./Ultimate.py --spec /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/properties/unreach-call.prp --file /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-figure3.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 84cfde4a Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-figure3.wvr.c -s /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate-clean/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 a479da07a0fc6d1ad250c3f67241d6294523a3c8fee4f6d465a7a5bdc9204f86 --- Real Ultimate output --- This is Ultimate 0.2.5-dev-84cfde4 [2024-10-11 14:31:47,738 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-10-11 14:31:47,822 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-10-11 14:31:47,827 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-10-11 14:31:47,827 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-10-11 14:31:47,864 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-10-11 14:31:47,865 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-10-11 14:31:47,865 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-10-11 14:31:47,866 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-10-11 14:31:47,868 INFO L153 SettingsManager]: * Use memory slicer=true [2024-10-11 14:31:47,868 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-10-11 14:31:47,869 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-10-11 14:31:47,869 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-10-11 14:31:47,870 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-10-11 14:31:47,870 INFO L153 SettingsManager]: * Use SBE=true [2024-10-11 14:31:47,870 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-10-11 14:31:47,871 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-10-11 14:31:47,871 INFO L153 SettingsManager]: * sizeof long=4 [2024-10-11 14:31:47,871 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-10-11 14:31:47,871 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-10-11 14:31:47,872 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-10-11 14:31:47,877 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-10-11 14:31:47,877 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-10-11 14:31:47,877 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-10-11 14:31:47,877 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-10-11 14:31:47,878 INFO L153 SettingsManager]: * sizeof long double=12 [2024-10-11 14:31:47,878 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-10-11 14:31:47,878 INFO L153 SettingsManager]: * Use constant arrays=true [2024-10-11 14:31:47,878 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-10-11 14:31:47,879 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-10-11 14:31:47,879 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-10-11 14:31:47,879 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-10-11 14:31:47,879 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-11 14:31:47,880 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-10-11 14:31:47,880 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-10-11 14:31:47,880 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-10-11 14:31:47,881 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-10-11 14:31:47,881 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-10-11 14:31:47,881 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-10-11 14:31:47,881 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-10-11 14:31:47,881 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-10-11 14:31:47,882 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-10-11 14:31:47,882 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-clean/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a479da07a0fc6d1ad250c3f67241d6294523a3c8fee4f6d465a7a5bdc9204f86 [2024-10-11 14:31:48,107 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-10-11 14:31:48,131 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-10-11 14:31:48,134 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-10-11 14:31:48,136 INFO L270 PluginConnector]: Initializing CDTParser... [2024-10-11 14:31:48,137 INFO L274 PluginConnector]: CDTParser initialized [2024-10-11 14:31:48,138 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-figure3.wvr.c [2024-10-11 14:31:49,485 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-10-11 14:31:49,680 INFO L384 CDTParser]: Found 1 translation units. [2024-10-11 14:31:49,680 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-figure3.wvr.c [2024-10-11 14:31:49,687 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/data/93269dae4/91d11c36b5d54f6d97c429df2db03084/FLAGc5ee18756 [2024-10-11 14:31:49,700 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/data/93269dae4/91d11c36b5d54f6d97c429df2db03084 [2024-10-11 14:31:49,702 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-10-11 14:31:49,703 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-10-11 14:31:49,705 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-10-11 14:31:49,705 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-10-11 14:31:49,710 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-10-11 14:31:49,710 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.10 02:31:49" (1/1) ... [2024-10-11 14:31:49,711 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@40ad92e1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:31:49, skipping insertion in model container [2024-10-11 14:31:49,712 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.10 02:31:49" (1/1) ... [2024-10-11 14:31:49,732 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-10-11 14:31:49,907 WARN L248 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-figure3.wvr.c[2147,2160] [2024-10-11 14:31:49,912 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-11 14:31:49,922 INFO L200 MainTranslator]: Completed pre-run [2024-10-11 14:31:49,938 WARN L248 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-figure3.wvr.c[2147,2160] [2024-10-11 14:31:49,939 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-11 14:31:49,955 INFO L204 MainTranslator]: Completed translation [2024-10-11 14:31:49,956 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:31:49 WrapperNode [2024-10-11 14:31:49,956 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-10-11 14:31:49,957 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-10-11 14:31:49,957 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-10-11 14:31:49,957 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-10-11 14:31:49,964 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:31:49" (1/1) ... [2024-10-11 14:31:49,970 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:31:49" (1/1) ... [2024-10-11 14:31:49,989 INFO L138 Inliner]: procedures = 20, calls = 15, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 63 [2024-10-11 14:31:49,989 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-10-11 14:31:49,990 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-10-11 14:31:49,990 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-10-11 14:31:49,990 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-10-11 14:31:50,001 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:31:49" (1/1) ... [2024-10-11 14:31:50,001 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:31:49" (1/1) ... [2024-10-11 14:31:50,003 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:31:49" (1/1) ... [2024-10-11 14:31:50,019 INFO L175 MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0]. [2024-10-11 14:31:50,020 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:31:49" (1/1) ... [2024-10-11 14:31:50,020 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:31:49" (1/1) ... [2024-10-11 14:31:50,024 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:31:49" (1/1) ... [2024-10-11 14:31:50,027 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:31:49" (1/1) ... [2024-10-11 14:31:50,027 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:31:49" (1/1) ... [2024-10-11 14:31:50,028 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:31:49" (1/1) ... [2024-10-11 14:31:50,030 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-10-11 14:31:50,031 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-10-11 14:31:50,031 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-10-11 14:31:50,031 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-10-11 14:31:50,032 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:31:49" (1/1) ... [2024-10-11 14:31:50,038 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-11 14:31:50,049 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 14:31:50,065 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-10-11 14:31:50,069 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-10-11 14:31:50,120 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-10-11 14:31:50,121 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-10-11 14:31:50,121 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-10-11 14:31:50,121 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-10-11 14:31:50,121 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-10-11 14:31:50,122 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-10-11 14:31:50,122 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-10-11 14:31:50,122 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-10-11 14:31:50,124 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-10-11 14:31:50,124 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-10-11 14:31:50,126 WARN L207 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2024-10-11 14:31:50,231 INFO L238 CfgBuilder]: Building ICFG [2024-10-11 14:31:50,232 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-10-11 14:31:50,366 INFO L283 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-10-11 14:31:50,366 INFO L287 CfgBuilder]: Performing block encoding [2024-10-11 14:31:50,641 INFO L309 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-10-11 14:31:50,641 INFO L314 CfgBuilder]: Removed 2 assume(true) statements. [2024-10-11 14:31:50,642 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.10 02:31:50 BoogieIcfgContainer [2024-10-11 14:31:50,642 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-10-11 14:31:50,644 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-10-11 14:31:50,644 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-10-11 14:31:50,648 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-10-11 14:31:50,648 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 11.10 02:31:49" (1/3) ... [2024-10-11 14:31:50,650 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@56732967 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.10 02:31:50, skipping insertion in model container [2024-10-11 14:31:50,650 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:31:49" (2/3) ... [2024-10-11 14:31:50,650 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@56732967 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.10 02:31:50, skipping insertion in model container [2024-10-11 14:31:50,651 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.10 02:31:50" (3/3) ... [2024-10-11 14:31:50,652 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-figure3.wvr.c [2024-10-11 14:31:50,667 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-10-11 14:31:50,667 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-10-11 14:31:50,667 INFO L484 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-10-11 14:31:50,706 INFO L143 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2024-10-11 14:31:50,736 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 27 places, 22 transitions, 58 flow [2024-10-11 14:31:50,756 INFO L124 PetriNetUnfolderBase]: 2/20 cut-off events. [2024-10-11 14:31:50,756 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-10-11 14:31:50,759 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29 conditions, 20 events. 2/20 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 21 event pairs, 0 based on Foata normal form. 0/17 useless extension candidates. Maximal degree in co-relation 15. Up to 2 conditions per place. [2024-10-11 14:31:50,759 INFO L82 GeneralOperation]: Start removeDead. Operand has 27 places, 22 transitions, 58 flow [2024-10-11 14:31:50,764 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 24 places, 19 transitions, 50 flow [2024-10-11 14:31:50,776 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-10-11 14:31:50,782 INFO L333 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopHeads, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@451c718f, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-10-11 14:31:50,783 INFO L334 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2024-10-11 14:31:50,794 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-10-11 14:31:50,795 INFO L124 PetriNetUnfolderBase]: 2/18 cut-off events. [2024-10-11 14:31:50,795 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-10-11 14:31:50,795 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 14:31:50,796 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 14:31:50,796 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-11 14:31:50,801 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 14:31:50,801 INFO L85 PathProgramCache]: Analyzing trace with hash -1596738301, now seen corresponding path program 1 times [2024-10-11 14:31:50,809 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 14:31:50,810 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1453724783] [2024-10-11 14:31:50,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 14:31:50,810 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 14:31:50,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 14:31:51,124 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 14:31:51,126 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 14:31:51,127 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1453724783] [2024-10-11 14:31:51,127 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1453724783] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-11 14:31:51,128 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-11 14:31:51,128 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-11 14:31:51,130 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1990834818] [2024-10-11 14:31:51,130 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-11 14:31:51,140 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-11 14:31:51,146 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 14:31:51,170 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-11 14:31:51,171 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-11 14:31:51,176 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 22 [2024-10-11 14:31:51,179 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 24 places, 19 transitions, 50 flow. Second operand has 3 states, 3 states have (on average 9.0) internal successors, (27), 3 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 14:31:51,179 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 14:31:51,179 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 22 [2024-10-11 14:31:51,180 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 14:31:51,274 INFO L124 PetriNetUnfolderBase]: 76/157 cut-off events. [2024-10-11 14:31:51,274 INFO L125 PetriNetUnfolderBase]: For 19/19 co-relation queries the response was YES. [2024-10-11 14:31:51,276 INFO L83 FinitePrefix]: Finished finitePrefix Result has 325 conditions, 157 events. 76/157 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 509 event pairs, 27 based on Foata normal form. 8/164 useless extension candidates. Maximal degree in co-relation 273. Up to 91 conditions per place. [2024-10-11 14:31:51,279 INFO L140 encePairwiseOnDemand]: 18/22 looper letters, 20 selfloop transitions, 2 changer transitions 3/28 dead transitions. [2024-10-11 14:31:51,279 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 26 places, 28 transitions, 127 flow [2024-10-11 14:31:51,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-11 14:31:51,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-10-11 14:31:51,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 42 transitions. [2024-10-11 14:31:51,292 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6363636363636364 [2024-10-11 14:31:51,294 INFO L175 Difference]: Start difference. First operand has 24 places, 19 transitions, 50 flow. Second operand 3 states and 42 transitions. [2024-10-11 14:31:51,294 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 26 places, 28 transitions, 127 flow [2024-10-11 14:31:51,296 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 22 places, 28 transitions, 113 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-10-11 14:31:51,298 INFO L231 Difference]: Finished difference. Result has 23 places, 20 transitions, 56 flow [2024-10-11 14:31:51,300 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=42, PETRI_DIFFERENCE_MINUEND_PLACES=20, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=19, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=17, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=56, PETRI_PLACES=23, PETRI_TRANSITIONS=20} [2024-10-11 14:31:51,306 INFO L277 CegarLoopForPetriNet]: 24 programPoint places, -1 predicate places. [2024-10-11 14:31:51,307 INFO L471 AbstractCegarLoop]: Abstraction has has 23 places, 20 transitions, 56 flow [2024-10-11 14:31:51,307 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 9.0) internal successors, (27), 3 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 14:31:51,307 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 14:31:51,308 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 14:31:51,309 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-10-11 14:31:51,309 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-11 14:31:51,310 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 14:31:51,310 INFO L85 PathProgramCache]: Analyzing trace with hash 832542053, now seen corresponding path program 1 times [2024-10-11 14:31:51,310 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 14:31:51,311 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1659732330] [2024-10-11 14:31:51,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 14:31:51,311 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 14:31:51,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 14:31:51,551 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 14:31:51,551 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 14:31:51,552 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1659732330] [2024-10-11 14:31:51,552 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1659732330] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-11 14:31:51,552 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-11 14:31:51,553 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-10-11 14:31:51,553 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [794402847] [2024-10-11 14:31:51,553 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-11 14:31:51,555 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-10-11 14:31:51,556 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 14:31:51,556 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-10-11 14:31:51,556 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2024-10-11 14:31:51,559 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 22 [2024-10-11 14:31:51,559 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 23 places, 20 transitions, 56 flow. Second operand has 5 states, 5 states have (on average 6.8) internal successors, (34), 5 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 14:31:51,559 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 14:31:51,559 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 22 [2024-10-11 14:31:51,559 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 14:31:51,754 INFO L124 PetriNetUnfolderBase]: 138/266 cut-off events. [2024-10-11 14:31:51,754 INFO L125 PetriNetUnfolderBase]: For 12/12 co-relation queries the response was YES. [2024-10-11 14:31:51,756 INFO L83 FinitePrefix]: Finished finitePrefix Result has 568 conditions, 266 events. 138/266 cut-off events. For 12/12 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 1056 event pairs, 60 based on Foata normal form. 0/220 useless extension candidates. Maximal degree in co-relation 227. Up to 172 conditions per place. [2024-10-11 14:31:51,758 INFO L140 encePairwiseOnDemand]: 15/22 looper letters, 29 selfloop transitions, 7 changer transitions 3/42 dead transitions. [2024-10-11 14:31:51,758 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 27 places, 42 transitions, 183 flow [2024-10-11 14:31:51,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-10-11 14:31:51,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-10-11 14:31:51,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 60 transitions. [2024-10-11 14:31:51,761 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5454545454545454 [2024-10-11 14:31:51,761 INFO L175 Difference]: Start difference. First operand has 23 places, 20 transitions, 56 flow. Second operand 5 states and 60 transitions. [2024-10-11 14:31:51,761 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 27 places, 42 transitions, 183 flow [2024-10-11 14:31:51,762 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 26 places, 42 transitions, 181 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-10-11 14:31:51,764 INFO L231 Difference]: Finished difference. Result has 29 places, 26 transitions, 106 flow [2024-10-11 14:31:51,765 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=54, PETRI_DIFFERENCE_MINUEND_PLACES=22, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=20, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=15, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=106, PETRI_PLACES=29, PETRI_TRANSITIONS=26} [2024-10-11 14:31:51,765 INFO L277 CegarLoopForPetriNet]: 24 programPoint places, 5 predicate places. [2024-10-11 14:31:51,766 INFO L471 AbstractCegarLoop]: Abstraction has has 29 places, 26 transitions, 106 flow [2024-10-11 14:31:51,766 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.8) internal successors, (34), 5 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 14:31:51,766 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 14:31:51,766 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 14:31:51,766 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-10-11 14:31:51,767 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-11 14:31:51,769 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 14:31:51,769 INFO L85 PathProgramCache]: Analyzing trace with hash -558101359, now seen corresponding path program 2 times [2024-10-11 14:31:51,770 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 14:31:51,770 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1514915163] [2024-10-11 14:31:51,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 14:31:51,771 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 14:31:51,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 14:31:51,967 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 14:31:51,967 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 14:31:51,967 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1514915163] [2024-10-11 14:31:51,968 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1514915163] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-11 14:31:51,968 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-11 14:31:51,968 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-10-11 14:31:51,968 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1063329248] [2024-10-11 14:31:51,969 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-11 14:31:51,969 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-10-11 14:31:51,970 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 14:31:51,971 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-10-11 14:31:51,971 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-10-11 14:31:51,976 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 22 [2024-10-11 14:31:51,977 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 29 places, 26 transitions, 106 flow. Second operand has 6 states, 6 states have (on average 6.333333333333333) internal successors, (38), 6 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 14:31:51,977 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 14:31:51,977 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 22 [2024-10-11 14:31:51,977 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 14:31:52,176 INFO L124 PetriNetUnfolderBase]: 158/300 cut-off events. [2024-10-11 14:31:52,177 INFO L125 PetriNetUnfolderBase]: For 162/162 co-relation queries the response was YES. [2024-10-11 14:31:52,180 INFO L83 FinitePrefix]: Finished finitePrefix Result has 867 conditions, 300 events. 158/300 cut-off events. For 162/162 co-relation queries the response was YES. Maximal size of possible extension queue 27. Compared 1220 event pairs, 4 based on Foata normal form. 9/307 useless extension candidates. Maximal degree in co-relation 387. Up to 124 conditions per place. [2024-10-11 14:31:52,183 INFO L140 encePairwiseOnDemand]: 15/22 looper letters, 45 selfloop transitions, 13 changer transitions 1/62 dead transitions. [2024-10-11 14:31:52,184 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 35 places, 62 transitions, 350 flow [2024-10-11 14:31:52,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-10-11 14:31:52,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-10-11 14:31:52,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 84 transitions. [2024-10-11 14:31:52,186 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5454545454545454 [2024-10-11 14:31:52,188 INFO L175 Difference]: Start difference. First operand has 29 places, 26 transitions, 106 flow. Second operand 7 states and 84 transitions. [2024-10-11 14:31:52,188 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 35 places, 62 transitions, 350 flow [2024-10-11 14:31:52,190 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 35 places, 62 transitions, 348 flow, removed 1 selfloop flow, removed 0 redundant places. [2024-10-11 14:31:52,192 INFO L231 Difference]: Finished difference. Result has 41 places, 35 transitions, 212 flow [2024-10-11 14:31:52,194 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=104, PETRI_DIFFERENCE_MINUEND_PLACES=29, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=26, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=16, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=212, PETRI_PLACES=41, PETRI_TRANSITIONS=35} [2024-10-11 14:31:52,195 INFO L277 CegarLoopForPetriNet]: 24 programPoint places, 17 predicate places. [2024-10-11 14:31:52,195 INFO L471 AbstractCegarLoop]: Abstraction has has 41 places, 35 transitions, 212 flow [2024-10-11 14:31:52,196 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 6.333333333333333) internal successors, (38), 6 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 14:31:52,196 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 14:31:52,197 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 14:31:52,197 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-10-11 14:31:52,197 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-11 14:31:52,198 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 14:31:52,199 INFO L85 PathProgramCache]: Analyzing trace with hash 579789325, now seen corresponding path program 3 times [2024-10-11 14:31:52,199 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 14:31:52,199 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [362798715] [2024-10-11 14:31:52,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 14:31:52,200 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 14:31:52,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 14:31:52,322 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 14:31:52,322 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 14:31:52,322 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [362798715] [2024-10-11 14:31:52,322 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [362798715] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-11 14:31:52,322 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-11 14:31:52,322 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-10-11 14:31:52,323 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [588657946] [2024-10-11 14:31:52,323 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-11 14:31:52,323 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-10-11 14:31:52,323 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 14:31:52,323 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-10-11 14:31:52,324 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-10-11 14:31:52,326 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 22 [2024-10-11 14:31:52,326 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 35 transitions, 212 flow. Second operand has 5 states, 5 states have (on average 6.8) internal successors, (34), 5 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 14:31:52,326 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 14:31:52,327 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 22 [2024-10-11 14:31:52,328 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 14:31:52,453 INFO L124 PetriNetUnfolderBase]: 207/392 cut-off events. [2024-10-11 14:31:52,453 INFO L125 PetriNetUnfolderBase]: For 715/715 co-relation queries the response was YES. [2024-10-11 14:31:52,455 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1424 conditions, 392 events. 207/392 cut-off events. For 715/715 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 1557 event pairs, 65 based on Foata normal form. 6/393 useless extension candidates. Maximal degree in co-relation 947. Up to 168 conditions per place. [2024-10-11 14:31:52,457 INFO L140 encePairwiseOnDemand]: 17/22 looper letters, 41 selfloop transitions, 10 changer transitions 2/56 dead transitions. [2024-10-11 14:31:52,457 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 56 transitions, 431 flow [2024-10-11 14:31:52,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-10-11 14:31:52,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-10-11 14:31:52,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 57 transitions. [2024-10-11 14:31:52,460 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5181818181818182 [2024-10-11 14:31:52,460 INFO L175 Difference]: Start difference. First operand has 41 places, 35 transitions, 212 flow. Second operand 5 states and 57 transitions. [2024-10-11 14:31:52,460 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 56 transitions, 431 flow [2024-10-11 14:31:52,465 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 56 transitions, 431 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-10-11 14:31:52,466 INFO L231 Difference]: Finished difference. Result has 48 places, 37 transitions, 268 flow [2024-10-11 14:31:52,467 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=212, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=268, PETRI_PLACES=48, PETRI_TRANSITIONS=37} [2024-10-11 14:31:52,468 INFO L277 CegarLoopForPetriNet]: 24 programPoint places, 24 predicate places. [2024-10-11 14:31:52,468 INFO L471 AbstractCegarLoop]: Abstraction has has 48 places, 37 transitions, 268 flow [2024-10-11 14:31:52,469 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.8) internal successors, (34), 5 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 14:31:52,469 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 14:31:52,469 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 14:31:52,469 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-10-11 14:31:52,470 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-11 14:31:52,472 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 14:31:52,472 INFO L85 PathProgramCache]: Analyzing trace with hash -1175860589, now seen corresponding path program 4 times [2024-10-11 14:31:52,472 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 14:31:52,472 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1846929636] [2024-10-11 14:31:52,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 14:31:52,472 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 14:31:52,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 14:31:52,616 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 14:31:52,617 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 14:31:52,617 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1846929636] [2024-10-11 14:31:52,617 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1846929636] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 14:31:52,618 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1693934575] [2024-10-11 14:31:52,618 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-10-11 14:31:52,618 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 14:31:52,619 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 14:31:52,621 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 14:31:52,623 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-10-11 14:31:52,685 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-10-11 14:31:52,685 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-11 14:31:52,687 INFO L255 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-10-11 14:31:52,691 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 14:31:52,801 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 14:31:52,802 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 14:31:52,866 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 14:31:52,866 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1693934575] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-11 14:31:52,866 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-11 14:31:52,867 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 4] total 8 [2024-10-11 14:31:52,867 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1688168624] [2024-10-11 14:31:52,867 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-11 14:31:52,867 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-10-11 14:31:52,867 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 14:31:52,868 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-10-11 14:31:52,872 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2024-10-11 14:31:52,880 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 22 [2024-10-11 14:31:52,880 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 37 transitions, 268 flow. Second operand has 8 states, 8 states have (on average 7.25) internal successors, (58), 8 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 14:31:52,880 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 14:31:52,880 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 22 [2024-10-11 14:31:52,880 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 14:31:53,127 INFO L124 PetriNetUnfolderBase]: 302/564 cut-off events. [2024-10-11 14:31:53,128 INFO L125 PetriNetUnfolderBase]: For 1403/1403 co-relation queries the response was YES. [2024-10-11 14:31:53,130 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2202 conditions, 564 events. 302/564 cut-off events. For 1403/1403 co-relation queries the response was YES. Maximal size of possible extension queue 50. Compared 2598 event pairs, 33 based on Foata normal form. 9/565 useless extension candidates. Maximal degree in co-relation 1549. Up to 155 conditions per place. [2024-10-11 14:31:53,133 INFO L140 encePairwiseOnDemand]: 14/22 looper letters, 48 selfloop transitions, 35 changer transitions 2/88 dead transitions. [2024-10-11 14:31:53,133 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 88 transitions, 739 flow [2024-10-11 14:31:53,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-10-11 14:31:53,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-10-11 14:31:53,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 114 transitions. [2024-10-11 14:31:53,135 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5181818181818182 [2024-10-11 14:31:53,137 INFO L175 Difference]: Start difference. First operand has 48 places, 37 transitions, 268 flow. Second operand 10 states and 114 transitions. [2024-10-11 14:31:53,137 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 88 transitions, 739 flow [2024-10-11 14:31:53,143 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 88 transitions, 715 flow, removed 6 selfloop flow, removed 2 redundant places. [2024-10-11 14:31:53,146 INFO L231 Difference]: Finished difference. Result has 60 places, 54 transitions, 520 flow [2024-10-11 14:31:53,147 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=245, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=15, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=520, PETRI_PLACES=60, PETRI_TRANSITIONS=54} [2024-10-11 14:31:53,147 INFO L277 CegarLoopForPetriNet]: 24 programPoint places, 36 predicate places. [2024-10-11 14:31:53,149 INFO L471 AbstractCegarLoop]: Abstraction has has 60 places, 54 transitions, 520 flow [2024-10-11 14:31:53,149 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 7.25) internal successors, (58), 8 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 14:31:53,149 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 14:31:53,149 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 14:31:53,167 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-10-11 14:31:53,350 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 14:31:53,351 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-11 14:31:53,351 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 14:31:53,351 INFO L85 PathProgramCache]: Analyzing trace with hash 2014856815, now seen corresponding path program 5 times [2024-10-11 14:31:53,351 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 14:31:53,351 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2124258397] [2024-10-11 14:31:53,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 14:31:53,351 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 14:31:53,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 14:31:53,438 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 14:31:53,438 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 14:31:53,438 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2124258397] [2024-10-11 14:31:53,439 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2124258397] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-11 14:31:53,439 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-11 14:31:53,439 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-10-11 14:31:53,439 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [445561751] [2024-10-11 14:31:53,439 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-11 14:31:53,439 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-10-11 14:31:53,439 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 14:31:53,440 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-10-11 14:31:53,440 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-10-11 14:31:53,443 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 22 [2024-10-11 14:31:53,443 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 54 transitions, 520 flow. Second operand has 5 states, 5 states have (on average 6.8) internal successors, (34), 5 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 14:31:53,443 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 14:31:53,443 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 22 [2024-10-11 14:31:53,443 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 14:31:53,557 INFO L124 PetriNetUnfolderBase]: 304/565 cut-off events. [2024-10-11 14:31:53,557 INFO L125 PetriNetUnfolderBase]: For 2946/2946 co-relation queries the response was YES. [2024-10-11 14:31:53,574 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2698 conditions, 565 events. 304/565 cut-off events. For 2946/2946 co-relation queries the response was YES. Maximal size of possible extension queue 50. Compared 2521 event pairs, 89 based on Foata normal form. 2/562 useless extension candidates. Maximal degree in co-relation 2023. Up to 294 conditions per place. [2024-10-11 14:31:53,578 INFO L140 encePairwiseOnDemand]: 15/22 looper letters, 47 selfloop transitions, 20 changer transitions 1/71 dead transitions. [2024-10-11 14:31:53,578 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 71 transitions, 791 flow [2024-10-11 14:31:53,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-10-11 14:31:53,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-10-11 14:31:53,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 58 transitions. [2024-10-11 14:31:53,579 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5272727272727272 [2024-10-11 14:31:53,579 INFO L175 Difference]: Start difference. First operand has 60 places, 54 transitions, 520 flow. Second operand 5 states and 58 transitions. [2024-10-11 14:31:53,580 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 71 transitions, 791 flow [2024-10-11 14:31:53,586 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 71 transitions, 711 flow, removed 31 selfloop flow, removed 3 redundant places. [2024-10-11 14:31:53,587 INFO L231 Difference]: Finished difference. Result has 62 places, 58 transitions, 553 flow [2024-10-11 14:31:53,587 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=454, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=553, PETRI_PLACES=62, PETRI_TRANSITIONS=58} [2024-10-11 14:31:53,588 INFO L277 CegarLoopForPetriNet]: 24 programPoint places, 38 predicate places. [2024-10-11 14:31:53,588 INFO L471 AbstractCegarLoop]: Abstraction has has 62 places, 58 transitions, 553 flow [2024-10-11 14:31:53,588 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.8) internal successors, (34), 5 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 14:31:53,589 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 14:31:53,589 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 14:31:53,589 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-10-11 14:31:53,589 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-11 14:31:53,589 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 14:31:53,590 INFO L85 PathProgramCache]: Analyzing trace with hash 311973905, now seen corresponding path program 6 times [2024-10-11 14:31:53,590 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 14:31:53,590 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1901617693] [2024-10-11 14:31:53,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 14:31:53,590 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 14:31:53,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 14:31:53,679 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 14:31:53,679 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 14:31:53,679 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1901617693] [2024-10-11 14:31:53,679 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1901617693] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-11 14:31:53,679 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-11 14:31:53,680 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-10-11 14:31:53,680 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [942596259] [2024-10-11 14:31:53,680 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-11 14:31:53,680 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-10-11 14:31:53,680 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 14:31:53,681 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-10-11 14:31:53,681 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2024-10-11 14:31:53,686 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 22 [2024-10-11 14:31:53,687 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 58 transitions, 553 flow. Second operand has 6 states, 6 states have (on average 6.333333333333333) internal successors, (38), 6 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 14:31:53,687 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 14:31:53,687 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 22 [2024-10-11 14:31:53,687 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 14:31:53,822 INFO L124 PetriNetUnfolderBase]: 302/558 cut-off events. [2024-10-11 14:31:53,822 INFO L125 PetriNetUnfolderBase]: For 2921/2921 co-relation queries the response was YES. [2024-10-11 14:31:53,826 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2629 conditions, 558 events. 302/558 cut-off events. For 2921/2921 co-relation queries the response was YES. Maximal size of possible extension queue 48. Compared 2423 event pairs, 86 based on Foata normal form. 7/560 useless extension candidates. Maximal degree in co-relation 2057. Up to 275 conditions per place. [2024-10-11 14:31:53,830 INFO L140 encePairwiseOnDemand]: 15/22 looper letters, 45 selfloop transitions, 26 changer transitions 0/74 dead transitions. [2024-10-11 14:31:53,830 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 74 transitions, 784 flow [2024-10-11 14:31:53,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-10-11 14:31:53,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-10-11 14:31:53,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 67 transitions. [2024-10-11 14:31:53,831 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5075757575757576 [2024-10-11 14:31:53,831 INFO L175 Difference]: Start difference. First operand has 62 places, 58 transitions, 553 flow. Second operand 6 states and 67 transitions. [2024-10-11 14:31:53,831 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 74 transitions, 784 flow [2024-10-11 14:31:53,838 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 74 transitions, 738 flow, removed 9 selfloop flow, removed 4 redundant places. [2024-10-11 14:31:53,840 INFO L231 Difference]: Finished difference. Result has 63 places, 59 transitions, 583 flow [2024-10-11 14:31:53,840 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=497, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=583, PETRI_PLACES=63, PETRI_TRANSITIONS=59} [2024-10-11 14:31:53,841 INFO L277 CegarLoopForPetriNet]: 24 programPoint places, 39 predicate places. [2024-10-11 14:31:53,841 INFO L471 AbstractCegarLoop]: Abstraction has has 63 places, 59 transitions, 583 flow [2024-10-11 14:31:53,841 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 6.333333333333333) internal successors, (38), 6 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 14:31:53,841 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 14:31:53,842 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 14:31:53,842 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-10-11 14:31:53,842 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-11 14:31:53,842 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 14:31:53,842 INFO L85 PathProgramCache]: Analyzing trace with hash 1400090670, now seen corresponding path program 1 times [2024-10-11 14:31:53,843 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 14:31:53,843 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [888865715] [2024-10-11 14:31:53,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 14:31:53,843 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 14:31:53,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 14:31:53,942 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 14:31:53,942 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 14:31:53,942 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [888865715] [2024-10-11 14:31:53,942 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [888865715] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 14:31:53,942 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1635337979] [2024-10-11 14:31:53,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 14:31:53,942 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 14:31:53,942 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 14:31:53,945 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 14:31:53,947 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-10-11 14:31:54,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 14:31:54,004 INFO L255 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-10-11 14:31:54,005 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 14:31:54,039 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-11 14:31:54,040 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 14:31:54,100 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-11 14:31:54,101 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1635337979] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-11 14:31:54,101 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-11 14:31:54,101 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3, 3] total 6 [2024-10-11 14:31:54,101 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [595500150] [2024-10-11 14:31:54,101 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-11 14:31:54,102 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-10-11 14:31:54,102 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 14:31:54,102 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-10-11 14:31:54,102 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-10-11 14:31:54,106 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 22 [2024-10-11 14:31:54,106 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 59 transitions, 583 flow. Second operand has 7 states, 7 states have (on average 10.714285714285714) internal successors, (75), 7 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 14:31:54,106 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 14:31:54,106 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 22 [2024-10-11 14:31:54,107 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 14:31:54,272 INFO L124 PetriNetUnfolderBase]: 460/908 cut-off events. [2024-10-11 14:31:54,273 INFO L125 PetriNetUnfolderBase]: For 4604/4649 co-relation queries the response was YES. [2024-10-11 14:31:54,277 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4151 conditions, 908 events. 460/908 cut-off events. For 4604/4649 co-relation queries the response was YES. Maximal size of possible extension queue 67. Compared 4677 event pairs, 76 based on Foata normal form. 18/921 useless extension candidates. Maximal degree in co-relation 2392. Up to 362 conditions per place. [2024-10-11 14:31:54,282 INFO L140 encePairwiseOnDemand]: 18/22 looper letters, 72 selfloop transitions, 5 changer transitions 6/100 dead transitions. [2024-10-11 14:31:54,282 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 100 transitions, 1092 flow [2024-10-11 14:31:54,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-11 14:31:54,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-10-11 14:31:54,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 62 transitions. [2024-10-11 14:31:54,283 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.7045454545454546 [2024-10-11 14:31:54,283 INFO L175 Difference]: Start difference. First operand has 63 places, 59 transitions, 583 flow. Second operand 4 states and 62 transitions. [2024-10-11 14:31:54,283 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 100 transitions, 1092 flow [2024-10-11 14:31:54,291 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 100 transitions, 1031 flow, removed 1 selfloop flow, removed 3 redundant places. [2024-10-11 14:31:54,292 INFO L231 Difference]: Finished difference. Result has 65 places, 61 transitions, 579 flow [2024-10-11 14:31:54,293 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=541, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=579, PETRI_PLACES=65, PETRI_TRANSITIONS=61} [2024-10-11 14:31:54,294 INFO L277 CegarLoopForPetriNet]: 24 programPoint places, 41 predicate places. [2024-10-11 14:31:54,294 INFO L471 AbstractCegarLoop]: Abstraction has has 65 places, 61 transitions, 579 flow [2024-10-11 14:31:54,294 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.714285714285714) internal successors, (75), 7 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 14:31:54,294 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 14:31:54,294 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 14:31:54,312 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-10-11 14:31:54,494 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,3 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 14:31:54,495 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-11 14:31:54,496 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 14:31:54,496 INFO L85 PathProgramCache]: Analyzing trace with hash 617942674, now seen corresponding path program 2 times [2024-10-11 14:31:54,496 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 14:31:54,496 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1219995237] [2024-10-11 14:31:54,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 14:31:54,496 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 14:31:54,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 14:31:54,658 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 14:31:54,658 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 14:31:54,659 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1219995237] [2024-10-11 14:31:54,659 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1219995237] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 14:31:54,659 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [385235904] [2024-10-11 14:31:54,659 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-11 14:31:54,659 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 14:31:54,659 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 14:31:54,661 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 14:31:54,665 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-10-11 14:31:54,722 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-11 14:31:54,722 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-11 14:31:54,723 INFO L255 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-10-11 14:31:54,724 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 14:31:54,821 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 14:31:54,821 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 14:31:54,936 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 14:31:54,936 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [385235904] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-11 14:31:54,936 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-11 14:31:54,936 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 15 [2024-10-11 14:31:54,936 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [541761509] [2024-10-11 14:31:54,936 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-11 14:31:54,937 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-10-11 14:31:54,937 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 14:31:54,937 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-10-11 14:31:54,938 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=155, Unknown=0, NotChecked=0, Total=210 [2024-10-11 14:31:57,319 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.37s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-10-11 14:31:57,319 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 22 [2024-10-11 14:31:57,319 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 61 transitions, 579 flow. Second operand has 15 states, 15 states have (on average 6.666666666666667) internal successors, (100), 15 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 14:31:57,319 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 14:31:57,319 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 22 [2024-10-11 14:31:57,319 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 14:31:58,301 INFO L124 PetriNetUnfolderBase]: 1125/1921 cut-off events. [2024-10-11 14:31:58,301 INFO L125 PetriNetUnfolderBase]: For 9010/9036 co-relation queries the response was YES. [2024-10-11 14:31:58,308 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9391 conditions, 1921 events. 1125/1921 cut-off events. For 9010/9036 co-relation queries the response was YES. Maximal size of possible extension queue 100. Compared 9453 event pairs, 66 based on Foata normal form. 22/1941 useless extension candidates. Maximal degree in co-relation 5537. Up to 665 conditions per place. [2024-10-11 14:31:58,319 INFO L140 encePairwiseOnDemand]: 15/22 looper letters, 121 selfloop transitions, 87 changer transitions 7/220 dead transitions. [2024-10-11 14:31:58,320 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 220 transitions, 2345 flow [2024-10-11 14:31:58,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2024-10-11 14:31:58,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2024-10-11 14:31:58,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 231 transitions. [2024-10-11 14:31:58,322 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5 [2024-10-11 14:31:58,322 INFO L175 Difference]: Start difference. First operand has 65 places, 61 transitions, 579 flow. Second operand 21 states and 231 transitions. [2024-10-11 14:31:58,322 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 220 transitions, 2345 flow [2024-10-11 14:31:58,333 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 220 transitions, 2313 flow, removed 16 selfloop flow, removed 0 redundant places. [2024-10-11 14:31:58,337 INFO L231 Difference]: Finished difference. Result has 94 places, 126 transitions, 1475 flow [2024-10-11 14:31:58,337 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=575, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=1475, PETRI_PLACES=94, PETRI_TRANSITIONS=126} [2024-10-11 14:31:58,338 INFO L277 CegarLoopForPetriNet]: 24 programPoint places, 70 predicate places. [2024-10-11 14:31:58,339 INFO L471 AbstractCegarLoop]: Abstraction has has 94 places, 126 transitions, 1475 flow [2024-10-11 14:31:58,339 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 6.666666666666667) internal successors, (100), 15 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 14:31:58,339 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 14:31:58,339 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 14:31:58,356 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-10-11 14:31:58,543 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,4 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 14:31:58,544 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-11 14:31:58,544 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 14:31:58,544 INFO L85 PathProgramCache]: Analyzing trace with hash -754753068, now seen corresponding path program 3 times [2024-10-11 14:31:58,544 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 14:31:58,544 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1636628038] [2024-10-11 14:31:58,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 14:31:58,544 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 14:31:58,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 14:31:58,725 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 14:31:58,725 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 14:31:58,725 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1636628038] [2024-10-11 14:31:58,726 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1636628038] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 14:31:58,726 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1981707135] [2024-10-11 14:31:58,727 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-10-11 14:31:58,727 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 14:31:58,728 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 14:31:58,729 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 14:31:58,731 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-10-11 14:31:58,780 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-10-11 14:31:58,781 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-11 14:31:58,782 INFO L255 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-10-11 14:31:58,783 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 14:31:58,885 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 14:31:58,885 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 14:31:59,000 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 14:31:59,000 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1981707135] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-11 14:31:59,000 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-11 14:31:59,001 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 15 [2024-10-11 14:31:59,001 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [879593080] [2024-10-11 14:31:59,001 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-11 14:31:59,001 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-10-11 14:31:59,002 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 14:31:59,002 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-10-11 14:31:59,002 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2024-10-11 14:31:59,014 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 22 [2024-10-11 14:31:59,015 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 94 places, 126 transitions, 1475 flow. Second operand has 15 states, 15 states have (on average 6.4) internal successors, (96), 15 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 14:31:59,015 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 14:31:59,015 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 22 [2024-10-11 14:31:59,015 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 14:31:59,519 INFO L124 PetriNetUnfolderBase]: 1223/2101 cut-off events. [2024-10-11 14:31:59,520 INFO L125 PetriNetUnfolderBase]: For 22664/22700 co-relation queries the response was YES. [2024-10-11 14:31:59,529 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12519 conditions, 2101 events. 1223/2101 cut-off events. For 22664/22700 co-relation queries the response was YES. Maximal size of possible extension queue 118. Compared 10797 event pairs, 171 based on Foata normal form. 28/2121 useless extension candidates. Maximal degree in co-relation 8237. Up to 898 conditions per place. [2024-10-11 14:31:59,544 INFO L140 encePairwiseOnDemand]: 15/22 looper letters, 123 selfloop transitions, 75 changer transitions 11/214 dead transitions. [2024-10-11 14:31:59,544 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 108 places, 214 transitions, 2841 flow [2024-10-11 14:31:59,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-10-11 14:31:59,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2024-10-11 14:31:59,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 155 transitions. [2024-10-11 14:31:59,546 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4696969696969697 [2024-10-11 14:31:59,546 INFO L175 Difference]: Start difference. First operand has 94 places, 126 transitions, 1475 flow. Second operand 15 states and 155 transitions. [2024-10-11 14:31:59,546 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 108 places, 214 transitions, 2841 flow [2024-10-11 14:31:59,621 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 105 places, 214 transitions, 2499 flow, removed 154 selfloop flow, removed 3 redundant places. [2024-10-11 14:31:59,627 INFO L231 Difference]: Finished difference. Result has 115 places, 151 transitions, 1827 flow [2024-10-11 14:31:59,628 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=1225, PETRI_DIFFERENCE_MINUEND_PLACES=91, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=126, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=1827, PETRI_PLACES=115, PETRI_TRANSITIONS=151} [2024-10-11 14:31:59,629 INFO L277 CegarLoopForPetriNet]: 24 programPoint places, 91 predicate places. [2024-10-11 14:31:59,629 INFO L471 AbstractCegarLoop]: Abstraction has has 115 places, 151 transitions, 1827 flow [2024-10-11 14:31:59,630 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 6.4) internal successors, (96), 15 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 14:31:59,630 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 14:31:59,630 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 14:31:59,648 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-10-11 14:31:59,831 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2024-10-11 14:31:59,831 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-11 14:31:59,831 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 14:31:59,832 INFO L85 PathProgramCache]: Analyzing trace with hash 346791640, now seen corresponding path program 4 times [2024-10-11 14:31:59,832 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 14:31:59,832 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [600737643] [2024-10-11 14:31:59,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 14:31:59,832 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 14:31:59,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 14:31:59,993 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 14:31:59,994 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 14:31:59,994 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [600737643] [2024-10-11 14:31:59,995 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [600737643] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 14:31:59,995 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [523725129] [2024-10-11 14:31:59,995 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-10-11 14:31:59,995 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 14:31:59,996 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 14:31:59,997 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 14:31:59,999 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-10-11 14:32:00,049 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-10-11 14:32:00,049 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-11 14:32:00,050 INFO L255 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-10-11 14:32:00,051 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 14:32:00,141 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 14:32:00,141 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 14:32:00,233 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 14:32:00,233 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [523725129] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-11 14:32:00,233 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-11 14:32:00,233 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 12 [2024-10-11 14:32:00,235 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1679320447] [2024-10-11 14:32:00,235 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-11 14:32:00,235 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-10-11 14:32:00,236 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 14:32:00,236 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-10-11 14:32:00,236 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2024-10-11 14:32:00,240 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 22 [2024-10-11 14:32:00,241 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 115 places, 151 transitions, 1827 flow. Second operand has 12 states, 12 states have (on average 7.333333333333333) internal successors, (88), 12 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) [2024-10-11 14:32:00,241 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 14:32:00,241 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 22 [2024-10-11 14:32:00,241 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 14:32:01,166 INFO L124 PetriNetUnfolderBase]: 1662/2815 cut-off events. [2024-10-11 14:32:01,166 INFO L125 PetriNetUnfolderBase]: For 29389/29421 co-relation queries the response was YES. [2024-10-11 14:32:01,179 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16587 conditions, 2815 events. 1662/2815 cut-off events. For 29389/29421 co-relation queries the response was YES. Maximal size of possible extension queue 157. Compared 15024 event pairs, 37 based on Foata normal form. 70/2869 useless extension candidates. Maximal degree in co-relation 16142. Up to 899 conditions per place. [2024-10-11 14:32:01,198 INFO L140 encePairwiseOnDemand]: 14/22 looper letters, 127 selfloop transitions, 234 changer transitions 3/369 dead transitions. [2024-10-11 14:32:01,198 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 135 places, 369 transitions, 4845 flow [2024-10-11 14:32:01,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2024-10-11 14:32:01,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2024-10-11 14:32:01,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 228 transitions. [2024-10-11 14:32:01,200 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4505928853754941 [2024-10-11 14:32:01,200 INFO L175 Difference]: Start difference. First operand has 115 places, 151 transitions, 1827 flow. Second operand 23 states and 228 transitions. [2024-10-11 14:32:01,200 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 135 places, 369 transitions, 4845 flow [2024-10-11 14:32:01,320 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 132 places, 369 transitions, 4706 flow, removed 52 selfloop flow, removed 3 redundant places. [2024-10-11 14:32:01,329 INFO L231 Difference]: Finished difference. Result has 143 places, 286 transitions, 4253 flow [2024-10-11 14:32:01,329 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=1752, PETRI_DIFFERENCE_MINUEND_PLACES=110, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=151, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=104, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=4253, PETRI_PLACES=143, PETRI_TRANSITIONS=286} [2024-10-11 14:32:01,329 INFO L277 CegarLoopForPetriNet]: 24 programPoint places, 119 predicate places. [2024-10-11 14:32:01,330 INFO L471 AbstractCegarLoop]: Abstraction has has 143 places, 286 transitions, 4253 flow [2024-10-11 14:32:01,330 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 7.333333333333333) internal successors, (88), 12 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) [2024-10-11 14:32:01,330 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 14:32:01,330 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 14:32:01,343 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-10-11 14:32:01,530 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2024-10-11 14:32:01,531 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-11 14:32:01,531 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 14:32:01,531 INFO L85 PathProgramCache]: Analyzing trace with hash -1026085048, now seen corresponding path program 5 times [2024-10-11 14:32:01,532 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 14:32:01,532 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2007274248] [2024-10-11 14:32:01,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 14:32:01,532 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 14:32:01,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 14:32:01,694 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 14:32:01,694 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 14:32:01,694 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2007274248] [2024-10-11 14:32:01,695 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2007274248] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 14:32:01,695 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1374144437] [2024-10-11 14:32:01,695 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-10-11 14:32:01,695 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 14:32:01,695 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 14:32:01,697 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 14:32:01,698 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-10-11 14:32:01,743 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-11 14:32:01,744 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-11 14:32:01,744 INFO L255 TraceCheckSpWp]: Trace formula consists of 29 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-10-11 14:32:01,745 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 14:32:01,882 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 14:32:01,882 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 14:32:02,039 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 14:32:02,039 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1374144437] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-11 14:32:02,039 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-11 14:32:02,039 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 17 [2024-10-11 14:32:02,040 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [316010950] [2024-10-11 14:32:02,040 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-11 14:32:02,040 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-10-11 14:32:02,040 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 14:32:02,041 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-10-11 14:32:02,041 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=204, Unknown=0, NotChecked=0, Total=272 [2024-10-11 14:32:02,048 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 22 [2024-10-11 14:32:02,048 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 143 places, 286 transitions, 4253 flow. Second operand has 17 states, 17 states have (on average 6.176470588235294) internal successors, (105), 17 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 14:32:02,048 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 14:32:02,048 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 22 [2024-10-11 14:32:02,048 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 14:32:04,049 INFO L124 PetriNetUnfolderBase]: 2330/4008 cut-off events. [2024-10-11 14:32:04,049 INFO L125 PetriNetUnfolderBase]: For 49556/49602 co-relation queries the response was YES. [2024-10-11 14:32:04,067 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26609 conditions, 4008 events. 2330/4008 cut-off events. For 49556/49602 co-relation queries the response was YES. Maximal size of possible extension queue 207. Compared 23531 event pairs, 87 based on Foata normal form. 142/4130 useless extension candidates. Maximal degree in co-relation 26193. Up to 1248 conditions per place. [2024-10-11 14:32:04,090 INFO L140 encePairwiseOnDemand]: 14/22 looper letters, 156 selfloop transitions, 412 changer transitions 7/580 dead transitions. [2024-10-11 14:32:04,090 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 179 places, 580 transitions, 9060 flow [2024-10-11 14:32:04,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2024-10-11 14:32:04,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2024-10-11 14:32:04,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 342 transitions. [2024-10-11 14:32:04,094 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4201474201474201 [2024-10-11 14:32:04,094 INFO L175 Difference]: Start difference. First operand has 143 places, 286 transitions, 4253 flow. Second operand 37 states and 342 transitions. [2024-10-11 14:32:04,094 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 179 places, 580 transitions, 9060 flow [2024-10-11 14:32:04,308 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 176 places, 580 transitions, 7807 flow, removed 547 selfloop flow, removed 3 redundant places. [2024-10-11 14:32:04,318 INFO L231 Difference]: Finished difference. Result has 193 places, 457 transitions, 7343 flow [2024-10-11 14:32:04,318 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=3735, PETRI_DIFFERENCE_MINUEND_PLACES=140, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=284, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=238, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=37, PETRI_FLOW=7343, PETRI_PLACES=193, PETRI_TRANSITIONS=457} [2024-10-11 14:32:04,318 INFO L277 CegarLoopForPetriNet]: 24 programPoint places, 169 predicate places. [2024-10-11 14:32:04,319 INFO L471 AbstractCegarLoop]: Abstraction has has 193 places, 457 transitions, 7343 flow [2024-10-11 14:32:04,319 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 6.176470588235294) internal successors, (105), 17 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 14:32:04,319 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 14:32:04,319 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 14:32:04,336 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-10-11 14:32:04,519 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2024-10-11 14:32:04,520 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-11 14:32:04,520 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 14:32:04,521 INFO L85 PathProgramCache]: Analyzing trace with hash 1591637122, now seen corresponding path program 6 times [2024-10-11 14:32:04,521 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 14:32:04,521 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1425022285] [2024-10-11 14:32:04,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 14:32:04,521 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 14:32:04,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 14:32:04,649 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 14:32:04,649 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 14:32:04,649 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1425022285] [2024-10-11 14:32:04,649 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1425022285] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 14:32:04,650 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2093343844] [2024-10-11 14:32:04,650 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-10-11 14:32:04,650 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 14:32:04,650 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 14:32:04,652 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 14:32:04,653 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-10-11 14:32:04,699 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2024-10-11 14:32:04,700 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-11 14:32:04,701 INFO L255 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-10-11 14:32:04,702 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 14:32:04,796 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 14:32:04,796 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 14:32:04,888 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 14:32:04,888 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2093343844] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-11 14:32:04,889 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-11 14:32:04,889 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 14 [2024-10-11 14:32:04,889 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [630836889] [2024-10-11 14:32:04,889 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-11 14:32:04,889 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-10-11 14:32:04,931 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 14:32:04,931 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-10-11 14:32:04,931 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2024-10-11 14:32:04,936 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 22 [2024-10-11 14:32:04,936 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 193 places, 457 transitions, 7343 flow. Second operand has 14 states, 14 states have (on average 6.857142857142857) internal successors, (96), 14 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 14:32:04,936 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 14:32:04,936 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 22 [2024-10-11 14:32:04,937 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 14:32:06,689 INFO L124 PetriNetUnfolderBase]: 2879/4991 cut-off events. [2024-10-11 14:32:06,690 INFO L125 PetriNetUnfolderBase]: For 63005/63057 co-relation queries the response was YES. [2024-10-11 14:32:06,715 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34008 conditions, 4991 events. 2879/4991 cut-off events. For 63005/63057 co-relation queries the response was YES. Maximal size of possible extension queue 228. Compared 30727 event pairs, 110 based on Foata normal form. 66/5017 useless extension candidates. Maximal degree in co-relation 32941. Up to 957 conditions per place. [2024-10-11 14:32:06,743 INFO L140 encePairwiseOnDemand]: 14/22 looper letters, 184 selfloop transitions, 509 changer transitions 5/703 dead transitions. [2024-10-11 14:32:06,743 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 224 places, 703 transitions, 11923 flow [2024-10-11 14:32:06,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2024-10-11 14:32:06,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2024-10-11 14:32:06,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 327 transitions. [2024-10-11 14:32:06,745 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.45041322314049587 [2024-10-11 14:32:06,745 INFO L175 Difference]: Start difference. First operand has 193 places, 457 transitions, 7343 flow. Second operand 33 states and 327 transitions. [2024-10-11 14:32:06,745 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 224 places, 703 transitions, 11923 flow [2024-10-11 14:32:07,261 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 216 places, 703 transitions, 10902 flow, removed 309 selfloop flow, removed 8 redundant places. [2024-10-11 14:32:07,271 INFO L231 Difference]: Finished difference. Result has 225 places, 595 transitions, 10155 flow [2024-10-11 14:32:07,271 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=6549, PETRI_DIFFERENCE_MINUEND_PLACES=184, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=454, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=369, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=33, PETRI_FLOW=10155, PETRI_PLACES=225, PETRI_TRANSITIONS=595} [2024-10-11 14:32:07,271 INFO L277 CegarLoopForPetriNet]: 24 programPoint places, 201 predicate places. [2024-10-11 14:32:07,272 INFO L471 AbstractCegarLoop]: Abstraction has has 225 places, 595 transitions, 10155 flow [2024-10-11 14:32:07,272 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 6.857142857142857) internal successors, (96), 14 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 14:32:07,272 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 14:32:07,272 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 14:32:07,284 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2024-10-11 14:32:07,472 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,8 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 14:32:07,473 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-11 14:32:07,473 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 14:32:07,473 INFO L85 PathProgramCache]: Analyzing trace with hash 1325954112, now seen corresponding path program 7 times [2024-10-11 14:32:07,473 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 14:32:07,473 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [289327998] [2024-10-11 14:32:07,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 14:32:07,474 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 14:32:07,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 14:32:07,593 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 14:32:07,594 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 14:32:07,594 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [289327998] [2024-10-11 14:32:07,594 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [289327998] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 14:32:07,594 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [559856826] [2024-10-11 14:32:07,594 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-10-11 14:32:07,595 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 14:32:07,595 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 14:32:07,596 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 14:32:07,598 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-10-11 14:32:07,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 14:32:07,647 INFO L255 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-10-11 14:32:07,648 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 14:32:07,718 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 14:32:07,718 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 14:32:07,794 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 14:32:07,795 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [559856826] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-11 14:32:07,795 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-11 14:32:07,795 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 14 [2024-10-11 14:32:07,795 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [955837595] [2024-10-11 14:32:07,795 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-11 14:32:07,795 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-10-11 14:32:07,795 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 14:32:07,796 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-10-11 14:32:07,796 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=133, Unknown=0, NotChecked=0, Total=182 [2024-10-11 14:32:07,820 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 22 [2024-10-11 14:32:07,821 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 225 places, 595 transitions, 10155 flow. Second operand has 14 states, 14 states have (on average 6.5) internal successors, (91), 14 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) [2024-10-11 14:32:07,821 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 14:32:07,821 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 22 [2024-10-11 14:32:07,821 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 14:32:09,514 INFO L124 PetriNetUnfolderBase]: 3233/5574 cut-off events. [2024-10-11 14:32:09,515 INFO L125 PetriNetUnfolderBase]: For 77004/77058 co-relation queries the response was YES. [2024-10-11 14:32:09,539 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39625 conditions, 5574 events. 3233/5574 cut-off events. For 77004/77058 co-relation queries the response was YES. Maximal size of possible extension queue 222. Compared 34084 event pairs, 227 based on Foata normal form. 40/5576 useless extension candidates. Maximal degree in co-relation 39117. Up to 1116 conditions per place. [2024-10-11 14:32:09,570 INFO L140 encePairwiseOnDemand]: 15/22 looper letters, 237 selfloop transitions, 507 changer transitions 3/752 dead transitions. [2024-10-11 14:32:09,570 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 245 places, 752 transitions, 13796 flow [2024-10-11 14:32:09,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2024-10-11 14:32:09,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2024-10-11 14:32:09,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 250 transitions. [2024-10-11 14:32:09,572 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.49407114624505927 [2024-10-11 14:32:09,572 INFO L175 Difference]: Start difference. First operand has 225 places, 595 transitions, 10155 flow. Second operand 23 states and 250 transitions. [2024-10-11 14:32:09,572 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 245 places, 752 transitions, 13796 flow [2024-10-11 14:32:10,118 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 241 places, 752 transitions, 13518 flow, removed 97 selfloop flow, removed 4 redundant places. [2024-10-11 14:32:10,128 INFO L231 Difference]: Finished difference. Result has 245 places, 660 transitions, 12460 flow [2024-10-11 14:32:10,129 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=9780, PETRI_DIFFERENCE_MINUEND_PLACES=219, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=587, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=437, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=148, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=12460, PETRI_PLACES=245, PETRI_TRANSITIONS=660} [2024-10-11 14:32:10,129 INFO L277 CegarLoopForPetriNet]: 24 programPoint places, 221 predicate places. [2024-10-11 14:32:10,129 INFO L471 AbstractCegarLoop]: Abstraction has has 245 places, 660 transitions, 12460 flow [2024-10-11 14:32:10,130 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 6.5) internal successors, (91), 14 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) [2024-10-11 14:32:10,130 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 14:32:10,130 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 14:32:10,142 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-10-11 14:32:10,330 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2024-10-11 14:32:10,330 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-11 14:32:10,331 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 14:32:10,331 INFO L85 PathProgramCache]: Analyzing trace with hash -60427610, now seen corresponding path program 8 times [2024-10-11 14:32:10,331 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 14:32:10,331 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2071528078] [2024-10-11 14:32:10,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 14:32:10,331 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 14:32:10,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 14:32:10,545 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 14:32:10,546 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 14:32:10,546 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2071528078] [2024-10-11 14:32:10,546 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2071528078] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 14:32:10,547 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1855061736] [2024-10-11 14:32:10,547 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-11 14:32:10,547 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 14:32:10,547 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 14:32:10,549 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 14:32:10,552 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-10-11 14:32:10,598 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-11 14:32:10,599 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-11 14:32:10,600 INFO L255 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-10-11 14:32:10,601 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 14:32:10,674 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 14:32:10,675 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 14:32:10,765 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 14:32:10,765 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1855061736] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-11 14:32:10,765 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-11 14:32:10,765 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 16 [2024-10-11 14:32:10,766 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1298810197] [2024-10-11 14:32:10,767 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-11 14:32:10,767 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-10-11 14:32:10,767 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 14:32:10,768 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-10-11 14:32:10,768 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2024-10-11 14:32:10,777 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 22 [2024-10-11 14:32:10,778 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 245 places, 660 transitions, 12460 flow. Second operand has 16 states, 16 states have (on average 6.4375) internal successors, (103), 16 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 14:32:10,778 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 14:32:10,778 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 22 [2024-10-11 14:32:10,778 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 14:32:12,653 INFO L124 PetriNetUnfolderBase]: 4095/7043 cut-off events. [2024-10-11 14:32:12,653 INFO L125 PetriNetUnfolderBase]: For 117761/117825 co-relation queries the response was YES. [2024-10-11 14:32:12,685 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53687 conditions, 7043 events. 4095/7043 cut-off events. For 117761/117825 co-relation queries the response was YES. Maximal size of possible extension queue 266. Compared 44957 event pairs, 297 based on Foata normal form. 82/7059 useless extension candidates. Maximal degree in co-relation 52822. Up to 1329 conditions per place. [2024-10-11 14:32:12,722 INFO L140 encePairwiseOnDemand]: 14/22 looper letters, 242 selfloop transitions, 691 changer transitions 9/947 dead transitions. [2024-10-11 14:32:12,722 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 270 places, 947 transitions, 19101 flow [2024-10-11 14:32:12,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2024-10-11 14:32:12,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2024-10-11 14:32:12,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 278 transitions. [2024-10-11 14:32:12,724 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4512987012987013 [2024-10-11 14:32:12,724 INFO L175 Difference]: Start difference. First operand has 245 places, 660 transitions, 12460 flow. Second operand 28 states and 278 transitions. [2024-10-11 14:32:12,724 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 270 places, 947 transitions, 19101 flow [2024-10-11 14:32:13,923 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 265 places, 947 transitions, 18582 flow, removed 127 selfloop flow, removed 5 redundant places. [2024-10-11 14:32:13,938 INFO L231 Difference]: Finished difference. Result has 275 places, 865 transitions, 18660 flow [2024-10-11 14:32:13,938 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=12055, PETRI_DIFFERENCE_MINUEND_PLACES=238, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=660, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=506, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=127, PETRI_DIFFERENCE_SUBTRAHEND_STATES=28, PETRI_FLOW=18660, PETRI_PLACES=275, PETRI_TRANSITIONS=865} [2024-10-11 14:32:13,939 INFO L277 CegarLoopForPetriNet]: 24 programPoint places, 251 predicate places. [2024-10-11 14:32:13,939 INFO L471 AbstractCegarLoop]: Abstraction has has 275 places, 865 transitions, 18660 flow [2024-10-11 14:32:13,939 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 6.4375) internal successors, (103), 16 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 14:32:13,939 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 14:32:13,939 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 14:32:13,954 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2024-10-11 14:32:14,139 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,10 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 14:32:14,140 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-11 14:32:14,140 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 14:32:14,140 INFO L85 PathProgramCache]: Analyzing trace with hash -248406802, now seen corresponding path program 9 times [2024-10-11 14:32:14,140 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 14:32:14,140 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1891246223] [2024-10-11 14:32:14,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 14:32:14,141 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 14:32:14,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 14:32:14,277 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 14:32:14,277 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 14:32:14,277 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1891246223] [2024-10-11 14:32:14,277 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1891246223] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 14:32:14,277 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [100024143] [2024-10-11 14:32:14,277 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-10-11 14:32:14,278 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 14:32:14,278 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 14:32:14,279 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 14:32:14,281 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-10-11 14:32:14,327 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-10-11 14:32:14,327 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-11 14:32:14,329 INFO L255 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-10-11 14:32:14,330 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 14:32:14,400 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 14:32:14,400 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 14:32:14,489 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 14:32:14,489 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [100024143] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-11 14:32:14,489 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-11 14:32:14,490 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 15 [2024-10-11 14:32:14,490 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2030993876] [2024-10-11 14:32:14,490 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-11 14:32:14,490 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-10-11 14:32:14,491 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 14:32:14,491 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-10-11 14:32:14,492 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=153, Unknown=0, NotChecked=0, Total=210 [2024-10-11 14:32:14,514 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 22 [2024-10-11 14:32:14,515 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 275 places, 865 transitions, 18660 flow. Second operand has 15 states, 15 states have (on average 6.4) internal successors, (96), 15 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 14:32:14,515 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 14:32:14,516 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 22 [2024-10-11 14:32:14,516 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 14:32:16,617 INFO L124 PetriNetUnfolderBase]: 4066/7007 cut-off events. [2024-10-11 14:32:16,617 INFO L125 PetriNetUnfolderBase]: For 142227/142287 co-relation queries the response was YES. [2024-10-11 14:32:16,652 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58388 conditions, 7007 events. 4066/7007 cut-off events. For 142227/142287 co-relation queries the response was YES. Maximal size of possible extension queue 261. Compared 45100 event pairs, 626 based on Foata normal form. 40/6969 useless extension candidates. Maximal degree in co-relation 57566. Up to 2819 conditions per place. [2024-10-11 14:32:16,690 INFO L140 encePairwiseOnDemand]: 15/22 looper letters, 398 selfloop transitions, 501 changer transitions 3/907 dead transitions. [2024-10-11 14:32:16,691 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 287 places, 907 transitions, 20775 flow [2024-10-11 14:32:16,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-10-11 14:32:16,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-10-11 14:32:16,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 147 transitions. [2024-10-11 14:32:16,692 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4772727272727273 [2024-10-11 14:32:16,692 INFO L175 Difference]: Start difference. First operand has 275 places, 865 transitions, 18660 flow. Second operand 14 states and 147 transitions. [2024-10-11 14:32:16,692 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 287 places, 907 transitions, 20775 flow [2024-10-11 14:32:18,076 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 278 places, 907 transitions, 19966 flow, removed 202 selfloop flow, removed 9 redundant places. [2024-10-11 14:32:18,090 INFO L231 Difference]: Finished difference. Result has 280 places, 865 transitions, 18876 flow [2024-10-11 14:32:18,090 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=17814, PETRI_DIFFERENCE_MINUEND_PLACES=265, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=863, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=498, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=362, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=18876, PETRI_PLACES=280, PETRI_TRANSITIONS=865} [2024-10-11 14:32:18,091 INFO L277 CegarLoopForPetriNet]: 24 programPoint places, 256 predicate places. [2024-10-11 14:32:18,091 INFO L471 AbstractCegarLoop]: Abstraction has has 280 places, 865 transitions, 18876 flow [2024-10-11 14:32:18,091 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 6.4) internal successors, (96), 15 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 14:32:18,091 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 14:32:18,091 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 14:32:18,103 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2024-10-11 14:32:18,291 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2024-10-11 14:32:18,292 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-11 14:32:18,292 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 14:32:18,292 INFO L85 PathProgramCache]: Analyzing trace with hash -1083488188, now seen corresponding path program 10 times [2024-10-11 14:32:18,292 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 14:32:18,292 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1276367456] [2024-10-11 14:32:18,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 14:32:18,292 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 14:32:18,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 14:32:18,428 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 14:32:18,428 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 14:32:18,429 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1276367456] [2024-10-11 14:32:18,429 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1276367456] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 14:32:18,429 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1930277708] [2024-10-11 14:32:18,429 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-10-11 14:32:18,429 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 14:32:18,429 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 14:32:18,431 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 14:32:18,432 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-10-11 14:32:18,482 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-10-11 14:32:18,482 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-11 14:32:18,483 INFO L255 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-10-11 14:32:18,484 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 14:32:18,572 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 14:32:18,573 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 14:32:18,678 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 14:32:18,678 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1930277708] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-11 14:32:18,678 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-11 14:32:18,678 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 15 [2024-10-11 14:32:18,678 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [480466074] [2024-10-11 14:32:18,678 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-11 14:32:18,678 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-10-11 14:32:18,679 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 14:32:18,679 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-10-11 14:32:18,679 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2024-10-11 14:32:18,689 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 22 [2024-10-11 14:32:18,689 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 280 places, 865 transitions, 18876 flow. Second operand has 15 states, 15 states have (on average 6.666666666666667) internal successors, (100), 15 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 14:32:18,689 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 14:32:18,689 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 22 [2024-10-11 14:32:18,689 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 14:32:21,765 INFO L124 PetriNetUnfolderBase]: 4901/8548 cut-off events. [2024-10-11 14:32:21,765 INFO L125 PetriNetUnfolderBase]: For 173291/173355 co-relation queries the response was YES. [2024-10-11 14:32:21,811 INFO L83 FinitePrefix]: Finished finitePrefix Result has 70974 conditions, 8548 events. 4901/8548 cut-off events. For 173291/173355 co-relation queries the response was YES. Maximal size of possible extension queue 314. Compared 57511 event pairs, 385 based on Foata normal form. 123/8575 useless extension candidates. Maximal degree in co-relation 69875. Up to 1782 conditions per place. [2024-10-11 14:32:21,845 INFO L140 encePairwiseOnDemand]: 14/22 looper letters, 395 selfloop transitions, 843 changer transitions 1/1244 dead transitions. [2024-10-11 14:32:21,845 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 320 places, 1244 transitions, 28054 flow [2024-10-11 14:32:21,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2024-10-11 14:32:21,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2024-10-11 14:32:21,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 422 transitions. [2024-10-11 14:32:21,847 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.44608879492600423 [2024-10-11 14:32:21,847 INFO L175 Difference]: Start difference. First operand has 280 places, 865 transitions, 18876 flow. Second operand 43 states and 422 transitions. [2024-10-11 14:32:21,847 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 320 places, 1244 transitions, 28054 flow [2024-10-11 14:32:23,399 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 309 places, 1244 transitions, 27128 flow, removed 14 selfloop flow, removed 11 redundant places. [2024-10-11 14:32:23,419 INFO L231 Difference]: Finished difference. Result has 326 places, 1091 transitions, 26431 flow [2024-10-11 14:32:23,420 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=18083, PETRI_DIFFERENCE_MINUEND_PLACES=267, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=862, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=627, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=190, PETRI_DIFFERENCE_SUBTRAHEND_STATES=43, PETRI_FLOW=26431, PETRI_PLACES=326, PETRI_TRANSITIONS=1091} [2024-10-11 14:32:23,420 INFO L277 CegarLoopForPetriNet]: 24 programPoint places, 302 predicate places. [2024-10-11 14:32:23,420 INFO L471 AbstractCegarLoop]: Abstraction has has 326 places, 1091 transitions, 26431 flow [2024-10-11 14:32:23,420 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 6.666666666666667) internal successors, (100), 15 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 14:32:23,420 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 14:32:23,421 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 14:32:23,437 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2024-10-11 14:32:23,621 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2024-10-11 14:32:23,621 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-11 14:32:23,622 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 14:32:23,622 INFO L85 PathProgramCache]: Analyzing trace with hash -1668580498, now seen corresponding path program 11 times [2024-10-11 14:32:23,622 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 14:32:23,622 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1722169922] [2024-10-11 14:32:23,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 14:32:23,622 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 14:32:23,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 14:32:23,740 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 14:32:23,740 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 14:32:23,740 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1722169922] [2024-10-11 14:32:23,741 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1722169922] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 14:32:23,741 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2079115004] [2024-10-11 14:32:23,741 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-10-11 14:32:23,741 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 14:32:23,741 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 14:32:23,743 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 14:32:23,744 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-10-11 14:32:23,793 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-11 14:32:23,794 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-11 14:32:23,795 INFO L255 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-10-11 14:32:23,797 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 14:32:23,849 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 14:32:23,849 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 14:32:23,932 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 14:32:23,933 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2079115004] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-11 14:32:23,933 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-11 14:32:23,933 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2024-10-11 14:32:23,933 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1815647519] [2024-10-11 14:32:23,933 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-11 14:32:23,933 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-10-11 14:32:23,934 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 14:32:23,934 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-10-11 14:32:23,934 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2024-10-11 14:32:23,947 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 22 [2024-10-11 14:32:23,947 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 326 places, 1091 transitions, 26431 flow. Second operand has 13 states, 13 states have (on average 6.384615384615385) internal successors, (83), 13 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 14:32:23,947 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 14:32:23,948 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 22 [2024-10-11 14:32:23,948 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 14:32:26,682 INFO L124 PetriNetUnfolderBase]: 4961/8664 cut-off events. [2024-10-11 14:32:26,682 INFO L125 PetriNetUnfolderBase]: For 210186/210256 co-relation queries the response was YES. [2024-10-11 14:32:26,740 INFO L83 FinitePrefix]: Finished finitePrefix Result has 77783 conditions, 8664 events. 4961/8664 cut-off events. For 210186/210256 co-relation queries the response was YES. Maximal size of possible extension queue 315. Compared 58580 event pairs, 1714 based on Foata normal form. 48/8621 useless extension candidates. Maximal degree in co-relation 76564. Up to 6637 conditions per place. [2024-10-11 14:32:26,935 INFO L140 encePairwiseOnDemand]: 15/22 looper letters, 981 selfloop transitions, 177 changer transitions 4/1167 dead transitions. [2024-10-11 14:32:26,935 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 337 places, 1167 transitions, 30031 flow [2024-10-11 14:32:26,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-10-11 14:32:26,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-10-11 14:32:26,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 114 transitions. [2024-10-11 14:32:26,937 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4318181818181818 [2024-10-11 14:32:26,937 INFO L175 Difference]: Start difference. First operand has 326 places, 1091 transitions, 26431 flow. Second operand 12 states and 114 transitions. [2024-10-11 14:32:26,937 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 337 places, 1167 transitions, 30031 flow [2024-10-11 14:32:29,266 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 325 places, 1167 transitions, 29639 flow, removed 58 selfloop flow, removed 12 redundant places. [2024-10-11 14:32:29,287 INFO L231 Difference]: Finished difference. Result has 331 places, 1117 transitions, 27278 flow [2024-10-11 14:32:29,288 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=26047, PETRI_DIFFERENCE_MINUEND_PLACES=314, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1091, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=156, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=924, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=27278, PETRI_PLACES=331, PETRI_TRANSITIONS=1117} [2024-10-11 14:32:29,288 INFO L277 CegarLoopForPetriNet]: 24 programPoint places, 307 predicate places. [2024-10-11 14:32:29,288 INFO L471 AbstractCegarLoop]: Abstraction has has 331 places, 1117 transitions, 27278 flow [2024-10-11 14:32:29,288 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 6.384615384615385) internal successors, (83), 13 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 14:32:29,288 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 14:32:29,289 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 14:32:29,302 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2024-10-11 14:32:29,489 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2024-10-11 14:32:29,489 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-11 14:32:29,490 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 14:32:29,490 INFO L85 PathProgramCache]: Analyzing trace with hash -386093682, now seen corresponding path program 12 times [2024-10-11 14:32:29,490 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 14:32:29,490 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1225136484] [2024-10-11 14:32:29,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 14:32:29,490 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 14:32:29,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 14:32:29,639 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 14:32:29,640 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 14:32:29,640 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1225136484] [2024-10-11 14:32:29,640 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1225136484] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 14:32:29,640 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [501828006] [2024-10-11 14:32:29,641 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-10-11 14:32:29,641 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 14:32:29,641 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 14:32:29,642 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 14:32:29,644 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-10-11 14:32:29,693 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2024-10-11 14:32:29,693 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-11 14:32:29,695 INFO L255 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-10-11 14:32:29,696 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 14:32:29,770 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 14:32:29,771 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 14:32:29,879 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 14:32:29,879 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [501828006] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-11 14:32:29,879 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-11 14:32:29,879 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 15 [2024-10-11 14:32:29,879 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [214719370] [2024-10-11 14:32:29,879 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-11 14:32:29,880 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-10-11 14:32:29,880 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 14:32:29,880 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-10-11 14:32:29,880 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2024-10-11 14:32:29,890 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 22 [2024-10-11 14:32:29,891 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 331 places, 1117 transitions, 27278 flow. Second operand has 15 states, 15 states have (on average 6.533333333333333) internal successors, (98), 15 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) [2024-10-11 14:32:29,891 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 14:32:29,892 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 22 [2024-10-11 14:32:29,892 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 14:32:35,590 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-10-11 14:32:38,379 INFO L124 PetriNetUnfolderBase]: 6505/11382 cut-off events. [2024-10-11 14:32:38,379 INFO L125 PetriNetUnfolderBase]: For 289095/289187 co-relation queries the response was YES. [2024-10-11 14:32:38,460 INFO L83 FinitePrefix]: Finished finitePrefix Result has 103184 conditions, 11382 events. 6505/11382 cut-off events. For 289095/289187 co-relation queries the response was YES. Maximal size of possible extension queue 423. Compared 80661 event pairs, 943 based on Foata normal form. 156/11423 useless extension candidates. Maximal degree in co-relation 102060. Up to 3724 conditions per place. [2024-10-11 14:32:38,512 INFO L140 encePairwiseOnDemand]: 14/22 looper letters, 880 selfloop transitions, 771 changer transitions 2/1658 dead transitions. [2024-10-11 14:32:38,512 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 366 places, 1658 transitions, 42134 flow [2024-10-11 14:32:38,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2024-10-11 14:32:38,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2024-10-11 14:32:38,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 381 transitions. [2024-10-11 14:32:38,514 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4557416267942584 [2024-10-11 14:32:38,514 INFO L175 Difference]: Start difference. First operand has 331 places, 1117 transitions, 27278 flow. Second operand 38 states and 381 transitions. [2024-10-11 14:32:38,514 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 366 places, 1658 transitions, 42134 flow [2024-10-11 14:32:42,915 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 358 places, 1658 transitions, 41941 flow, removed 70 selfloop flow, removed 8 redundant places. [2024-10-11 14:32:42,944 INFO L231 Difference]: Finished difference. Result has 377 places, 1421 transitions, 37939 flow [2024-10-11 14:32:42,945 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=27003, PETRI_DIFFERENCE_MINUEND_PLACES=321, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1111, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=488, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=505, PETRI_DIFFERENCE_SUBTRAHEND_STATES=38, PETRI_FLOW=37939, PETRI_PLACES=377, PETRI_TRANSITIONS=1421} [2024-10-11 14:32:42,945 INFO L277 CegarLoopForPetriNet]: 24 programPoint places, 353 predicate places. [2024-10-11 14:32:42,945 INFO L471 AbstractCegarLoop]: Abstraction has has 377 places, 1421 transitions, 37939 flow [2024-10-11 14:32:42,946 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 6.533333333333333) internal successors, (98), 15 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) [2024-10-11 14:32:42,946 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 14:32:42,946 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 14:32:42,960 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2024-10-11 14:32:43,146 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,14 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 14:32:43,146 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-11 14:32:43,147 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 14:32:43,147 INFO L85 PathProgramCache]: Analyzing trace with hash -1833216398, now seen corresponding path program 13 times [2024-10-11 14:32:43,147 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 14:32:43,147 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1126244617] [2024-10-11 14:32:43,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 14:32:43,147 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 14:32:43,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 14:32:43,274 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 14:32:43,274 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 14:32:43,274 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1126244617] [2024-10-11 14:32:43,274 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1126244617] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 14:32:43,275 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [846779618] [2024-10-11 14:32:43,275 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-10-11 14:32:43,275 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 14:32:43,275 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 14:32:43,277 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 14:32:43,279 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-10-11 14:32:43,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 14:32:43,326 INFO L255 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-10-11 14:32:43,327 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 14:32:43,392 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 14:32:43,392 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 14:32:43,490 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 14:32:43,490 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [846779618] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-11 14:32:43,490 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-11 14:32:43,490 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 15 [2024-10-11 14:32:43,490 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1694770996] [2024-10-11 14:32:43,490 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-11 14:32:43,490 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-10-11 14:32:43,491 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 14:32:43,491 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-10-11 14:32:43,491 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2024-10-11 14:32:43,493 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 22 [2024-10-11 14:32:43,494 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 377 places, 1421 transitions, 37939 flow. Second operand has 15 states, 15 states have (on average 6.666666666666667) internal successors, (100), 15 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 14:32:43,494 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 14:32:43,494 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 22 [2024-10-11 14:32:43,494 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 14:32:49,954 INFO L124 PetriNetUnfolderBase]: 7166/12498 cut-off events. [2024-10-11 14:32:49,954 INFO L125 PetriNetUnfolderBase]: For 375773/375875 co-relation queries the response was YES. [2024-10-11 14:32:50,050 INFO L83 FinitePrefix]: Finished finitePrefix Result has 121490 conditions, 12498 events. 7166/12498 cut-off events. For 375773/375875 co-relation queries the response was YES. Maximal size of possible extension queue 482. Compared 89975 event pairs, 941 based on Foata normal form. 97/12470 useless extension candidates. Maximal degree in co-relation 120461. Up to 4745 conditions per place. [2024-10-11 14:32:50,107 INFO L140 encePairwiseOnDemand]: 14/22 looper letters, 650 selfloop transitions, 971 changer transitions 7/1633 dead transitions. [2024-10-11 14:32:50,107 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 396 places, 1633 transitions, 45894 flow [2024-10-11 14:32:50,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2024-10-11 14:32:50,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2024-10-11 14:32:50,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 202 transitions. [2024-10-11 14:32:50,109 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4590909090909091 [2024-10-11 14:32:50,109 INFO L175 Difference]: Start difference. First operand has 377 places, 1421 transitions, 37939 flow. Second operand 20 states and 202 transitions. [2024-10-11 14:32:50,109 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 396 places, 1633 transitions, 45894 flow [2024-10-11 14:32:55,896 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 391 places, 1633 transitions, 45283 flow, removed 233 selfloop flow, removed 5 redundant places. [2024-10-11 14:32:55,933 INFO L231 Difference]: Finished difference. Result has 399 places, 1566 transitions, 44651 flow [2024-10-11 14:32:55,935 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=37286, PETRI_DIFFERENCE_MINUEND_PLACES=372, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1418, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=836, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=501, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=44651, PETRI_PLACES=399, PETRI_TRANSITIONS=1566} [2024-10-11 14:32:55,935 INFO L277 CegarLoopForPetriNet]: 24 programPoint places, 375 predicate places. [2024-10-11 14:32:55,935 INFO L471 AbstractCegarLoop]: Abstraction has has 399 places, 1566 transitions, 44651 flow [2024-10-11 14:32:55,936 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 6.666666666666667) internal successors, (100), 15 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 14:32:55,936 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 14:32:55,936 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 14:32:55,952 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2024-10-11 14:32:56,136 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,15 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 14:32:56,136 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-11 14:32:56,137 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 14:32:56,137 INFO L85 PathProgramCache]: Analyzing trace with hash 771047482, now seen corresponding path program 14 times [2024-10-11 14:32:56,137 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 14:32:56,137 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1983480374] [2024-10-11 14:32:56,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 14:32:56,137 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 14:32:56,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 14:32:56,236 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 14:32:56,237 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 14:32:56,237 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1983480374] [2024-10-11 14:32:56,237 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1983480374] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 14:32:56,237 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [457736808] [2024-10-11 14:32:56,237 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-11 14:32:56,238 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 14:32:56,238 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 14:32:56,239 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 14:32:56,241 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2024-10-11 14:32:56,288 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-11 14:32:56,289 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-11 14:32:56,289 INFO L255 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-10-11 14:32:56,290 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 14:32:56,338 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 14:32:56,339 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 14:32:56,400 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 14:32:56,400 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [457736808] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-11 14:32:56,400 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-11 14:32:56,400 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 15 [2024-10-11 14:32:56,400 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2041847002] [2024-10-11 14:32:56,400 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-11 14:32:56,401 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-10-11 14:32:56,401 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 14:32:56,401 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-10-11 14:32:56,401 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2024-10-11 14:32:56,411 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 22 [2024-10-11 14:32:56,412 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 399 places, 1566 transitions, 44651 flow. Second operand has 15 states, 15 states have (on average 6.333333333333333) internal successors, (95), 15 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 14:32:56,412 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 14:32:56,412 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 22 [2024-10-11 14:32:56,412 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 14:33:03,092 INFO L124 PetriNetUnfolderBase]: 8959/15472 cut-off events. [2024-10-11 14:33:03,092 INFO L125 PetriNetUnfolderBase]: For 547552/547690 co-relation queries the response was YES. [2024-10-11 14:33:03,259 INFO L83 FinitePrefix]: Finished finitePrefix Result has 158929 conditions, 15472 events. 8959/15472 cut-off events. For 547552/547690 co-relation queries the response was YES. Maximal size of possible extension queue 602. Compared 113378 event pairs, 2139 based on Foata normal form. 86/15425 useless extension candidates. Maximal degree in co-relation 157773. Up to 9119 conditions per place. [2024-10-11 14:33:03,361 INFO L140 encePairwiseOnDemand]: 14/22 looper letters, 1182 selfloop transitions, 857 changer transitions 0/2044 dead transitions. [2024-10-11 14:33:03,361 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 418 places, 2044 transitions, 61439 flow [2024-10-11 14:33:03,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2024-10-11 14:33:03,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2024-10-11 14:33:03,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 207 transitions. [2024-10-11 14:33:03,363 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.47045454545454546 [2024-10-11 14:33:03,363 INFO L175 Difference]: Start difference. First operand has 399 places, 1566 transitions, 44651 flow. Second operand 20 states and 207 transitions. [2024-10-11 14:33:03,363 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 418 places, 2044 transitions, 61439 flow [2024-10-11 14:33:11,214 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 411 places, 2044 transitions, 60958 flow, removed 110 selfloop flow, removed 7 redundant places. [2024-10-11 14:33:11,255 INFO L231 Difference]: Finished difference. Result has 419 places, 1952 transitions, 58546 flow [2024-10-11 14:33:11,257 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=44190, PETRI_DIFFERENCE_MINUEND_PLACES=392, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1566, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=524, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=916, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=58546, PETRI_PLACES=419, PETRI_TRANSITIONS=1952} [2024-10-11 14:33:11,257 INFO L277 CegarLoopForPetriNet]: 24 programPoint places, 395 predicate places. [2024-10-11 14:33:11,257 INFO L471 AbstractCegarLoop]: Abstraction has has 419 places, 1952 transitions, 58546 flow [2024-10-11 14:33:11,257 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 6.333333333333333) internal successors, (95), 15 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 14:33:11,258 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 14:33:11,258 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 14:33:11,270 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2024-10-11 14:33:11,460 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,16 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 14:33:11,460 INFO L396 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-11 14:33:11,461 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 14:33:11,461 INFO L85 PathProgramCache]: Analyzing trace with hash 1312145248, now seen corresponding path program 15 times [2024-10-11 14:33:11,461 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 14:33:11,461 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [307470485] [2024-10-11 14:33:11,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 14:33:11,461 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 14:33:11,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 14:33:11,583 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 14:33:11,584 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 14:33:11,584 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [307470485] [2024-10-11 14:33:11,584 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [307470485] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 14:33:11,584 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1680900699] [2024-10-11 14:33:11,584 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-10-11 14:33:11,584 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 14:33:11,585 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 14:33:11,586 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 14:33:11,588 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2024-10-11 14:33:11,628 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-10-11 14:33:11,628 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-11 14:33:11,628 INFO L255 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-10-11 14:33:11,629 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 14:33:11,675 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 14:33:11,676 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 14:33:11,747 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 14:33:11,747 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1680900699] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-11 14:33:11,747 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-11 14:33:11,747 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 14 [2024-10-11 14:33:11,748 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1945877300] [2024-10-11 14:33:11,748 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-11 14:33:11,748 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-10-11 14:33:11,748 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 14:33:11,748 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-10-11 14:33:11,749 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2024-10-11 14:33:11,757 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 22 [2024-10-11 14:33:11,758 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 419 places, 1952 transitions, 58546 flow. Second operand has 14 states, 14 states have (on average 6.214285714285714) internal successors, (87), 14 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 14:33:11,758 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 14:33:11,758 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 22 [2024-10-11 14:33:11,758 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand