L175 Difference]: Start difference. First operand has 34 places, 40 transitions, 198 flow. Second operand 22 states and 300 transitions. [2024-06-27 16:42:02,289 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 231 transitions, 1367 flow [2024-06-27 16:42:02,297 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 231 transitions, 1345 flow, removed 11 selfloop flow, removed 0 redundant places. [2024-06-27 16:42:02,299 INFO L231 Difference]: Finished difference. Result has 71 places, 94 transitions, 718 flow [2024-06-27 16:42:02,300 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=25, PETRI_DIFFERENCE_MINUEND_FLOW=178, PETRI_DIFFERENCE_MINUEND_PLACES=33, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=18, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=718, PETRI_PLACES=71, PETRI_TRANSITIONS=94} [2024-06-27 16:42:02,300 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 43 predicate places. [2024-06-27 16:42:02,300 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 94 transitions, 718 flow [2024-06-27 16:42:02,301 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 6.2) internal successors, (93), 15 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:42:02,301 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:42:02,301 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 16:42:02,315 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-06-27 16:42:02,512 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:42:02,513 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-27 16:42:02,514 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:42:02,514 INFO L85 PathProgramCache]: Analyzing trace with hash 1901869040, now seen corresponding path program 2 times [2024-06-27 16:42:02,514 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:42:02,514 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1178337613] [2024-06-27 16:42:02,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:42:02,514 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:42:02,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:42:02,640 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 16:42:02,641 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:42:02,641 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1178337613] [2024-06-27 16:42:02,641 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1178337613] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 16:42:02,641 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 16:42:02,641 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 16:42:02,642 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2137819985] [2024-06-27 16:42:02,642 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 16:42:02,642 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 16:42:02,642 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:42:02,643 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 16:42:02,643 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-27 16:42:02,643 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 25 [2024-06-27 16:42:02,643 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 94 transitions, 718 flow. Second operand has 7 states, 7 states have (on average 6.571428571428571) internal successors, (46), 7 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:42:02,644 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:42:02,644 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 25 [2024-06-27 16:42:02,644 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:42:02,987 INFO L124 PetriNetUnfolderBase]: 1536/2293 cut-off events. [2024-06-27 16:42:02,988 INFO L125 PetriNetUnfolderBase]: For 21136/21136 co-relation queries the response was YES. [2024-06-27 16:42:02,993 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12756 conditions, 2293 events. 1536/2293 cut-off events. For 21136/21136 co-relation queries the response was YES. Maximal size of possible extension queue 129. Compared 10310 event pairs, 475 based on Foata normal form. 8/2301 useless extension candidates. Maximal degree in co-relation 9708. Up to 1296 conditions per place. [2024-06-27 16:42:03,003 INFO L140 encePairwiseOnDemand]: 16/25 looper letters, 150 selfloop transitions, 30 changer transitions 4/185 dead transitions. [2024-06-27 16:42:03,004 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 185 transitions, 1736 flow [2024-06-27 16:42:03,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 16:42:03,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 16:42:03,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 92 transitions. [2024-06-27 16:42:03,005 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5257142857142857 [2024-06-27 16:42:03,005 INFO L175 Difference]: Start difference. First operand has 71 places, 94 transitions, 718 flow. Second operand 7 states and 92 transitions. [2024-06-27 16:42:03,005 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 185 transitions, 1736 flow [2024-06-27 16:42:03,053 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 185 transitions, 1600 flow, removed 68 selfloop flow, removed 0 redundant places. [2024-06-27 16:42:03,055 INFO L231 Difference]: Finished difference. Result has 82 places, 104 transitions, 861 flow [2024-06-27 16:42:03,055 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=25, PETRI_DIFFERENCE_MINUEND_FLOW=614, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=94, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=861, PETRI_PLACES=82, PETRI_TRANSITIONS=104} [2024-06-27 16:42:03,056 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 54 predicate places. [2024-06-27 16:42:03,056 INFO L495 AbstractCegarLoop]: Abstraction has has 82 places, 104 transitions, 861 flow [2024-06-27 16:42:03,056 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 6.571428571428571) internal successors, (46), 7 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:42:03,056 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:42:03,057 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 16:42:03,057 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-27 16:42:03,057 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-27 16:42:03,057 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:42:03,057 INFO L85 PathProgramCache]: Analyzing trace with hash 1898738297, now seen corresponding path program 2 times [2024-06-27 16:42:03,057 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:42:03,058 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [684470630] [2024-06-27 16:42:03,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:42:03,058 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:42:03,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:42:03,155 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 16:42:03,155 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:42:03,155 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [684470630] [2024-06-27 16:42:03,155 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [684470630] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 16:42:03,155 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [165320624] [2024-06-27 16:42:03,156 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-06-27 16:42:03,156 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:42:03,156 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 16:42:03,157 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-27 16:42:03,193 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-06-27 16:42:03,243 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-06-27 16:42:03,244 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 16:42:03,245 INFO L262 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 12 conjunts are in the unsatisfiable core [2024-06-27 16:42:03,246 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 16:42:03,310 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 16:42:03,310 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 16:42:03,561 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 16:42:03,561 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [165320624] provided 1 perfect and 1 imperfect interpolant sequences [2024-06-27 16:42:03,561 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-06-27 16:42:03,561 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [7, 7] total 11 [2024-06-27 16:42:03,562 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [673723139] [2024-06-27 16:42:03,562 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 16:42:03,562 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 16:42:03,562 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:42:03,563 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 16:42:03,563 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2024-06-27 16:42:03,563 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 25 [2024-06-27 16:42:03,563 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 104 transitions, 861 flow. Second operand has 6 states, 6 states have (on average 7.0) internal successors, (42), 6 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) [2024-06-27 16:42:03,563 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:42:03,563 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 25 [2024-06-27 16:42:03,564 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:42:03,944 INFO L124 PetriNetUnfolderBase]: 1750/2634 cut-off events. [2024-06-27 16:42:03,945 INFO L125 PetriNetUnfolderBase]: For 28640/28640 co-relation queries the response was YES. [2024-06-27 16:42:03,953 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15869 conditions, 2634 events. 1750/2634 cut-off events. For 28640/28640 co-relation queries the response was YES. Maximal size of possible extension queue 149. Compared 12058 event pairs, 390 based on Foata normal form. 14/2648 useless extension candidates. Maximal degree in co-relation 12512. Up to 810 conditions per place. [2024-06-27 16:42:03,967 INFO L140 encePairwiseOnDemand]: 18/25 looper letters, 141 selfloop transitions, 51 changer transitions 0/193 dead transitions. [2024-06-27 16:42:03,967 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 193 transitions, 1992 flow [2024-06-27 16:42:03,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 16:42:03,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 16:42:03,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 119 transitions. [2024-06-27 16:42:03,968 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.595 [2024-06-27 16:42:03,968 INFO L175 Difference]: Start difference. First operand has 82 places, 104 transitions, 861 flow. Second operand 8 states and 119 transitions. [2024-06-27 16:42:03,968 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 193 transitions, 1992 flow [2024-06-27 16:42:04,019 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 193 transitions, 1848 flow, removed 63 selfloop flow, removed 2 redundant places. [2024-06-27 16:42:04,022 INFO L231 Difference]: Finished difference. Result has 91 places, 125 transitions, 1154 flow [2024-06-27 16:42:04,022 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=25, PETRI_DIFFERENCE_MINUEND_FLOW=792, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=104, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1154, PETRI_PLACES=91, PETRI_TRANSITIONS=125} [2024-06-27 16:42:04,023 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 63 predicate places. [2024-06-27 16:42:04,023 INFO L495 AbstractCegarLoop]: Abstraction has has 91 places, 125 transitions, 1154 flow [2024-06-27 16:42:04,023 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 7.0) internal successors, (42), 6 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) [2024-06-27 16:42:04,023 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:42:04,023 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 16:42:04,036 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-06-27 16:42:04,234 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 [2024-06-27 16:42:04,235 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-27 16:42:04,236 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:42:04,236 INFO L85 PathProgramCache]: Analyzing trace with hash 864832696, now seen corresponding path program 1 times [2024-06-27 16:42:04,236 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:42:04,236 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [416935032] [2024-06-27 16:42:04,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:42:04,236 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:42:04,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:42:04,359 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 16:42:04,359 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:42:04,359 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [416935032] [2024-06-27 16:42:04,362 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [416935032] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 16:42:04,363 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 16:42:04,363 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 16:42:04,363 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [488794386] [2024-06-27 16:42:04,363 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 16:42:04,363 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 16:42:04,364 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:42:04,364 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 16:42:04,364 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-27 16:42:04,365 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 25 [2024-06-27 16:42:04,365 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 91 places, 125 transitions, 1154 flow. Second operand has 7 states, 7 states have (on average 6.571428571428571) internal successors, (46), 7 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:42:04,365 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:42:04,365 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 25 [2024-06-27 16:42:04,365 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:42:04,741 INFO L124 PetriNetUnfolderBase]: 1808/2716 cut-off events. [2024-06-27 16:42:04,741 INFO L125 PetriNetUnfolderBase]: For 27896/27896 co-relation queries the response was YES. [2024-06-27 16:42:04,751 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15936 conditions, 2716 events. 1808/2716 cut-off events. For 27896/27896 co-relation queries the response was YES. Maximal size of possible extension queue 157. Compared 12618 event pairs, 771 based on Foata normal form. 4/2720 useless extension candidates. Maximal degree in co-relation 15352. Up to 2231 conditions per place. [2024-06-27 16:42:04,773 INFO L140 encePairwiseOnDemand]: 16/25 looper letters, 142 selfloop transitions, 37 changer transitions 5/185 dead transitions. [2024-06-27 16:42:04,774 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 97 places, 185 transitions, 2093 flow [2024-06-27 16:42:04,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 16:42:04,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 16:42:04,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 90 transitions. [2024-06-27 16:42:04,775 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5142857142857142 [2024-06-27 16:42:04,775 INFO L175 Difference]: Start difference. First operand has 91 places, 125 transitions, 1154 flow. Second operand 7 states and 90 transitions. [2024-06-27 16:42:04,775 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 97 places, 185 transitions, 2093 flow [2024-06-27 16:42:04,830 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 97 places, 185 transitions, 2087 flow, removed 3 selfloop flow, removed 0 redundant places. [2024-06-27 16:42:04,833 INFO L231 Difference]: Finished difference. Result has 102 places, 141 transitions, 1515 flow [2024-06-27 16:42:04,834 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=25, PETRI_DIFFERENCE_MINUEND_FLOW=1148, PETRI_DIFFERENCE_MINUEND_PLACES=91, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=125, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=95, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1515, PETRI_PLACES=102, PETRI_TRANSITIONS=141} [2024-06-27 16:42:04,836 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 74 predicate places. [2024-06-27 16:42:04,836 INFO L495 AbstractCegarLoop]: Abstraction has has 102 places, 141 transitions, 1515 flow [2024-06-27 16:42:04,836 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 6.571428571428571) internal successors, (46), 7 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:42:04,836 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:42:04,836 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 16:42:04,836 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-27 16:42:04,837 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-27 16:42:04,837 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:42:04,837 INFO L85 PathProgramCache]: Analyzing trace with hash 2041957270, now seen corresponding path program 2 times [2024-06-27 16:42:04,837 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:42:04,837 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1258201560] [2024-06-27 16:42:04,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:42:04,838 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:42:04,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:42:04,963 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 16:42:04,963 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:42:04,963 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1258201560] [2024-06-27 16:42:04,963 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1258201560] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 16:42:04,963 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 16:42:04,964 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 16:42:04,964 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [946781810] [2024-06-27 16:42:04,964 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 16:42:04,964 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 16:42:04,964 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:42:04,965 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 16:42:04,965 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2024-06-27 16:42:04,965 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 25 [2024-06-27 16:42:04,965 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 102 places, 141 transitions, 1515 flow. Second operand has 7 states, 7 states have (on average 6.571428571428571) internal successors, (46), 7 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:42:04,965 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:42:04,965 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 25 [2024-06-27 16:42:04,965 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:42:05,346 INFO L124 PetriNetUnfolderBase]: 2003/2970 cut-off events. [2024-06-27 16:42:05,347 INFO L125 PetriNetUnfolderBase]: For 42009/42009 co-relation queries the response was YES. [2024-06-27 16:42:05,357 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19496 conditions, 2970 events. 2003/2970 cut-off events. For 42009/42009 co-relation queries the response was YES. Maximal size of possible extension queue 167. Compared 13732 event pairs, 686 based on Foata normal form. 4/2974 useless extension candidates. Maximal degree in co-relation 18635. Up to 2266 conditions per place. [2024-06-27 16:42:05,371 INFO L140 encePairwiseOnDemand]: 16/25 looper letters, 158 selfloop transitions, 87 changer transitions 5/251 dead transitions. [2024-06-27 16:42:05,371 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 107 places, 251 transitions, 3314 flow [2024-06-27 16:42:05,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 16:42:05,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 16:42:05,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 86 transitions. [2024-06-27 16:42:05,372 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49142857142857144 [2024-06-27 16:42:05,372 INFO L175 Difference]: Start difference. First operand has 102 places, 141 transitions, 1515 flow. Second operand 7 states and 86 transitions. [2024-06-27 16:42:05,372 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 107 places, 251 transitions, 3314 flow [2024-06-27 16:42:05,450 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 104 places, 251 transitions, 3018 flow, removed 88 selfloop flow, removed 3 redundant places. [2024-06-27 16:42:05,453 INFO L231 Difference]: Finished difference. Result has 108 places, 181 transitions, 2199 flow [2024-06-27 16:42:05,453 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=25, PETRI_DIFFERENCE_MINUEND_FLOW=1365, PETRI_DIFFERENCE_MINUEND_PLACES=98, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=141, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2199, PETRI_PLACES=108, PETRI_TRANSITIONS=181} [2024-06-27 16:42:05,454 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 80 predicate places. [2024-06-27 16:42:05,454 INFO L495 AbstractCegarLoop]: Abstraction has has 108 places, 181 transitions, 2199 flow [2024-06-27 16:42:05,454 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 6.571428571428571) internal successors, (46), 7 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:42:05,454 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:42:05,454 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 16:42:05,455 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-27 16:42:05,455 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-27 16:42:05,455 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:42:05,455 INFO L85 PathProgramCache]: Analyzing trace with hash 1873234894, now seen corresponding path program 3 times [2024-06-27 16:42:05,455 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:42:05,455 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [998416667] [2024-06-27 16:42:05,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:42:05,456 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:42:05,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:42:05,557 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 16:42:05,557 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:42:05,557 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [998416667] [2024-06-27 16:42:05,558 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [998416667] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 16:42:05,558 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [448832904] [2024-06-27 16:42:05,559 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-06-27 16:42:05,559 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:42:05,559 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 16:42:05,560 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-27 16:42:05,606 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-06-27 16:42:05,639 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-06-27 16:42:05,639 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 16:42:05,640 INFO L262 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 14 conjunts are in the unsatisfiable core [2024-06-27 16:42:05,641 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 16:42:05,727 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 16:42:05,727 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 16:42:05,841 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 16:42:05,841 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [448832904] provided 1 perfect and 1 imperfect interpolant sequences [2024-06-27 16:42:05,841 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-06-27 16:42:05,842 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7, 8] total 16 [2024-06-27 16:42:05,842 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [769691454] [2024-06-27 16:42:05,842 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 16:42:05,842 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 16:42:05,842 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:42:05,843 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 16:42:05,843 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=177, Unknown=0, NotChecked=0, Total=240 [2024-06-27 16:42:05,843 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 25 [2024-06-27 16:42:05,843 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 108 places, 181 transitions, 2199 flow. Second operand has 7 states, 7 states have (on average 6.571428571428571) internal successors, (46), 7 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:42:05,843 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:42:05,843 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 25 [2024-06-27 16:42:05,844 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:42:06,280 INFO L124 PetriNetUnfolderBase]: 2252/3296 cut-off events. [2024-06-27 16:42:06,281 INFO L125 PetriNetUnfolderBase]: For 50984/50984 co-relation queries the response was YES. [2024-06-27 16:42:06,291 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23082 conditions, 3296 events. 2252/3296 cut-off events. For 50984/50984 co-relation queries the response was YES. Maximal size of possible extension queue 186. Compared 15201 event pairs, 615 based on Foata normal form. 13/3309 useless extension candidates. Maximal degree in co-relation 22489. Up to 1518 conditions per place. [2024-06-27 16:42:06,305 INFO L140 encePairwiseOnDemand]: 18/25 looper letters, 209 selfloop transitions, 41 changer transitions 1/252 dead transitions. [2024-06-27 16:42:06,306 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 112 places, 252 transitions, 3554 flow [2024-06-27 16:42:06,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 16:42:06,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 16:42:06,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 86 transitions. [2024-06-27 16:42:06,307 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5733333333333334 [2024-06-27 16:42:06,307 INFO L175 Difference]: Start difference. First operand has 108 places, 181 transitions, 2199 flow. Second operand 6 states and 86 transitions. [2024-06-27 16:42:06,307 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 112 places, 252 transitions, 3554 flow [2024-06-27 16:42:06,447 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 112 places, 252 transitions, 3230 flow, removed 162 selfloop flow, removed 0 redundant places. [2024-06-27 16:42:06,451 INFO L231 Difference]: Finished difference. Result has 116 places, 199 transitions, 2495 flow [2024-06-27 16:42:06,451 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=25, PETRI_DIFFERENCE_MINUEND_FLOW=1991, PETRI_DIFFERENCE_MINUEND_PLACES=107, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=181, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=146, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2495, PETRI_PLACES=116, PETRI_TRANSITIONS=199} [2024-06-27 16:42:06,451 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 88 predicate places. [2024-06-27 16:42:06,451 INFO L495 AbstractCegarLoop]: Abstraction has has 116 places, 199 transitions, 2495 flow [2024-06-27 16:42:06,452 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 6.571428571428571) internal successors, (46), 7 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:42:06,452 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:42:06,452 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 16:42:06,476 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-06-27 16:42:06,663 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:42:06,663 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-27 16:42:06,663 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:42:06,664 INFO L85 PathProgramCache]: Analyzing trace with hash -341399118, now seen corresponding path program 4 times [2024-06-27 16:42:06,664 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:42:06,664 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [285393872] [2024-06-27 16:42:06,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:42:06,664 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:42:06,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:42:06,789 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 16:42:06,790 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:42:06,790 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [285393872] [2024-06-27 16:42:06,790 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [285393872] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 16:42:06,790 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 16:42:06,790 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 16:42:06,791 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1398718055] [2024-06-27 16:42:06,792 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 16:42:06,792 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 16:42:06,792 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:42:06,793 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 16:42:06,793 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-27 16:42:06,794 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 25 [2024-06-27 16:42:06,794 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 116 places, 199 transitions, 2495 flow. Second operand has 7 states, 7 states have (on average 6.571428571428571) internal successors, (46), 7 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:42:06,794 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:42:06,794 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 25 [2024-06-27 16:42:06,794 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:42:07,234 INFO L124 PetriNetUnfolderBase]: 2260/3308 cut-off events. [2024-06-27 16:42:07,234 INFO L125 PetriNetUnfolderBase]: For 51127/51127 co-relation queries the response was YES. [2024-06-27 16:42:07,248 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22751 conditions, 3308 events. 2260/3308 cut-off events. For 51127/51127 co-relation queries the response was YES. Maximal size of possible extension queue 189. Compared 15253 event pairs, 696 based on Foata normal form. 2/3310 useless extension candidates. Maximal degree in co-relation 22157. Up to 2474 conditions per place. [2024-06-27 16:42:07,265 INFO L140 encePairwiseOnDemand]: 16/25 looper letters, 168 selfloop transitions, 100 changer transitions 3/272 dead transitions. [2024-06-27 16:42:07,265 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 122 places, 272 transitions, 3855 flow [2024-06-27 16:42:07,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 16:42:07,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 16:42:07,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 85 transitions. [2024-06-27 16:42:07,267 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4857142857142857 [2024-06-27 16:42:07,267 INFO L175 Difference]: Start difference. First operand has 116 places, 199 transitions, 2495 flow. Second operand 7 states and 85 transitions. [2024-06-27 16:42:07,267 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 122 places, 272 transitions, 3855 flow [2024-06-27 16:42:07,440 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 121 places, 272 transitions, 3719 flow, removed 59 selfloop flow, removed 1 redundant places. [2024-06-27 16:42:07,444 INFO L231 Difference]: Finished difference. Result has 125 places, 230 transitions, 3169 flow [2024-06-27 16:42:07,444 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=25, PETRI_DIFFERENCE_MINUEND_FLOW=2364, PETRI_DIFFERENCE_MINUEND_PLACES=115, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=199, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=76, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=119, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3169, PETRI_PLACES=125, PETRI_TRANSITIONS=230} [2024-06-27 16:42:07,445 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 97 predicate places. [2024-06-27 16:42:07,445 INFO L495 AbstractCegarLoop]: Abstraction has has 125 places, 230 transitions, 3169 flow [2024-06-27 16:42:07,445 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 6.571428571428571) internal successors, (46), 7 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:42:07,445 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:42:07,445 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 16:42:07,445 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-27 16:42:07,446 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-27 16:42:07,446 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:42:07,446 INFO L85 PathProgramCache]: Analyzing trace with hash -1569627070, now seen corresponding path program 5 times [2024-06-27 16:42:07,446 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:42:07,446 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [966837672] [2024-06-27 16:42:07,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:42:07,447 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:42:07,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:42:07,544 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 16:42:07,544 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:42:07,544 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [966837672] [2024-06-27 16:42:07,544 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [966837672] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 16:42:07,545 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 16:42:07,545 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 16:42:07,545 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [578664096] [2024-06-27 16:42:07,545 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 16:42:07,545 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 16:42:07,545 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:42:07,546 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 16:42:07,546 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2024-06-27 16:42:07,546 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 25 [2024-06-27 16:42:07,546 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 125 places, 230 transitions, 3169 flow. Second operand has 7 states, 7 states have (on average 6.571428571428571) internal successors, (46), 7 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:42:07,546 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:42:07,546 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 25 [2024-06-27 16:42:07,547 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:42:08,108 INFO L124 PetriNetUnfolderBase]: 2351/3476 cut-off events. [2024-06-27 16:42:08,109 INFO L125 PetriNetUnfolderBase]: For 55075/55075 co-relation queries the response was YES. [2024-06-27 16:42:08,125 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24881 conditions, 3476 events. 2351/3476 cut-off events. For 55075/55075 co-relation queries the response was YES. Maximal size of possible extension queue 205. Compared 16572 event pairs, 476 based on Foata normal form. 10/3486 useless extension candidates. Maximal degree in co-relation 24283. Up to 1870 conditions per place. [2024-06-27 16:42:08,141 INFO L140 encePairwiseOnDemand]: 16/25 looper letters, 230 selfloop transitions, 105 changer transitions 12/348 dead transitions. [2024-06-27 16:42:08,142 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 130 places, 348 transitions, 5331 flow [2024-06-27 16:42:08,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 16:42:08,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 16:42:08,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 88 transitions. [2024-06-27 16:42:08,143 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5028571428571429 [2024-06-27 16:42:08,143 INFO L175 Difference]: Start difference. First operand has 125 places, 230 transitions, 3169 flow. Second operand 7 states and 88 transitions. [2024-06-27 16:42:08,143 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 130 places, 348 transitions, 5331 flow [2024-06-27 16:42:08,344 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 129 places, 348 transitions, 5119 flow, removed 106 selfloop flow, removed 1 redundant places. [2024-06-27 16:42:08,349 INFO L231 Difference]: Finished difference. Result has 133 places, 247 transitions, 3625 flow [2024-06-27 16:42:08,349 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=25, PETRI_DIFFERENCE_MINUEND_FLOW=2985, PETRI_DIFFERENCE_MINUEND_PLACES=123, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=230, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=88, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=125, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3625, PETRI_PLACES=133, PETRI_TRANSITIONS=247} [2024-06-27 16:42:08,349 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 105 predicate places. [2024-06-27 16:42:08,350 INFO L495 AbstractCegarLoop]: Abstraction has has 133 places, 247 transitions, 3625 flow [2024-06-27 16:42:08,350 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 6.571428571428571) internal successors, (46), 7 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:42:08,350 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:42:08,350 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 16:42:08,350 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-27 16:42:08,350 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-27 16:42:08,351 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:42:08,351 INFO L85 PathProgramCache]: Analyzing trace with hash -2054293548, now seen corresponding path program 6 times [2024-06-27 16:42:08,351 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:42:08,351 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [263783301] [2024-06-27 16:42:08,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:42:08,351 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:42:08,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:42:08,438 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 16:42:08,438 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:42:08,438 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [263783301] [2024-06-27 16:42:08,438 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [263783301] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 16:42:08,438 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1611934972] [2024-06-27 16:42:08,438 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-06-27 16:42:08,439 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:42:08,439 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 16:42:08,440 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-27 16:42:08,488 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-06-27 16:42:08,516 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2024-06-27 16:42:08,516 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 16:42:08,518 INFO L262 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 14 conjunts are in the unsatisfiable core [2024-06-27 16:42:08,519 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 16:42:08,598 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 16:42:08,598 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 16:42:08,950 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 16:42:08,951 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1611934972] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 16:42:08,951 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 16:42:08,951 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 8] total 15 [2024-06-27 16:42:08,951 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2080631943] [2024-06-27 16:42:08,951 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 16:42:08,952 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-06-27 16:42:08,952 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:42:08,953 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-06-27 16:42:08,953 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=153, Unknown=0, NotChecked=0, Total=210 [2024-06-27 16:42:08,953 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 25 [2024-06-27 16:42:08,954 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 133 places, 247 transitions, 3625 flow. Second operand has 15 states, 15 states have (on average 6.2) internal successors, (93), 15 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:42:08,954 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:42:08,954 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 25 [2024-06-27 16:42:08,954 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:42:10,320 INFO L124 PetriNetUnfolderBase]: 3289/4959 cut-off events. [2024-06-27 16:42:10,320 INFO L125 PetriNetUnfolderBase]: For 73857/73857 co-relation queries the response was YES. [2024-06-27 16:42:10,342 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34340 conditions, 4959 events. 3289/4959 cut-off events. For 73857/73857 co-relation queries the response was YES. Maximal size of possible extension queue 289. Compared 26019 event pairs, 424 based on Foata normal form. 26/4985 useless extension candidates. Maximal degree in co-relation 33176. Up to 1673 conditions per place. [2024-06-27 16:42:10,361 INFO L140 encePairwiseOnDemand]: 16/25 looper letters, 286 selfloop transitions, 238 changer transitions 1/526 dead transitions. [2024-06-27 16:42:10,361 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 153 places, 526 transitions, 7438 flow [2024-06-27 16:42:10,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2024-06-27 16:42:10,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2024-06-27 16:42:10,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 289 transitions. [2024-06-27 16:42:10,362 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5254545454545455 [2024-06-27 16:42:10,363 INFO L175 Difference]: Start difference. First operand has 133 places, 247 transitions, 3625 flow. Second operand 22 states and 289 transitions. [2024-06-27 16:42:10,363 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 153 places, 526 transitions, 7438 flow [2024-06-27 16:42:10,657 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 150 places, 526 transitions, 7030 flow, removed 55 selfloop flow, removed 3 redundant places. [2024-06-27 16:42:10,663 INFO L231 Difference]: Finished difference. Result has 166 places, 330 transitions, 5339 flow [2024-06-27 16:42:10,663 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=25, PETRI_DIFFERENCE_MINUEND_FLOW=3384, PETRI_DIFFERENCE_MINUEND_PLACES=129, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=247, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=164, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=5339, PETRI_PLACES=166, PETRI_TRANSITIONS=330} [2024-06-27 16:42:10,664 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 138 predicate places. [2024-06-27 16:42:10,664 INFO L495 AbstractCegarLoop]: Abstraction has has 166 places, 330 transitions, 5339 flow [2024-06-27 16:42:10,664 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 6.2) internal successors, (93), 15 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:42:10,664 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:42:10,664 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 16:42:10,678 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2024-06-27 16:42:10,875 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:42:10,876 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-27 16:42:10,876 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:42:10,876 INFO L85 PathProgramCache]: Analyzing trace with hash 1556488846, now seen corresponding path program 7 times [2024-06-27 16:42:10,877 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:42:10,877 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [744660868] [2024-06-27 16:42:10,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:42:10,877 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:42:10,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:42:10,994 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 16:42:10,994 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:42:10,994 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [744660868] [2024-06-27 16:42:10,995 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [744660868] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 16:42:10,995 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1004360096] [2024-06-27 16:42:10,995 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-06-27 16:42:10,996 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:42:10,996 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 16:42:10,998 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-27 16:42:11,029 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-06-27 16:42:11,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:42:11,079 INFO L262 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 11 conjunts are in the unsatisfiable core [2024-06-27 16:42:11,080 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 16:42:11,158 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 16:42:11,159 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 16:42:11,225 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 16:42:11,226 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1004360096] provided 1 perfect and 1 imperfect interpolant sequences [2024-06-27 16:42:11,226 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-06-27 16:42:11,226 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [7, 7] total 9 [2024-06-27 16:42:11,228 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [258648310] [2024-06-27 16:42:11,228 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 16:42:11,228 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 16:42:11,229 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:42:11,229 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 16:42:11,229 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-27 16:42:11,229 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 25 [2024-06-27 16:42:11,230 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 166 places, 330 transitions, 5339 flow. Second operand has 6 states, 6 states have (on average 7.0) internal successors, (42), 6 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) [2024-06-27 16:42:11,230 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:42:11,230 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 25 [2024-06-27 16:42:11,230 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:42:12,324 INFO L124 PetriNetUnfolderBase]: 3785/5669 cut-off events. [2024-06-27 16:42:12,324 INFO L125 PetriNetUnfolderBase]: For 102375/102375 co-relation queries the response was YES. [2024-06-27 16:42:12,357 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43496 conditions, 5669 events. 3785/5669 cut-off events. For 102375/102375 co-relation queries the response was YES. Maximal size of possible extension queue 337. Compared 30090 event pairs, 518 based on Foata normal form. 13/5682 useless extension candidates. Maximal degree in co-relation 43003. Up to 1939 conditions per place. [2024-06-27 16:42:12,385 INFO L140 encePairwiseOnDemand]: 18/25 looper letters, 350 selfloop transitions, 136 changer transitions 2/489 dead transitions. [2024-06-27 16:42:12,386 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 173 places, 489 transitions, 8536 flow [2024-06-27 16:42:12,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 16:42:12,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 16:42:12,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 124 transitions. [2024-06-27 16:42:12,387 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.62 [2024-06-27 16:42:12,387 INFO L175 Difference]: Start difference. First operand has 166 places, 330 transitions, 5339 flow. Second operand 8 states and 124 transitions. [2024-06-27 16:42:12,387 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 173 places, 489 transitions, 8536 flow [2024-06-27 16:42:12,915 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 172 places, 489 transitions, 8183 flow, removed 131 selfloop flow, removed 1 redundant places. [2024-06-27 16:42:12,921 INFO L231 Difference]: Finished difference. Result has 177 places, 385 transitions, 6604 flow [2024-06-27 16:42:12,922 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=25, PETRI_DIFFERENCE_MINUEND_FLOW=5094, PETRI_DIFFERENCE_MINUEND_PLACES=165, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=330, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=81, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=203, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6604, PETRI_PLACES=177, PETRI_TRANSITIONS=385} [2024-06-27 16:42:12,922 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 149 predicate places. [2024-06-27 16:42:12,922 INFO L495 AbstractCegarLoop]: Abstraction has has 177 places, 385 transitions, 6604 flow [2024-06-27 16:42:12,923 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 7.0) internal successors, (42), 6 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) [2024-06-27 16:42:12,923 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:42:12,923 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 16:42:12,934 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2024-06-27 16:42:13,128 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2024-06-27 16:42:13,129 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-27 16:42:13,129 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:42:13,129 INFO L85 PathProgramCache]: Analyzing trace with hash 330952359, now seen corresponding path program 3 times [2024-06-27 16:42:13,129 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:42:13,129 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1377693872] [2024-06-27 16:42:13,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:42:13,129 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:42:13,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:42:13,293 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 16:42:13,293 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:42:13,293 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1377693872] [2024-06-27 16:42:13,293 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1377693872] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 16:42:13,294 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 16:42:13,294 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 16:42:13,294 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [834697188] [2024-06-27 16:42:13,294 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 16:42:13,294 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 16:42:13,294 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:42:13,295 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 16:42:13,295 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-27 16:42:13,295 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 25 [2024-06-27 16:42:13,295 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 177 places, 385 transitions, 6604 flow. Second operand has 7 states, 7 states have (on average 6.571428571428571) internal successors, (46), 7 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:42:13,295 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:42:13,295 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 25 [2024-06-27 16:42:13,295 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:42:14,322 INFO L124 PetriNetUnfolderBase]: 3787/5674 cut-off events. [2024-06-27 16:42:14,323 INFO L125 PetriNetUnfolderBase]: For 110005/110005 co-relation queries the response was YES. [2024-06-27 16:42:14,353 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43866 conditions, 5674 events. 3787/5674 cut-off events. For 110005/110005 co-relation queries the response was YES. Maximal size of possible extension queue 339. Compared 30249 event pairs, 1176 based on Foata normal form. 3/5677 useless extension candidates. Maximal degree in co-relation 43349. Up to 3754 conditions per place. [2024-06-27 16:42:14,380 INFO L140 encePairwiseOnDemand]: 16/25 looper letters, 379 selfloop transitions, 61 changer transitions 9/450 dead transitions. [2024-06-27 16:42:14,380 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 183 places, 450 transitions, 8267 flow [2024-06-27 16:42:14,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 16:42:14,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 16:42:14,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 95 transitions. [2024-06-27 16:42:14,381 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5428571428571428 [2024-06-27 16:42:14,381 INFO L175 Difference]: Start difference. First operand has 177 places, 385 transitions, 6604 flow. Second operand 7 states and 95 transitions. [2024-06-27 16:42:14,382 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 183 places, 450 transitions, 8267 flow [2024-06-27 16:42:14,993 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 183 places, 450 transitions, 8149 flow, removed 59 selfloop flow, removed 0 redundant places. [2024-06-27 16:42:15,000 INFO L231 Difference]: Finished difference. Result has 185 places, 386 transitions, 6668 flow [2024-06-27 16:42:15,001 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=25, PETRI_DIFFERENCE_MINUEND_FLOW=6506, PETRI_DIFFERENCE_MINUEND_PLACES=177, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=385, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=60, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=324, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6668, PETRI_PLACES=185, PETRI_TRANSITIONS=386} [2024-06-27 16:42:15,001 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 157 predicate places. [2024-06-27 16:42:15,001 INFO L495 AbstractCegarLoop]: Abstraction has has 185 places, 386 transitions, 6668 flow [2024-06-27 16:42:15,001 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 6.571428571428571) internal successors, (46), 7 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:42:15,001 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:42:15,002 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 16:42:15,002 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-27 16:42:15,002 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-27 16:42:15,002 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:42:15,002 INFO L85 PathProgramCache]: Analyzing trace with hash -1911593595, now seen corresponding path program 4 times [2024-06-27 16:42:15,002 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:42:15,003 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1271785087] [2024-06-27 16:42:15,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:42:15,003 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:42:15,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:42:15,086 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 16:42:15,086 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:42:15,086 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1271785087] [2024-06-27 16:42:15,087 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1271785087] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 16:42:15,087 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1917260242] [2024-06-27 16:42:15,087 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-06-27 16:42:15,087 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:42:15,087 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 16:42:15,104 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) [2024-06-27 16:42:15,114 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-06-27 16:42:15,164 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-06-27 16:42:15,164 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 16:42:15,165 INFO L262 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 12 conjunts are in the unsatisfiable core [2024-06-27 16:42:15,166 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 16:42:15,229 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 16:42:15,229 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 16:42:15,339 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 16:42:15,340 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1917260242] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 16:42:15,340 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 16:42:15,340 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 8] total 17 [2024-06-27 16:42:15,341 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1870532973] [2024-06-27 16:42:15,341 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 16:42:15,341 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-06-27 16:42:15,341 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:42:15,342 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-06-27 16:42:15,342 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=189, Unknown=0, NotChecked=0, Total=272 [2024-06-27 16:42:15,342 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 25 [2024-06-27 16:42:15,342 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 185 places, 386 transitions, 6668 flow. Second operand has 17 states, 17 states have (on average 5.764705882352941) internal successors, (98), 17 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:42:15,342 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:42:15,342 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 25 [2024-06-27 16:42:15,342 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:42:16,854 INFO L124 PetriNetUnfolderBase]: 4437/6501 cut-off events. [2024-06-27 16:42:16,854 INFO L125 PetriNetUnfolderBase]: For 122069/122069 co-relation queries the response was YES. [2024-06-27 16:42:16,886 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49883 conditions, 6501 events. 4437/6501 cut-off events. For 122069/122069 co-relation queries the response was YES. Maximal size of possible extension queue 389. Compared 34379 event pairs, 1063 based on Foata normal form. 22/6523 useless extension candidates. Maximal degree in co-relation 49411. Up to 4694 conditions per place. [2024-06-27 16:42:16,912 INFO L140 encePairwiseOnDemand]: 16/25 looper letters, 452 selfloop transitions, 201 changer transitions 1/655 dead transitions. [2024-06-27 16:42:16,913 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 204 places, 655 transitions, 12038 flow [2024-06-27 16:42:16,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2024-06-27 16:42:16,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2024-06-27 16:42:16,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 247 transitions. [2024-06-27 16:42:16,915 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4704761904761905 [2024-06-27 16:42:16,915 INFO L175 Difference]: Start difference. First operand has 185 places, 386 transitions, 6668 flow. Second operand 21 states and 247 transitions. [2024-06-27 16:42:16,915 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 204 places, 655 transitions, 12038 flow [2024-06-27 16:42:17,514 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 201 places, 655 transitions, 11828 flow, removed 30 selfloop flow, removed 3 redundant places. [2024-06-27 16:42:17,523 INFO L231 Difference]: Finished difference. Result has 215 places, 515 transitions, 9669 flow [2024-06-27 16:42:17,523 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=25, PETRI_DIFFERENCE_MINUEND_FLOW=6546, PETRI_DIFFERENCE_MINUEND_PLACES=181, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=386, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=81, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=258, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=9669, PETRI_PLACES=215, PETRI_TRANSITIONS=515} [2024-06-27 16:42:17,524 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 187 predicate places. [2024-06-27 16:42:17,524 INFO L495 AbstractCegarLoop]: Abstraction has has 215 places, 515 transitions, 9669 flow [2024-06-27 16:42:17,524 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 5.764705882352941) internal successors, (98), 17 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:42:17,524 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:42:17,524 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 16:42:17,537 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-06-27 16:42:17,728 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:42:17,729 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-27 16:42:17,729 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:42:17,730 INFO L85 PathProgramCache]: Analyzing trace with hash 338449826, now seen corresponding path program 8 times [2024-06-27 16:42:17,730 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:42:17,730 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1250289510] [2024-06-27 16:42:17,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:42:17,731 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:42:17,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:42:17,937 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 16:42:17,937 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:42:17,937 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1250289510] [2024-06-27 16:42:17,938 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1250289510] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 16:42:17,938 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 16:42:17,938 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 16:42:17,938 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [429420097] [2024-06-27 16:42:17,938 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 16:42:17,939 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 16:42:17,939 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:42:17,939 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 16:42:17,939 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-27 16:42:17,939 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 25 [2024-06-27 16:42:17,940 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 215 places, 515 transitions, 9669 flow. Second operand has 7 states, 7 states have (on average 6.571428571428571) internal successors, (46), 7 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:42:17,940 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:42:17,940 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 25 [2024-06-27 16:42:17,940 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:42:19,444 INFO L124 PetriNetUnfolderBase]: 4601/6827 cut-off events. [2024-06-27 16:42:19,445 INFO L125 PetriNetUnfolderBase]: For 150457/150457 co-relation queries the response was YES. [2024-06-27 16:42:19,489 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57160 conditions, 6827 events. 4601/6827 cut-off events. For 150457/150457 co-relation queries the response was YES. Maximal size of possible extension queue 416. Compared 37055 event pairs, 606 based on Foata normal form. 18/6845 useless extension candidates. Maximal degree in co-relation 56666. Up to 2466 conditions per place. [2024-06-27 16:42:19,526 INFO L140 encePairwiseOnDemand]: 16/25 looper letters, 345 selfloop transitions, 289 changer transitions 3/638 dead transitions. [2024-06-27 16:42:19,526 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 224 places, 638 transitions, 12470 flow [2024-06-27 16:42:19,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 16:42:19,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 16:42:19,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 148 transitions. [2024-06-27 16:42:19,528 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.592 [2024-06-27 16:42:19,528 INFO L175 Difference]: Start difference. First operand has 215 places, 515 transitions, 9669 flow. Second operand 10 states and 148 transitions. [2024-06-27 16:42:19,528 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 224 places, 638 transitions, 12470 flow [2024-06-27 16:42:20,458 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 222 places, 638 transitions, 11749 flow, removed 328 selfloop flow, removed 2 redundant places. [2024-06-27 16:42:20,467 INFO L231 Difference]: Finished difference. Result has 225 places, 536 transitions, 10206 flow [2024-06-27 16:42:20,467 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=25, PETRI_DIFFERENCE_MINUEND_FLOW=8972, PETRI_DIFFERENCE_MINUEND_PLACES=213, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=515, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=268, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=237, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=10206, PETRI_PLACES=225, PETRI_TRANSITIONS=536} [2024-06-27 16:42:20,468 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 197 predicate places. [2024-06-27 16:42:20,468 INFO L495 AbstractCegarLoop]: Abstraction has has 225 places, 536 transitions, 10206 flow [2024-06-27 16:42:20,468 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 6.571428571428571) internal successors, (46), 7 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:42:20,468 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:42:20,468 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 16:42:20,468 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-27 16:42:20,469 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-27 16:42:20,469 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:42:20,469 INFO L85 PathProgramCache]: Analyzing trace with hash -949778716, now seen corresponding path program 3 times [2024-06-27 16:42:20,469 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:42:20,469 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [760519690] [2024-06-27 16:42:20,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:42:20,470 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:42:20,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:42:20,557 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 16:42:20,557 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:42:20,557 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [760519690] [2024-06-27 16:42:20,557 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [760519690] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 16:42:20,558 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 16:42:20,558 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 16:42:20,558 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [488404162] [2024-06-27 16:42:20,558 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 16:42:20,558 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 16:42:20,558 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:42:20,559 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 16:42:20,559 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-27 16:42:20,559 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 25 [2024-06-27 16:42:20,559 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 225 places, 536 transitions, 10206 flow. Second operand has 7 states, 7 states have (on average 6.571428571428571) internal successors, (46), 7 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:42:20,559 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:42:20,559 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 25 [2024-06-27 16:42:20,559 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:42:21,951 INFO L124 PetriNetUnfolderBase]: 4611/6865 cut-off events. [2024-06-27 16:42:21,951 INFO L125 PetriNetUnfolderBase]: For 159090/159090 co-relation queries the response was YES. [2024-06-27 16:42:22,117 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57287 conditions, 6865 events. 4611/6865 cut-off events. For 159090/159090 co-relation queries the response was YES. Maximal size of possible extension queue 425. Compared 37667 event pairs, 1219 based on Foata normal form. 12/6877 useless extension candidates. Maximal degree in co-relation 56835. Up to 4676 conditions per place. [2024-06-27 16:42:22,150 INFO L140 encePairwiseOnDemand]: 16/25 looper letters, 505 selfloop transitions, 78 changer transitions 21/605 dead transitions. [2024-06-27 16:42:22,150 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 231 places, 605 transitions, 12236 flow [2024-06-27 16:42:22,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 16:42:22,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 16:42:22,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 99 transitions. [2024-06-27 16:42:22,151 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5657142857142857 [2024-06-27 16:42:22,151 INFO L175 Difference]: Start difference. First operand has 225 places, 536 transitions, 10206 flow. Second operand 7 states and 99 transitions. [2024-06-27 16:42:22,152 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 231 places, 605 transitions, 12236 flow [2024-06-27 16:42:23,124 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 229 places, 605 transitions, 12115 flow, removed 3 selfloop flow, removed 2 redundant places. [2024-06-27 16:42:23,133 INFO L231 Difference]: Finished difference. Result has 231 places, 533 transitions, 10186 flow [2024-06-27 16:42:23,134 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=25, PETRI_DIFFERENCE_MINUEND_FLOW=10085, PETRI_DIFFERENCE_MINUEND_PLACES=223, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=536, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=78, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=458, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=10186, PETRI_PLACES=231, PETRI_TRANSITIONS=533} [2024-06-27 16:42:23,134 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 203 predicate places. [2024-06-27 16:42:23,134 INFO L495 AbstractCegarLoop]: Abstraction has has 231 places, 533 transitions, 10186 flow [2024-06-27 16:42:23,134 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 6.571428571428571) internal successors, (46), 7 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:42:23,134 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:42:23,134 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 16:42:23,135 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-27 16:42:23,135 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-27 16:42:23,135 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:42:23,135 INFO L85 PathProgramCache]: Analyzing trace with hash 337231503, now seen corresponding path program 5 times [2024-06-27 16:42:23,135 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:42:23,135 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2047164908] [2024-06-27 16:42:23,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:42:23,136 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:42:23,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:42:23,216 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 16:42:23,217 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:42:23,217 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2047164908] [2024-06-27 16:42:23,217 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2047164908] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 16:42:23,217 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [41197610] [2024-06-27 16:42:23,217 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-06-27 16:42:23,217 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:42:23,218 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 16:42:23,233 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) [2024-06-27 16:42:23,278 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-06-27 16:42:23,327 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-06-27 16:42:23,327 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 16:42:23,328 INFO L262 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 14 conjunts are in the unsatisfiable core [2024-06-27 16:42:23,329 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 16:42:23,390 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 16:42:23,390 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 16:42:23,531 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 16:42:23,532 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [41197610] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 16:42:23,532 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 16:42:23,532 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 8] total 15 [2024-06-27 16:42:23,533 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [323621331] [2024-06-27 16:42:23,533 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 16:42:23,534 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-06-27 16:42:23,534 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:42:23,534 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-06-27 16:42:23,535 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=154, Unknown=0, NotChecked=0, Total=210 [2024-06-27 16:42:23,536 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 25 [2024-06-27 16:42:23,536 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 231 places, 533 transitions, 10186 flow. Second operand has 15 states, 15 states have (on average 6.0) internal successors, (90), 15 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) [2024-06-27 16:42:23,536 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:42:23,536 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 25 [2024-06-27 16:42:23,536 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:42:25,383 INFO L124 PetriNetUnfolderBase]: 4783/7132 cut-off events. [2024-06-27 16:42:25,384 INFO L125 PetriNetUnfolderBase]: For 170605/170605 co-relation queries the response was YES. [2024-06-27 16:42:25,429 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59962 conditions, 7132 events. 4783/7132 cut-off events. For 170605/170605 co-relation queries the response was YES. Maximal size of possible extension queue 446. Compared 39652 event pairs, 680 based on Foata normal form. 39/7171 useless extension candidates. Maximal degree in co-relation 59493. Up to 2441 conditions per place. [2024-06-27 16:42:25,460 INFO L140 encePairwiseOnDemand]: 16/25 looper letters, 579 selfloop transitions, 205 changer transitions 6/791 dead transitions. [2024-06-27 16:42:25,461 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 247 places, 791 transitions, 15688 flow [2024-06-27 16:42:25,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-06-27 16:42:25,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2024-06-27 16:42:25,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 234 transitions. [2024-06-27 16:42:25,473 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4926315789473684 [2024-06-27 16:42:25,473 INFO L175 Difference]: Start difference. First operand has 231 places, 533 transitions, 10186 flow. Second operand 19 states and 234 transitions. [2024-06-27 16:42:25,473 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 247 places, 791 transitions, 15688 flow [2024-06-27 16:42:26,550 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 241 places, 791 transitions, 15502 flow, removed 13 selfloop flow, removed 6 redundant places. [2024-06-27 16:42:26,561 INFO L231 Difference]: Finished difference. Result has 253 places, 589 transitions, 11672 flow [2024-06-27 16:42:26,561 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=25, PETRI_DIFFERENCE_MINUEND_FLOW=10020, PETRI_DIFFERENCE_MINUEND_PLACES=223, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=533, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=153, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=340, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=11672, PETRI_PLACES=253, PETRI_TRANSITIONS=589} [2024-06-27 16:42:26,562 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 225 predicate places. [2024-06-27 16:42:26,562 INFO L495 AbstractCegarLoop]: Abstraction has has 253 places, 589 transitions, 11672 flow [2024-06-27 16:42:26,562 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 6.0) internal successors, (90), 15 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) [2024-06-27 16:42:26,562 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:42:26,562 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 16:42:26,572 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2024-06-27 16:42:26,772 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:42:26,773 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-27 16:42:26,773 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:42:26,773 INFO L85 PathProgramCache]: Analyzing trace with hash 2121965245, now seen corresponding path program 6 times [2024-06-27 16:42:26,773 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:42:26,774 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1022033724] [2024-06-27 16:42:26,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:42:26,774 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:42:26,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:42:26,867 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 16:42:26,867 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:42:26,868 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1022033724] [2024-06-27 16:42:26,868 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1022033724] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 16:42:26,868 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 16:42:26,868 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 16:42:26,868 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [742494428] [2024-06-27 16:42:26,868 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 16:42:26,868 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 16:42:26,869 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:42:26,869 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 16:42:26,870 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-27 16:42:26,870 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 25 [2024-06-27 16:42:26,870 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 253 places, 589 transitions, 11672 flow. Second operand has 7 states, 7 states have (on average 6.571428571428571) internal successors, (46), 7 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:42:26,870 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:42:26,870 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 25 [2024-06-27 16:42:26,870 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:42:28,625 INFO L124 PetriNetUnfolderBase]: 5141/7609 cut-off events. [2024-06-27 16:42:28,625 INFO L125 PetriNetUnfolderBase]: For 227783/227783 co-relation queries the response was YES. [2024-06-27 16:42:28,673 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69835 conditions, 7609 events. 5141/7609 cut-off events. For 227783/227783 co-relation queries the response was YES. Maximal size of possible extension queue 472. Compared 41868 event pairs, 1065 based on Foata normal form. 3/7612 useless extension candidates. Maximal degree in co-relation 69330. Up to 5450 conditions per place. [2024-06-27 16:42:28,706 INFO L140 encePairwiseOnDemand]: 17/25 looper letters, 419 selfloop transitions, 331 changer transitions 7/758 dead transitions. [2024-06-27 16:42:28,706 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 259 places, 758 transitions, 16130 flow [2024-06-27 16:42:28,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 16:42:28,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 16:42:28,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 83 transitions. [2024-06-27 16:42:28,707 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4742857142857143 [2024-06-27 16:42:28,707 INFO L175 Difference]: Start difference. First operand has 253 places, 589 transitions, 11672 flow. Second operand 7 states and 83 transitions. [2024-06-27 16:42:28,707 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 259 places, 758 transitions, 16130 flow [2024-06-27 16:42:30,266 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 254 places, 758 transitions, 15715 flow, removed 70 selfloop flow, removed 5 redundant places. [2024-06-27 16:42:30,277 INFO L231 Difference]: Finished difference. Result has 259 places, 657 transitions, 13740 flow [2024-06-27 16:42:30,278 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=25, PETRI_DIFFERENCE_MINUEND_FLOW=11359, PETRI_DIFFERENCE_MINUEND_PLACES=248, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=589, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=263, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=298, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=13740, PETRI_PLACES=259, PETRI_TRANSITIONS=657} [2024-06-27 16:42:30,278 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 231 predicate places. [2024-06-27 16:42:30,279 INFO L495 AbstractCegarLoop]: Abstraction has has 259 places, 657 transitions, 13740 flow [2024-06-27 16:42:30,279 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 6.571428571428571) internal successors, (46), 7 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:42:30,279 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:42:30,279 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 16:42:30,279 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-27 16:42:30,279 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-27 16:42:30,280 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:42:30,280 INFO L85 PathProgramCache]: Analyzing trace with hash -1709730815, now seen corresponding path program 7 times [2024-06-27 16:42:30,280 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:42:30,280 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [355838762] [2024-06-27 16:42:30,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:42:30,280 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:42:30,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:42:30,359 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 16:42:30,359 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:42:30,359 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [355838762] [2024-06-27 16:42:30,359 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [355838762] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 16:42:30,359 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 16:42:30,359 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 16:42:30,360 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [604986813] [2024-06-27 16:42:30,360 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 16:42:30,360 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 16:42:30,360 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:42:30,360 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 16:42:30,361 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-27 16:42:30,361 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 25 [2024-06-27 16:42:30,361 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 259 places, 657 transitions, 13740 flow. Second operand has 7 states, 7 states have (on average 6.571428571428571) internal successors, (46), 7 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:42:30,361 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:42:30,361 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 25 [2024-06-27 16:42:30,361 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:42:32,227 INFO L124 PetriNetUnfolderBase]: 5223/7794 cut-off events. [2024-06-27 16:42:32,227 INFO L125 PetriNetUnfolderBase]: For 243172/243172 co-relation queries the response was YES. [2024-06-27 16:42:32,285 INFO L83 FinitePrefix]: Finished finitePrefix Result has 74307 conditions, 7794 events. 5223/7794 cut-off events. For 243172/243172 co-relation queries the response was YES. Maximal size of possible extension queue 497. Compared 43982 event pairs, 1444 based on Foata normal form. 24/7818 useless extension candidates. Maximal degree in co-relation 73797. Up to 6713 conditions per place. [2024-06-27 16:42:32,330 INFO L140 encePairwiseOnDemand]: 17/25 looper letters, 579 selfloop transitions, 167 changer transitions 12/759 dead transitions. [2024-06-27 16:42:32,330 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 264 places, 759 transitions, 17206 flow [2024-06-27 16:42:32,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 16:42:32,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 16:42:32,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 86 transitions. [2024-06-27 16:42:32,331 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49142857142857144 [2024-06-27 16:42:32,331 INFO L175 Difference]: Start difference. First operand has 259 places, 657 transitions, 13740 flow. Second operand 7 states and 86 transitions. [2024-06-27 16:42:32,332 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 264 places, 759 transitions, 17206 flow [2024-06-27 16:42:33,850 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 262 places, 759 transitions, 16751 flow, removed 74 selfloop flow, removed 2 redundant places. [2024-06-27 16:42:33,954 INFO L231 Difference]: Finished difference. Result has 266 places, 701 transitions, 14861 flow [2024-06-27 16:42:33,955 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=25, PETRI_DIFFERENCE_MINUEND_FLOW=13330, PETRI_DIFFERENCE_MINUEND_PLACES=256, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=657, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=123, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=526, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=14861, PETRI_PLACES=266, PETRI_TRANSITIONS=701} [2024-06-27 16:42:33,956 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 238 predicate places. [2024-06-27 16:42:33,956 INFO L495 AbstractCegarLoop]: Abstraction has has 266 places, 701 transitions, 14861 flow [2024-06-27 16:42:33,957 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 6.571428571428571) internal successors, (46), 7 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:42:33,957 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:42:33,957 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 16:42:33,957 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-06-27 16:42:33,972 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-27 16:42:33,973 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:42:33,973 INFO L85 PathProgramCache]: Analyzing trace with hash 1662095062, now seen corresponding path program 9 times [2024-06-27 16:42:33,973 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:42:33,973 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [339525619] [2024-06-27 16:42:33,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:42:33,974 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:42:34,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:42:34,088 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 16:42:34,088 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:42:34,088 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [339525619] [2024-06-27 16:42:34,088 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [339525619] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 16:42:34,088 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [287788020] [2024-06-27 16:42:34,089 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-06-27 16:42:34,089 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:42:34,089 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 16:42:34,109 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) [2024-06-27 16:42:34,172 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-06-27 16:42:34,235 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-06-27 16:42:34,235 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 16:42:34,236 INFO L262 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 13 conjunts are in the unsatisfiable core [2024-06-27 16:42:34,237 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 16:42:34,377 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 16:42:34,377 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 16:42:34,521 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 16:42:34,522 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [287788020] provided 1 perfect and 1 imperfect interpolant sequences [2024-06-27 16:42:34,522 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-06-27 16:42:34,522 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [7, 7] total 16 [2024-06-27 16:42:34,522 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [420969550] [2024-06-27 16:42:34,522 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 16:42:34,522 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 16:42:34,522 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:42:34,523 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 16:42:34,523 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=179, Unknown=0, NotChecked=0, Total=240 [2024-06-27 16:42:34,523 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 25 [2024-06-27 16:42:34,523 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 266 places, 701 transitions, 14861 flow. Second operand has 6 states, 6 states have (on average 7.0) internal successors, (42), 6 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) [2024-06-27 16:42:34,523 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:42:34,523 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 25 [2024-06-27 16:42:34,524 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:42:36,593 INFO L124 PetriNetUnfolderBase]: 5183/7720 cut-off events. [2024-06-27 16:42:36,593 INFO L125 PetriNetUnfolderBase]: For 231666/231666 co-relation queries the response was YES. [2024-06-27 16:42:36,646 INFO L83 FinitePrefix]: Finished finitePrefix Result has 72921 conditions, 7720 events. 5183/7720 cut-off events. For 231666/231666 co-relation queries the response was YES. Maximal size of possible extension queue 489. Compared 43128 event pairs, 1083 based on Foata normal form. 18/7738 useless extension candidates. Maximal degree in co-relation 72606. Up to 4104 conditions per place. [2024-06-27 16:42:36,679 INFO L140 encePairwiseOnDemand]: 18/25 looper letters, 622 selfloop transitions, 133 changer transitions 2/758 dead transitions. [2024-06-27 16:42:36,679 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 270 places, 758 transitions, 17043 flow [2024-06-27 16:42:36,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 16:42:36,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 16:42:36,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 87 transitions. [2024-06-27 16:42:36,680 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.58 [2024-06-27 16:42:36,680 INFO L175 Difference]: Start difference. First operand has 266 places, 701 transitions, 14861 flow. Second operand 6 states and 87 transitions. [2024-06-27 16:42:36,680 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 270 places, 758 transitions, 17043 flow [2024-06-27 16:42:38,059 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 268 places, 758 transitions, 16749 flow, removed 84 selfloop flow, removed 2 redundant places. [2024-06-27 16:42:38,071 INFO L231 Difference]: Finished difference. Result has 269 places, 701 transitions, 14846 flow [2024-06-27 16:42:38,072 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=25, PETRI_DIFFERENCE_MINUEND_FLOW=14571, PETRI_DIFFERENCE_MINUEND_PLACES=263, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=701, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=133, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=568, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=14846, PETRI_PLACES=269, PETRI_TRANSITIONS=701} [2024-06-27 16:42:38,074 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 241 predicate places. [2024-06-27 16:42:38,074 INFO L495 AbstractCegarLoop]: Abstraction has has 269 places, 701 transitions, 14846 flow [2024-06-27 16:42:38,074 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 7.0) internal successors, (42), 6 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) [2024-06-27 16:42:38,074 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:42:38,074 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 16:42:38,085 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2024-06-27 16:42:38,285 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:42:38,286 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-27 16:42:38,287 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:42:38,288 INFO L85 PathProgramCache]: Analyzing trace with hash 2143275138, now seen corresponding path program 10 times [2024-06-27 16:42:38,288 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:42:38,288 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1000510434] [2024-06-27 16:42:38,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:42:38,289 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:42:38,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:42:38,406 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 16:42:38,406 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:42:38,406 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1000510434] [2024-06-27 16:42:38,406 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1000510434] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 16:42:38,406 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 16:42:38,407 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 16:42:38,407 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1314791713] [2024-06-27 16:42:38,407 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 16:42:38,407 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 16:42:38,408 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:42:38,408 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 16:42:38,408 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2024-06-27 16:42:38,408 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 25 [2024-06-27 16:42:38,409 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 269 places, 701 transitions, 14846 flow. Second operand has 7 states, 7 states have (on average 6.571428571428571) internal successors, (46), 7 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:42:38,409 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:42:38,409 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 25 [2024-06-27 16:42:38,409 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:42:40,686 INFO L124 PetriNetUnfolderBase]: 5401/8155 cut-off events. [2024-06-27 16:42:40,686 INFO L125 PetriNetUnfolderBase]: For 238543/238543 co-relation queries the response was YES. [2024-06-27 16:42:40,750 INFO L83 FinitePrefix]: Finished finitePrefix Result has 76078 conditions, 8155 events. 5401/8155 cut-off events. For 238543/238543 co-relation queries the response was YES. Maximal size of possible extension queue 541. Compared 47028 event pairs, 425 based on Foata normal form. 37/8192 useless extension candidates. Maximal degree in co-relation 75537. Up to 2829 conditions per place. [2024-06-27 16:42:40,795 INFO L140 encePairwiseOnDemand]: 16/25 looper letters, 485 selfloop transitions, 442 changer transitions 5/933 dead transitions. [2024-06-27 16:42:40,795 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 278 places, 933 transitions, 20870 flow [2024-06-27 16:42:40,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 16:42:40,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 16:42:40,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 135 transitions. [2024-06-27 16:42:40,797 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.54 [2024-06-27 16:42:40,797 INFO L175 Difference]: Start difference. First operand has 269 places, 701 transitions, 14846 flow. Second operand 10 states and 135 transitions. [2024-06-27 16:42:40,797 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 278 places, 933 transitions, 20870 flow [2024-06-27 16:42:42,779 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 275 places, 933 transitions, 20683 flow, removed 4 selfloop flow, removed 3 redundant places. [2024-06-27 16:42:42,792 INFO L231 Difference]: Finished difference. Result has 280 places, 768 transitions, 17699 flow [2024-06-27 16:42:42,793 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=25, PETRI_DIFFERENCE_MINUEND_FLOW=14701, PETRI_DIFFERENCE_MINUEND_PLACES=266, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=701, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=385, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=289, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=17699, PETRI_PLACES=280, PETRI_TRANSITIONS=768} [2024-06-27 16:42:42,793 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 252 predicate places. [2024-06-27 16:42:42,794 INFO L495 AbstractCegarLoop]: Abstraction has has 280 places, 768 transitions, 17699 flow [2024-06-27 16:42:42,794 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 6.571428571428571) internal successors, (46), 7 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:42:42,794 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:42:42,794 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 16:42:42,794 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-06-27 16:42:42,794 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-27 16:42:42,795 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:42:42,795 INFO L85 PathProgramCache]: Analyzing trace with hash 1361650664, now seen corresponding path program 11 times [2024-06-27 16:42:42,795 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:42:42,795 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [273942575] [2024-06-27 16:42:42,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:42:42,795 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:42:42,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:42:42,884 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 16:42:42,884 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:42:42,885 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [273942575] [2024-06-27 16:42:42,885 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [273942575] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 16:42:42,885 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [175836350] [2024-06-27 16:42:42,885 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-06-27 16:42:42,885 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:42:42,885 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 16:42:42,886 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-27 16:42:42,901 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-06-27 16:42:42,954 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-06-27 16:42:42,954 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 16:42:42,955 INFO L262 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 14 conjunts are in the unsatisfiable core [2024-06-27 16:42:42,956 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 16:42:43,045 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 16:42:43,045 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 16:42:43,131 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 16:42:43,132 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [175836350] provided 1 perfect and 1 imperfect interpolant sequences [2024-06-27 16:42:43,132 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-06-27 16:42:43,132 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [7, 8] total 15 [2024-06-27 16:42:43,132 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1965626490] [2024-06-27 16:42:43,132 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 16:42:43,132 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 16:42:43,132 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:42:43,133 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 16:42:43,133 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2024-06-27 16:42:43,133 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 25 [2024-06-27 16:42:43,133 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 280 places, 768 transitions, 17699 flow. Second operand has 6 states, 6 states have (on average 7.0) internal successors, (42), 6 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) [2024-06-27 16:42:43,133 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:42:43,133 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 25 [2024-06-27 16:42:43,133 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:42:45,197 INFO L124 PetriNetUnfolderBase]: 5379/8124 cut-off events. [2024-06-27 16:42:45,197 INFO L125 PetriNetUnfolderBase]: For 262179/262179 co-relation queries the response was YES. [2024-06-27 16:42:45,258 INFO L83 FinitePrefix]: Finished finitePrefix Result has 78997 conditions, 8124 events. 5379/8124 cut-off events. For 262179/262179 co-relation queries the response was YES. Maximal size of possible extension queue 530. Compared 46923 event pairs, 1089 based on Foata normal form. 18/8142 useless extension candidates. Maximal degree in co-relation 78443. Up to 4166 conditions per place. [2024-06-27 16:42:45,295 INFO L140 encePairwiseOnDemand]: 18/25 looper letters, 664 selfloop transitions, 183 changer transitions 2/850 dead transitions. [2024-06-27 16:42:45,295 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 285 places, 850 transitions, 20635 flow [2024-06-27 16:42:45,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 16:42:45,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 16:42:45,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 85 transitions. [2024-06-27 16:42:45,296 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5666666666666667 [2024-06-27 16:42:45,297 INFO L175 Difference]: Start difference. First operand has 280 places, 768 transitions, 17699 flow. Second operand 6 states and 85 transitions. [2024-06-27 16:42:45,297 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 285 places, 850 transitions, 20635 flow [2024-06-27 16:42:47,482 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 284 places, 850 transitions, 20188 flow, removed 122 selfloop flow, removed 1 redundant places. [2024-06-27 16:42:47,496 INFO L231 Difference]: Finished difference. Result has 287 places, 774 transitions, 17964 flow [2024-06-27 16:42:47,496 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=25, PETRI_DIFFERENCE_MINUEND_FLOW=17284, PETRI_DIFFERENCE_MINUEND_PLACES=279, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=768, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=177, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=585, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=17964, PETRI_PLACES=287, PETRI_TRANSITIONS=774} [2024-06-27 16:42:47,497 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 259 predicate places. [2024-06-27 16:42:47,497 INFO L495 AbstractCegarLoop]: Abstraction has has 287 places, 774 transitions, 17964 flow [2024-06-27 16:42:47,497 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 7.0) internal successors, (42), 6 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) [2024-06-27 16:42:47,497 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:42:47,497 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 16:42:47,510 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2024-06-27 16:42:47,708 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:42:47,708 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-27 16:42:47,709 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:42:47,709 INFO L85 PathProgramCache]: Analyzing trace with hash 494536977, now seen corresponding path program 8 times [2024-06-27 16:42:47,709 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:42:47,709 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1510356065] [2024-06-27 16:42:47,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:42:47,709 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:42:47,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:42:47,807 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 16:42:47,808 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:42:47,808 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1510356065] [2024-06-27 16:42:47,808 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1510356065] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 16:42:47,808 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 16:42:47,808 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 16:42:47,808 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [784069394] [2024-06-27 16:42:47,809 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 16:42:47,809 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 16:42:47,809 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:42:47,809 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 16:42:47,809 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-27 16:42:47,809 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 25 [2024-06-27 16:42:47,810 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 287 places, 774 transitions, 17964 flow. Second operand has 7 states, 7 states have (on average 6.571428571428571) internal successors, (46), 7 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:42:47,810 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:42:47,810 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 25 [2024-06-27 16:42:47,810 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:42:50,103 INFO L124 PetriNetUnfolderBase]: 5443/8220 cut-off events. [2024-06-27 16:42:50,103 INFO L125 PetriNetUnfolderBase]: For 255672/255672 co-relation queries the response was YES. [2024-06-27 16:42:50,164 INFO L83 FinitePrefix]: Finished finitePrefix Result has 80477 conditions, 8220 events. 5443/8220 cut-off events. For 255672/255672 co-relation queries the response was YES. Maximal size of possible extension queue 539. Compared 47623 event pairs, 1305 based on Foata normal form. 3/8223 useless extension candidates. Maximal degree in co-relation 79908. Up to 5100 conditions per place. [2024-06-27 16:42:50,201 INFO L140 encePairwiseOnDemand]: 17/25 looper letters, 612 selfloop transitions, 216 changer transitions 8/837 dead transitions. [2024-06-27 16:42:50,201 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 293 places, 837 transitions, 20611 flow [2024-06-27 16:42:50,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 16:42:50,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 16:42:50,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 92 transitions. [2024-06-27 16:42:50,203 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5257142857142857 [2024-06-27 16:42:50,203 INFO L175 Difference]: Start difference. First operand has 287 places, 774 transitions, 17964 flow. Second operand 7 states and 92 transitions. [2024-06-27 16:42:50,203 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 293 places, 837 transitions, 20611 flow [2024-06-27 16:42:52,015 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 292 places, 837 transitions, 20503 flow, removed 14 selfloop flow, removed 1 redundant places. [2024-06-27 16:42:52,030 INFO L231 Difference]: Finished difference. Result has 295 places, 783 transitions, 18603 flow [2024-06-27 16:42:52,030 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=25, PETRI_DIFFERENCE_MINUEND_FLOW=17856, PETRI_DIFFERENCE_MINUEND_PLACES=286, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=774, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=207, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=558, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=18603, PETRI_PLACES=295, PETRI_TRANSITIONS=783} [2024-06-27 16:42:52,030 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 267 predicate places. [2024-06-27 16:42:52,031 INFO L495 AbstractCegarLoop]: Abstraction has has 295 places, 783 transitions, 18603 flow [2024-06-27 16:42:52,031 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 6.571428571428571) internal successors, (46), 7 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:42:52,031 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:42:52,031 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 16:42:52,031 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-06-27 16:42:52,031 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-27 16:42:52,032 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:42:52,032 INFO L85 PathProgramCache]: Analyzing trace with hash 326095273, now seen corresponding path program 9 times [2024-06-27 16:42:52,032 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:42:52,032 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1489378205] [2024-06-27 16:42:52,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:42:52,032 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:42:52,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:42:52,099 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 16:42:52,099 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:42:52,099 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1489378205] [2024-06-27 16:42:52,100 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1489378205] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 16:42:52,100 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 16:42:52,100 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 16:42:52,100 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1326195862] [2024-06-27 16:42:52,100 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 16:42:52,100 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 16:42:52,100 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:42:52,101 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 16:42:52,101 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-27 16:42:52,101 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 25 [2024-06-27 16:42:52,101 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 295 places, 783 transitions, 18603 flow. Second operand has 7 states, 7 states have (on average 6.571428571428571) internal successors, (46), 7 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:42:52,101 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:42:52,101 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 25 [2024-06-27 16:42:52,101 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:42:54,271 INFO L124 PetriNetUnfolderBase]: 5445/8276 cut-off events. [2024-06-27 16:42:54,272 INFO L125 PetriNetUnfolderBase]: For 264695/264695 co-relation queries the response was YES. [2024-06-27 16:42:54,333 INFO L83 FinitePrefix]: Finished finitePrefix Result has 82221 conditions, 8276 events. 5445/8276 cut-off events. For 264695/264695 co-relation queries the response was YES. Maximal size of possible extension queue 543. Compared 48589 event pairs, 1317 based on Foata normal form. 21/8297 useless extension candidates. Maximal degree in co-relation 82035. Up to 5100 conditions per place. [2024-06-27 16:42:54,369 INFO L140 encePairwiseOnDemand]: 17/25 looper letters, 620 selfloop transitions, 211 changer transitions 12/844 dead transitions. [2024-06-27 16:42:54,370 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 300 places, 844 transitions, 21146 flow [2024-06-27 16:42:54,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 16:42:54,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 16:42:54,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 95 transitions. [2024-06-27 16:42:54,371 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5428571428571428 [2024-06-27 16:42:54,371 INFO L175 Difference]: Start difference. First operand has 295 places, 783 transitions, 18603 flow. Second operand 7 states and 95 transitions. [2024-06-27 16:42:54,371 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 300 places, 844 transitions, 21146 flow [2024-06-27 16:42:56,242 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 297 places, 844 transitions, 20857 flow, removed 16 selfloop flow, removed 3 redundant places. [2024-06-27 16:42:56,256 INFO L231 Difference]: Finished difference. Result has 299 places, 780 transitions, 18689 flow [2024-06-27 16:42:56,257 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=25, PETRI_DIFFERENCE_MINUEND_FLOW=18322, PETRI_DIFFERENCE_MINUEND_PLACES=291, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=783, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=211, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=572, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=18689, PETRI_PLACES=299, PETRI_TRANSITIONS=780} [2024-06-27 16:42:56,257 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 271 predicate places. [2024-06-27 16:42:56,258 INFO L495 AbstractCegarLoop]: Abstraction has has 299 places, 780 transitions, 18689 flow [2024-06-27 16:42:56,258 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 6.571428571428571) internal successors, (46), 7 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:42:56,258 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:42:56,258 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 16:42:56,258 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-06-27 16:42:56,258 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-27 16:42:56,259 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:42:56,259 INFO L85 PathProgramCache]: Analyzing trace with hash -635418947, now seen corresponding path program 10 times [2024-06-27 16:42:56,259 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:42:56,259 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [787854553] [2024-06-27 16:42:56,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:42:56,259 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:42:56,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:42:56,329 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 16:42:56,330 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:42:56,330 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [787854553] [2024-06-27 16:42:56,330 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [787854553] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 16:42:56,330 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [569593462] [2024-06-27 16:42:56,330 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-06-27 16:42:56,330 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:42:56,331 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 16:42:56,331 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-27 16:42:56,333 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-06-27 16:42:56,398 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-06-27 16:42:56,398 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 16:42:56,399 INFO L262 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 12 conjunts are in the unsatisfiable core [2024-06-27 16:42:56,400 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 16:42:56,454 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 16:42:56,454 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 16:42:56,569 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 16:42:56,570 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [569593462] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 16:42:56,570 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 16:42:56,570 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 8] total 15 [2024-06-27 16:42:56,570 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2054031863] [2024-06-27 16:42:56,570 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 16:42:56,570 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-06-27 16:42:56,571 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:42:56,571 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-06-27 16:42:56,571 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=152, Unknown=0, NotChecked=0, Total=210 [2024-06-27 16:42:56,571 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 25 [2024-06-27 16:42:56,572 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 299 places, 780 transitions, 18689 flow. Second operand has 15 states, 15 states have (on average 6.066666666666666) internal successors, (91), 15 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:42:56,572 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:42:56,572 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 25 [2024-06-27 16:42:56,572 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:42:59,260 INFO L124 PetriNetUnfolderBase]: 5594/8482 cut-off events. [2024-06-27 16:42:59,260 INFO L125 PetriNetUnfolderBase]: For 269095/269095 co-relation queries the response was YES. [2024-06-27 16:42:59,326 INFO L83 FinitePrefix]: Finished finitePrefix Result has 84819 conditions, 8482 events. 5594/8482 cut-off events. For 269095/269095 co-relation queries the response was YES. Maximal size of possible extension queue 560. Compared 49889 event pairs, 836 based on Foata normal form. 25/8507 useless extension candidates. Maximal degree in co-relation 84574. Up to 2938 conditions per place. [2024-06-27 16:42:59,366 INFO L140 encePairwiseOnDemand]: 16/25 looper letters, 711 selfloop transitions, 320 changer transitions 4/1036 dead transitions. [2024-06-27 16:42:59,366 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 318 places, 1036 transitions, 25665 flow [2024-06-27 16:42:59,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2024-06-27 16:42:59,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2024-06-27 16:42:59,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 246 transitions. [2024-06-27 16:42:59,367 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4685714285714286 [2024-06-27 16:42:59,368 INFO L175 Difference]: Start difference. First operand has 299 places, 780 transitions, 18689 flow. Second operand 21 states and 246 transitions. [2024-06-27 16:42:59,368 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 318 places, 1036 transitions, 25665 flow [2024-06-27 16:43:01,210 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 313 places, 1036 transitions, 25231 flow, removed 6 selfloop flow, removed 5 redundant places. [2024-06-27 16:43:01,227 INFO L231 Difference]: Finished difference. Result has 324 places, 832 transitions, 20390 flow [2024-06-27 16:43:01,228 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=25, PETRI_DIFFERENCE_MINUEND_FLOW=18257, PETRI_DIFFERENCE_MINUEND_PLACES=293, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=780, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=271, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=466, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=20390, PETRI_PLACES=324, PETRI_TRANSITIONS=832} [2024-06-27 16:43:01,228 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 296 predicate places. [2024-06-27 16:43:01,228 INFO L495 AbstractCegarLoop]: Abstraction has has 324 places, 832 transitions, 20390 flow [2024-06-27 16:43:01,228 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 6.066666666666666) internal successors, (91), 15 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:43:01,228 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:43:01,229 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 16:43:01,240 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2024-06-27 16:43:01,439 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2024-06-27 16:43:01,440 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-27 16:43:01,440 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:43:01,440 INFO L85 PathProgramCache]: Analyzing trace with hash -1878289090, now seen corresponding path program 12 times [2024-06-27 16:43:01,440 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:43:01,440 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [549868477] [2024-06-27 16:43:01,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:43:01,440 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:43:01,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:43:01,653 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 16:43:01,653 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:43:01,653 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [549868477] [2024-06-27 16:43:01,654 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [549868477] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 16:43:01,654 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 16:43:01,654 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 16:43:01,654 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1503686659] [2024-06-27 16:43:01,654 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 16:43:01,654 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 16:43:01,654 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:43:01,655 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 16:43:01,655 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-27 16:43:01,655 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 25 [2024-06-27 16:43:01,655 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 324 places, 832 transitions, 20390 flow. Second operand has 7 states, 7 states have (on average 6.571428571428571) internal successors, (46), 7 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:43:01,655 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:43:01,655 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 25 [2024-06-27 16:43:01,656 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:43:03,923 INFO L124 PetriNetUnfolderBase]: 5564/8416 cut-off events. [2024-06-27 16:43:03,923 INFO L125 PetriNetUnfolderBase]: For 279228/279228 co-relation queries the response was YES. [2024-06-27 16:43:03,998 INFO L83 FinitePrefix]: Finished finitePrefix Result has 86954 conditions, 8416 events. 5564/8416 cut-off events. For 279228/279228 co-relation queries the response was YES. Maximal size of possible extension queue 566. Compared 49252 event pairs, 885 based on Foata normal form. 22/8438 useless extension candidates. Maximal degree in co-relation 86530. Up to 4269 conditions per place. [2024-06-27 16:43:04,040 INFO L140 encePairwiseOnDemand]: 16/25 looper letters, 625 selfloop transitions, 289 changer transitions 2/917 dead transitions. [2024-06-27 16:43:04,040 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 330 places, 917 transitions, 23404 flow [2024-06-27 16:43:04,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 16:43:04,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 16:43:04,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 101 transitions. [2024-06-27 16:43:04,041 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5771428571428572 [2024-06-27 16:43:04,041 INFO L175 Difference]: Start difference. First operand has 324 places, 832 transitions, 20390 flow. Second operand 7 states and 101 transitions. [2024-06-27 16:43:04,041 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 330 places, 917 transitions, 23404 flow [2024-06-27 16:43:06,319 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 323 places, 917 transitions, 22868 flow, removed 65 selfloop flow, removed 7 redundant places. [2024-06-27 16:43:06,335 INFO L231 Difference]: Finished difference. Result has 323 places, 830 transitions, 20420 flow [2024-06-27 16:43:06,337 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=25, PETRI_DIFFERENCE_MINUEND_FLOW=19842, PETRI_DIFFERENCE_MINUEND_PLACES=317, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=830, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=289, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=541, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=20420, PETRI_PLACES=323, PETRI_TRANSITIONS=830} [2024-06-27 16:43:06,337 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 295 predicate places. [2024-06-27 16:43:06,337 INFO L495 AbstractCegarLoop]: Abstraction has has 323 places, 830 transitions, 20420 flow [2024-06-27 16:43:06,337 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 6.571428571428571) internal successors, (46), 7 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:43:06,337 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:43:06,338 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 16:43:06,338 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-06-27 16:43:06,338 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-27 16:43:06,338 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:43:06,338 INFO L85 PathProgramCache]: Analyzing trace with hash 752846590, now seen corresponding path program 13 times [2024-06-27 16:43:06,338 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:43:06,338 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1461937731] [2024-06-27 16:43:06,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:43:06,339 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:43:06,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:43:06,527 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 16:43:06,527 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:43:06,527 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1461937731] [2024-06-27 16:43:06,528 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1461937731] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 16:43:06,528 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 16:43:06,528 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 16:43:06,528 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1970117357] [2024-06-27 16:43:06,528 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 16:43:06,528 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 16:43:06,528 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:43:06,529 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 16:43:06,529 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-27 16:43:06,529 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 25 [2024-06-27 16:43:06,529 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 323 places, 830 transitions, 20420 flow. Second operand has 7 states, 7 states have (on average 6.571428571428571) internal successors, (46), 7 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:43:06,529 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:43:06,529 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 25 [2024-06-27 16:43:06,530 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:43:08,788 INFO L124 PetriNetUnfolderBase]: 5568/8424 cut-off events. [2024-06-27 16:43:08,788 INFO L125 PetriNetUnfolderBase]: For 282867/282867 co-relation queries the response was YES. [2024-06-27 16:43:08,861 INFO L83 FinitePrefix]: Finished finitePrefix Result has 87240 conditions, 8424 events. 5568/8424 cut-off events. For 282867/282867 co-relation queries the response was YES. Maximal size of possible extension queue 566. Compared 49419 event pairs, 1658 based on Foata normal form. 2/8426 useless extension candidates. Maximal degree in co-relation 86824. Up to 7398 conditions per place. [2024-06-27 16:43:08,903 INFO L140 encePairwiseOnDemand]: 16/25 looper letters, 678 selfloop transitions, 177 changer transitions 2/858 dead transitions. [2024-06-27 16:43:08,903 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 329 places, 858 transitions, 22496 flow [2024-06-27 16:43:08,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 16:43:08,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 16:43:08,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 84 transitions. [2024-06-27 16:43:08,904 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48 [2024-06-27 16:43:08,904 INFO L175 Difference]: Start difference. First operand has 323 places, 830 transitions, 20420 flow. Second operand 7 states and 84 transitions. [2024-06-27 16:43:08,905 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 329 places, 858 transitions, 22496 flow [2024-06-27 16:43:11,152 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 324 places, 858 transitions, 21908 flow, removed 2 selfloop flow, removed 5 redundant places. [2024-06-27 16:43:11,168 INFO L231 Difference]: Finished difference. Result has 326 places, 837 transitions, 20379 flow [2024-06-27 16:43:11,168 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=25, PETRI_DIFFERENCE_MINUEND_FLOW=19838, PETRI_DIFFERENCE_MINUEND_PLACES=318, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=830, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=170, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=657, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=20379, PETRI_PLACES=326, PETRI_TRANSITIONS=837} [2024-06-27 16:43:11,169 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 298 predicate places. [2024-06-27 16:43:11,169 INFO L495 AbstractCegarLoop]: Abstraction has has 326 places, 837 transitions, 20379 flow [2024-06-27 16:43:11,169 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 6.571428571428571) internal successors, (46), 7 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:43:11,169 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:43:11,169 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 16:43:11,169 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-06-27 16:43:11,170 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-27 16:43:11,170 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:43:11,170 INFO L85 PathProgramCache]: Analyzing trace with hash -1129145018, now seen corresponding path program 14 times [2024-06-27 16:43:11,170 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:43:11,170 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [886600547] [2024-06-27 16:43:11,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:43:11,170 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:43:11,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:43:11,253 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 16:43:11,253 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:43:11,253 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [886600547] [2024-06-27 16:43:11,253 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [886600547] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 16:43:11,254 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 16:43:11,254 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 16:43:11,254 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1982561730] [2024-06-27 16:43:11,254 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 16:43:11,254 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 16:43:11,254 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:43:11,255 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 16:43:11,255 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-27 16:43:11,255 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 25 [2024-06-27 16:43:11,255 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 326 places, 837 transitions, 20379 flow. Second operand has 7 states, 7 states have (on average 6.571428571428571) internal successors, (46), 7 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:43:11,255 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:43:11,255 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 25 [2024-06-27 16:43:11,255 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:43:13,744 INFO L124 PetriNetUnfolderBase]: 5833/8781 cut-off events. [2024-06-27 16:43:13,745 INFO L125 PetriNetUnfolderBase]: For 295000/295000 co-relation queries the response was YES. [2024-06-27 16:43:13,824 INFO L83 FinitePrefix]: Finished finitePrefix Result has 90696 conditions, 8781 events. 5833/8781 cut-off events. For 295000/295000 co-relation queries the response was YES. Maximal size of possible extension queue 591. Compared 51406 event pairs, 1635 based on Foata normal form. 15/8796 useless extension candidates. Maximal degree in co-relation 90278. Up to 7471 conditions per place. [2024-06-27 16:43:13,868 INFO L140 encePairwiseOnDemand]: 16/25 looper letters, 702 selfloop transitions, 213 changer transitions 0/916 dead transitions. [2024-06-27 16:43:13,869 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 331 places, 916 transitions, 23562 flow [2024-06-27 16:43:13,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 16:43:13,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 16:43:13,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 96 transitions. [2024-06-27 16:43:13,870 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5485714285714286 [2024-06-27 16:43:13,870 INFO L175 Difference]: Start difference. First operand has 326 places, 837 transitions, 20379 flow. Second operand 7 states and 96 transitions. [2024-06-27 16:43:13,870 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 331 places, 916 transitions, 23562 flow [2024-06-27 16:43:16,202 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 328 places, 916 transitions, 23206 flow, removed 4 selfloop flow, removed 3 redundant places. [2024-06-27 16:43:16,217 INFO L231 Difference]: Finished difference. Result has 331 places, 862 transitions, 21278 flow [2024-06-27 16:43:16,218 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=25, PETRI_DIFFERENCE_MINUEND_FLOW=20023, PETRI_DIFFERENCE_MINUEND_PLACES=322, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=837, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=189, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=626, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=21278, PETRI_PLACES=331, PETRI_TRANSITIONS=862} [2024-06-27 16:43:16,218 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 303 predicate places. [2024-06-27 16:43:16,218 INFO L495 AbstractCegarLoop]: Abstraction has has 331 places, 862 transitions, 21278 flow [2024-06-27 16:43:16,218 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 6.571428571428571) internal successors, (46), 7 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:43:16,218 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:43:16,218 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 16:43:16,219 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-06-27 16:43:16,219 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-27 16:43:16,219 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:43:16,219 INFO L85 PathProgramCache]: Analyzing trace with hash -809204988, now seen corresponding path program 15 times [2024-06-27 16:43:16,219 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:43:16,219 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1775959731] [2024-06-27 16:43:16,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:43:16,220 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:43:16,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:43:16,288 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 16:43:16,288 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:43:16,289 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1775959731] [2024-06-27 16:43:16,289 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1775959731] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 16:43:16,289 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1800556618] [2024-06-27 16:43:16,289 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-06-27 16:43:16,289 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:43:16,289 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 16:43:16,290 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-27 16:43:16,291 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-06-27 16:43:16,361 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-06-27 16:43:16,361 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 16:43:16,361 INFO L262 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 14 conjunts are in the unsatisfiable core [2024-06-27 16:43:16,362 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 16:43:16,420 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 16:43:16,420 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 16:43:16,546 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 16:43:16,546 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1800556618] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 16:43:16,546 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 16:43:16,546 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 7] total 14 [2024-06-27 16:43:16,546 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [597370196] [2024-06-27 16:43:16,547 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 16:43:16,547 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-06-27 16:43:16,547 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:43:16,547 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-06-27 16:43:16,547 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2024-06-27 16:43:16,548 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 25 [2024-06-27 16:43:16,548 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 331 places, 862 transitions, 21278 flow. Second operand has 14 states, 14 states have (on average 6.285714285714286) internal successors, (88), 14 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:43:16,548 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:43:16,548 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 25 [2024-06-27 16:43:16,548 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:43:19,465 INFO L124 PetriNetUnfolderBase]: 6350/9657 cut-off events. [2024-06-27 16:43:19,465 INFO L125 PetriNetUnfolderBase]: For 333286/333286 co-relation queries the response was YES. [2024-06-27 16:43:19,566 INFO L83 FinitePrefix]: Finished finitePrefix Result has 99890 conditions, 9657 events. 6350/9657 cut-off events. For 333286/333286 co-relation queries the response was YES. Maximal size of possible extension queue 663. Compared 58704 event pairs, 1512 based on Foata normal form. 30/9687 useless extension candidates. Maximal degree in co-relation 99469. Up to 7394 conditions per place. [2024-06-27 16:43:19,851 INFO L140 encePairwiseOnDemand]: 16/25 looper letters, 680 selfloop transitions, 400 changer transitions 2/1083 dead transitions. [2024-06-27 16:43:19,852 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 349 places, 1083 transitions, 27435 flow [2024-06-27 16:43:19,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-06-27 16:43:19,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2024-06-27 16:43:19,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 226 transitions. [2024-06-27 16:43:19,856 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47578947368421054 [2024-06-27 16:43:19,856 INFO L175 Difference]: Start difference. First operand has 331 places, 862 transitions, 21278 flow. Second operand 19 states and 226 transitions. [2024-06-27 16:43:19,856 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 349 places, 1083 transitions, 27435 flow [2024-06-27 16:43:22,246 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 347 places, 1083 transitions, 27032 flow, removed 99 selfloop flow, removed 2 redundant places. [2024-06-27 16:43:22,265 INFO L231 Difference]: Finished difference. Result has 359 places, 964 transitions, 24583 flow [2024-06-27 16:43:22,266 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=25, PETRI_DIFFERENCE_MINUEND_FLOW=20896, PETRI_DIFFERENCE_MINUEND_PLACES=329, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=862, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=312, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=499, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=24583, PETRI_PLACES=359, PETRI_TRANSITIONS=964} [2024-06-27 16:43:22,266 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 331 predicate places. [2024-06-27 16:43:22,266 INFO L495 AbstractCegarLoop]: Abstraction has has 359 places, 964 transitions, 24583 flow [2024-06-27 16:43:22,267 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 6.285714285714286) internal successors, (88), 14 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:43:22,267 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:43:22,267 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 16:43:22,277 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2024-06-27 16:43:22,468 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2024-06-27 16:43:22,468 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-27 16:43:22,470 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:43:22,470 INFO L85 PathProgramCache]: Analyzing trace with hash -1912687246, now seen corresponding path program 16 times [2024-06-27 16:43:22,470 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:43:22,470 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [659943920] [2024-06-27 16:43:22,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:43:22,593 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:43:22,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:43:22,723 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 16:43:22,723 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:43:22,723 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [659943920] [2024-06-27 16:43:22,724 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [659943920] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 16:43:22,724 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1532840269] [2024-06-27 16:43:22,724 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-06-27 16:43:22,724 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:43:22,724 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 16:43:22,725 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-27 16:43:22,767 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-06-27 16:43:22,791 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-06-27 16:43:22,792 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 16:43:22,792 INFO L262 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 12 conjunts are in the unsatisfiable core [2024-06-27 16:43:22,793 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 16:43:22,849 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 16:43:22,849 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 16:43:22,912 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 16:43:22,912 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1532840269] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 16:43:22,912 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 16:43:22,912 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 7] total 15 [2024-06-27 16:43:22,912 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2062208097] [2024-06-27 16:43:22,912 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 16:43:22,913 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-06-27 16:43:22,913 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:43:22,913 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-06-27 16:43:22,913 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2024-06-27 16:43:22,914 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 25 [2024-06-27 16:43:22,914 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 359 places, 964 transitions, 24583 flow. Second operand has 15 states, 15 states have (on average 6.2) internal successors, (93), 15 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:43:22,914 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:43:22,914 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 25 [2024-06-27 16:43:22,915 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:43:27,275 INFO L124 PetriNetUnfolderBase]: 8107/12309 cut-off events. [2024-06-27 16:43:27,275 INFO L125 PetriNetUnfolderBase]: For 453759/453759 co-relation queries the response was YES. [2024-06-27 16:43:27,394 INFO L83 FinitePrefix]: Finished finitePrefix Result has 132189 conditions, 12309 events. 8107/12309 cut-off events. For 453759/453759 co-relation queries the response was YES. Maximal size of possible extension queue 859. Compared 77252 event pairs, 961 based on Foata normal form. 63/12372 useless extension candidates. Maximal degree in co-relation 131725. Up to 4692 conditions per place. [2024-06-27 16:43:27,456 INFO L140 encePairwiseOnDemand]: 16/25 looper letters, 674 selfloop transitions, 854 changer transitions 1/1530 dead transitions. [2024-06-27 16:43:27,457 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 382 places, 1530 transitions, 40052 flow [2024-06-27 16:43:27,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2024-06-27 16:43:27,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2024-06-27 16:43:27,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 297 transitions. [2024-06-27 16:43:27,459 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.495 [2024-06-27 16:43:27,459 INFO L175 Difference]: Start difference. First operand has 359 places, 964 transitions, 24583 flow. Second operand 24 states and 297 transitions. [2024-06-27 16:43:27,459 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 382 places, 1530 transitions, 40052 flow [2024-06-27 16:43:31,673 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 376 places, 1530 transitions, 39116 flow, removed 263 selfloop flow, removed 6 redundant places. [2024-06-27 16:43:31,699 INFO L231 Difference]: Finished difference. Result has 391 places, 1277 transitions, 35089 flow [2024-06-27 16:43:31,699 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=25, PETRI_DIFFERENCE_MINUEND_FLOW=23751, PETRI_DIFFERENCE_MINUEND_PLACES=353, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=961, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=588, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=270, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=35089, PETRI_PLACES=391, PETRI_TRANSITIONS=1277} [2024-06-27 16:43:31,700 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 363 predicate places. [2024-06-27 16:43:31,700 INFO L495 AbstractCegarLoop]: Abstraction has has 391 places, 1277 transitions, 35089 flow [2024-06-27 16:43:31,700 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 6.2) internal successors, (93), 15 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:43:31,700 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:43:31,700 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 16:43:31,712 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2024-06-27 16:43:31,911 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:43:31,911 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-27 16:43:31,911 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:43:31,912 INFO L85 PathProgramCache]: Analyzing trace with hash 731739012, now seen corresponding path program 4 times [2024-06-27 16:43:31,912 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:43:31,912 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [66652842] [2024-06-27 16:43:31,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:43:31,912 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:43:31,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:43:31,986 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 16:43:31,986 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:43:31,986 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [66652842] [2024-06-27 16:43:31,986 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [66652842] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 16:43:31,987 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 16:43:31,987 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 16:43:31,987 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1660210200] [2024-06-27 16:43:31,987 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 16:43:31,987 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 16:43:31,987 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:43:31,988 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 16:43:31,988 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-27 16:43:31,988 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 25 [2024-06-27 16:43:31,988 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 391 places, 1277 transitions, 35089 flow. Second operand has 7 states, 7 states have (on average 6.571428571428571) internal successors, (46), 7 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:43:31,988 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:43:31,988 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 25 [2024-06-27 16:43:31,988 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand