./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/parallel-parallel-sum-1.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/parallel-parallel-sum-1.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 b1e99af7c76570461a4b0ac70d664412f250ec04f47fd9ca8c0f85236f1348c6 --- Real Ultimate output --- This is Ultimate 0.2.5-dev-84cfde4 [2024-10-11 14:29:49,661 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-10-11 14:29:49,723 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-10-11 14:29:49,729 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-10-11 14:29:49,731 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-10-11 14:29:49,757 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-10-11 14:29:49,757 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-10-11 14:29:49,758 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-10-11 14:29:49,758 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-10-11 14:29:49,760 INFO L153 SettingsManager]: * Use memory slicer=true [2024-10-11 14:29:49,760 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-10-11 14:29:49,761 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-10-11 14:29:49,761 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-10-11 14:29:49,763 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-10-11 14:29:49,763 INFO L153 SettingsManager]: * Use SBE=true [2024-10-11 14:29:49,764 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-10-11 14:29:49,764 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-10-11 14:29:49,764 INFO L153 SettingsManager]: * sizeof long=4 [2024-10-11 14:29:49,764 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-10-11 14:29:49,765 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-10-11 14:29:49,765 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-10-11 14:29:49,768 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-10-11 14:29:49,768 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-10-11 14:29:49,768 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-10-11 14:29:49,768 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-10-11 14:29:49,769 INFO L153 SettingsManager]: * sizeof long double=12 [2024-10-11 14:29:49,769 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-10-11 14:29:49,769 INFO L153 SettingsManager]: * Use constant arrays=true [2024-10-11 14:29:49,769 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-10-11 14:29:49,769 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-10-11 14:29:49,769 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-10-11 14:29:49,770 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-10-11 14:29:49,770 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-11 14:29:49,770 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-10-11 14:29:49,770 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-10-11 14:29:49,770 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-10-11 14:29:49,771 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-10-11 14:29:49,771 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-10-11 14:29:49,771 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-10-11 14:29:49,773 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-10-11 14:29:49,773 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-10-11 14:29:49,774 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-10-11 14:29:49,774 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> b1e99af7c76570461a4b0ac70d664412f250ec04f47fd9ca8c0f85236f1348c6 [2024-10-11 14:29:50,010 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-10-11 14:29:50,035 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-10-11 14:29:50,037 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-10-11 14:29:50,039 INFO L270 PluginConnector]: Initializing CDTParser... [2024-10-11 14:29:50,039 INFO L274 PluginConnector]: CDTParser initialized [2024-10-11 14:29:50,040 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/parallel-parallel-sum-1.wvr.c [2024-10-11 14:29:51,511 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-10-11 14:29:51,726 INFO L384 CDTParser]: Found 1 translation units. [2024-10-11 14:29:51,726 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/parallel-parallel-sum-1.wvr.c [2024-10-11 14:29:51,733 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/data/180b9790d/e9597c13c4f542bcab6e2925d0048183/FLAG11f00a349 [2024-10-11 14:29:52,080 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/data/180b9790d/e9597c13c4f542bcab6e2925d0048183 [2024-10-11 14:29:52,083 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-10-11 14:29:52,084 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-10-11 14:29:52,087 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-10-11 14:29:52,087 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-10-11 14:29:52,093 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-10-11 14:29:52,094 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.10 02:29:52" (1/1) ... [2024-10-11 14:29:52,094 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7513fc71 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:29:52, skipping insertion in model container [2024-10-11 14:29:52,095 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.10 02:29:52" (1/1) ... [2024-10-11 14:29:52,122 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-10-11 14:29:52,350 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/parallel-parallel-sum-1.wvr.c[3694,3707] [2024-10-11 14:29:52,365 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-11 14:29:52,378 INFO L200 MainTranslator]: Completed pre-run [2024-10-11 14:29:52,413 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/parallel-parallel-sum-1.wvr.c[3694,3707] [2024-10-11 14:29:52,425 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-11 14:29:52,444 INFO L204 MainTranslator]: Completed translation [2024-10-11 14:29:52,444 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:29:52 WrapperNode [2024-10-11 14:29:52,445 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-10-11 14:29:52,446 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-10-11 14:29:52,446 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-10-11 14:29:52,446 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-10-11 14:29:52,453 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:29:52" (1/1) ... [2024-10-11 14:29:52,461 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:29:52" (1/1) ... [2024-10-11 14:29:52,493 INFO L138 Inliner]: procedures = 26, calls = 48, calls flagged for inlining = 18, calls inlined = 24, statements flattened = 295 [2024-10-11 14:29:52,494 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-10-11 14:29:52,494 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-10-11 14:29:52,495 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-10-11 14:29:52,495 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-10-11 14:29:52,508 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:29:52" (1/1) ... [2024-10-11 14:29:52,508 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:29:52" (1/1) ... [2024-10-11 14:29:52,513 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:29:52" (1/1) ... [2024-10-11 14:29:52,536 INFO L175 MemorySlicer]: Split 7 memory accesses to 2 slices as follows [2, 5]. 71 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0]. The 1 writes are split as follows [0, 1]. [2024-10-11 14:29:52,537 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:29:52" (1/1) ... [2024-10-11 14:29:52,537 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:29:52" (1/1) ... [2024-10-11 14:29:52,550 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:29:52" (1/1) ... [2024-10-11 14:29:52,556 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:29:52" (1/1) ... [2024-10-11 14:29:52,558 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:29:52" (1/1) ... [2024-10-11 14:29:52,560 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:29:52" (1/1) ... [2024-10-11 14:29:52,563 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-10-11 14:29:52,564 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-10-11 14:29:52,564 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-10-11 14:29:52,564 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-10-11 14:29:52,565 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:29:52" (1/1) ... [2024-10-11 14:29:52,573 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-11 14:29:52,586 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 14:29:52,604 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 14:29:52,607 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 14:29:52,657 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-10-11 14:29:52,657 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-10-11 14:29:52,657 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-10-11 14:29:52,658 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-10-11 14:29:52,658 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-10-11 14:29:52,658 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-10-11 14:29:52,658 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-10-11 14:29:52,659 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-10-11 14:29:52,659 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-10-11 14:29:52,659 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2024-10-11 14:29:52,659 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2024-10-11 14:29:52,660 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2024-10-11 14:29:52,660 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2024-10-11 14:29:52,661 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-10-11 14:29:52,661 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-10-11 14:29:52,661 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-10-11 14:29:52,662 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-10-11 14:29:52,662 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-10-11 14:29:52,662 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-10-11 14:29:52,662 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-10-11 14:29:52,664 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 14:29:52,805 INFO L238 CfgBuilder]: Building ICFG [2024-10-11 14:29:52,808 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-10-11 14:29:53,260 INFO L283 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-10-11 14:29:53,261 INFO L287 CfgBuilder]: Performing block encoding [2024-10-11 14:29:53,640 INFO L309 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-10-11 14:29:53,641 INFO L314 CfgBuilder]: Removed 5 assume(true) statements. [2024-10-11 14:29:53,642 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.10 02:29:53 BoogieIcfgContainer [2024-10-11 14:29:53,642 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-10-11 14:29:53,644 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-10-11 14:29:53,645 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-10-11 14:29:53,648 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-10-11 14:29:53,649 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 11.10 02:29:52" (1/3) ... [2024-10-11 14:29:53,649 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@55a0a8d0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.10 02:29:53, skipping insertion in model container [2024-10-11 14:29:53,650 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:29:52" (2/3) ... [2024-10-11 14:29:53,650 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@55a0a8d0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.10 02:29:53, skipping insertion in model container [2024-10-11 14:29:53,650 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.10 02:29:53" (3/3) ... [2024-10-11 14:29:53,652 INFO L112 eAbstractionObserver]: Analyzing ICFG parallel-parallel-sum-1.wvr.c [2024-10-11 14:29:53,669 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-10-11 14:29:53,669 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-10-11 14:29:53,669 INFO L484 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-10-11 14:29:53,732 INFO L143 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2024-10-11 14:29:53,771 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 58 places, 54 transitions, 136 flow [2024-10-11 14:29:53,812 INFO L124 PetriNetUnfolderBase]: 9/50 cut-off events. [2024-10-11 14:29:53,813 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2024-10-11 14:29:53,816 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67 conditions, 50 events. 9/50 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 96 event pairs, 0 based on Foata normal form. 0/40 useless extension candidates. Maximal degree in co-relation 45. Up to 2 conditions per place. [2024-10-11 14:29:53,817 INFO L82 GeneralOperation]: Start removeDead. Operand has 58 places, 54 transitions, 136 flow [2024-10-11 14:29:53,822 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 53 places, 49 transitions, 122 flow [2024-10-11 14:29:53,832 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-10-11 14:29:53,838 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;@256e7292, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-10-11 14:29:53,842 INFO L334 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2024-10-11 14:29:53,861 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-10-11 14:29:53,863 INFO L124 PetriNetUnfolderBase]: 9/48 cut-off events. [2024-10-11 14:29:53,863 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2024-10-11 14:29:53,863 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 14:29:53,864 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 14:29:53,864 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2024-10-11 14:29:53,873 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 14:29:53,873 INFO L85 PathProgramCache]: Analyzing trace with hash -2135655752, now seen corresponding path program 1 times [2024-10-11 14:29:53,882 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 14:29:53,883 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1375428891] [2024-10-11 14:29:53,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 14:29:53,884 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 14:29:54,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 14:29:54,130 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 14:29:54,130 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 14:29:54,131 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1375428891] [2024-10-11 14:29:54,131 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1375428891] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-11 14:29:54,132 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-11 14:29:54,132 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-11 14:29:54,133 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [756339372] [2024-10-11 14:29:54,134 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-11 14:29:54,142 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-10-11 14:29:54,147 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 14:29:54,169 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-10-11 14:29:54,169 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-10-11 14:29:54,170 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 54 [2024-10-11 14:29:54,172 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 49 transitions, 122 flow. Second operand has 2 states, 2 states have (on average 20.5) internal successors, (41), 2 states have internal predecessors, (41), 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 14:29:54,172 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 14:29:54,172 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 54 [2024-10-11 14:29:54,173 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 14:29:56,625 INFO L124 PetriNetUnfolderBase]: 19797/25801 cut-off events. [2024-10-11 14:29:56,627 INFO L125 PetriNetUnfolderBase]: For 1319/1319 co-relation queries the response was YES. [2024-10-11 14:29:56,679 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52712 conditions, 25801 events. 19797/25801 cut-off events. For 1319/1319 co-relation queries the response was YES. Maximal size of possible extension queue 975. Compared 129589 event pairs, 16578 based on Foata normal form. 0/22450 useless extension candidates. Maximal degree in co-relation 49225. Up to 25706 conditions per place. [2024-10-11 14:29:56,889 INFO L140 encePairwiseOnDemand]: 50/54 looper letters, 40 selfloop transitions, 0 changer transitions 0/45 dead transitions. [2024-10-11 14:29:56,889 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 45 transitions, 194 flow [2024-10-11 14:29:56,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-10-11 14:29:56,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2024-10-11 14:29:56,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 62 transitions. [2024-10-11 14:29:56,902 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5740740740740741 [2024-10-11 14:29:56,904 INFO L175 Difference]: Start difference. First operand has 53 places, 49 transitions, 122 flow. Second operand 2 states and 62 transitions. [2024-10-11 14:29:56,905 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 45 transitions, 194 flow [2024-10-11 14:29:56,960 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 45 transitions, 178 flow, removed 0 selfloop flow, removed 8 redundant places. [2024-10-11 14:29:56,963 INFO L231 Difference]: Finished difference. Result has 46 places, 45 transitions, 98 flow [2024-10-11 14:29:56,965 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=98, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=98, PETRI_PLACES=46, PETRI_TRANSITIONS=45} [2024-10-11 14:29:56,969 INFO L277 CegarLoopForPetriNet]: 53 programPoint places, -7 predicate places. [2024-10-11 14:29:56,969 INFO L471 AbstractCegarLoop]: Abstraction has has 46 places, 45 transitions, 98 flow [2024-10-11 14:29:56,969 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 20.5) internal successors, (41), 2 states have internal predecessors, (41), 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 14:29:56,970 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 14:29:56,970 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 14:29:56,970 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-10-11 14:29:56,971 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2024-10-11 14:29:56,971 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 14:29:56,972 INFO L85 PathProgramCache]: Analyzing trace with hash 1532598492, now seen corresponding path program 1 times [2024-10-11 14:29:56,972 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 14:29:56,972 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [34329945] [2024-10-11 14:29:56,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 14:29:56,973 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 14:29:57,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 14:29:57,256 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 14:29:57,256 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 14:29:57,256 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [34329945] [2024-10-11 14:29:57,257 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [34329945] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-11 14:29:57,257 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-11 14:29:57,257 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-10-11 14:29:57,257 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [310139594] [2024-10-11 14:29:57,257 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-11 14:29:57,258 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-11 14:29:57,258 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 14:29:57,259 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-11 14:29:57,260 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-11 14:29:57,261 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 54 [2024-10-11 14:29:57,261 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 45 transitions, 98 flow. Second operand has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 states have internal predecessors, (54), 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 14:29:57,261 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 14:29:57,261 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 54 [2024-10-11 14:29:57,261 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 14:29:59,923 INFO L124 PetriNetUnfolderBase]: 31442/40888 cut-off events. [2024-10-11 14:29:59,923 INFO L125 PetriNetUnfolderBase]: For 564/564 co-relation queries the response was YES. [2024-10-11 14:29:59,990 INFO L83 FinitePrefix]: Finished finitePrefix Result has 82350 conditions, 40888 events. 31442/40888 cut-off events. For 564/564 co-relation queries the response was YES. Maximal size of possible extension queue 1484. Compared 222608 event pairs, 9215 based on Foata normal form. 1/35408 useless extension candidates. Maximal degree in co-relation 82347. Up to 28277 conditions per place. [2024-10-11 14:30:00,171 INFO L140 encePairwiseOnDemand]: 48/54 looper letters, 69 selfloop transitions, 5 changer transitions 1/80 dead transitions. [2024-10-11 14:30:00,171 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 80 transitions, 325 flow [2024-10-11 14:30:00,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-11 14:30:00,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-10-11 14:30:00,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 103 transitions. [2024-10-11 14:30:00,175 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6358024691358025 [2024-10-11 14:30:00,175 INFO L175 Difference]: Start difference. First operand has 46 places, 45 transitions, 98 flow. Second operand 3 states and 103 transitions. [2024-10-11 14:30:00,175 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 80 transitions, 325 flow [2024-10-11 14:30:00,176 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 80 transitions, 325 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-10-11 14:30:00,182 INFO L231 Difference]: Finished difference. Result has 49 places, 49 transitions, 131 flow [2024-10-11 14:30:00,182 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=98, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=131, PETRI_PLACES=49, PETRI_TRANSITIONS=49} [2024-10-11 14:30:00,183 INFO L277 CegarLoopForPetriNet]: 53 programPoint places, -4 predicate places. [2024-10-11 14:30:00,184 INFO L471 AbstractCegarLoop]: Abstraction has has 49 places, 49 transitions, 131 flow [2024-10-11 14:30:00,184 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 states have internal predecessors, (54), 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 14:30:00,184 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 14:30:00,185 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 14:30:00,185 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-10-11 14:30:00,185 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2024-10-11 14:30:00,186 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 14:30:00,187 INFO L85 PathProgramCache]: Analyzing trace with hash 661163044, now seen corresponding path program 1 times [2024-10-11 14:30:00,188 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 14:30:00,188 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [183245593] [2024-10-11 14:30:00,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 14:30:00,188 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 14:30:00,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 14:30:00,441 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 14:30:00,442 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 14:30:00,442 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [183245593] [2024-10-11 14:30:00,442 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [183245593] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-11 14:30:00,442 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-11 14:30:00,442 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-10-11 14:30:00,443 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [972596088] [2024-10-11 14:30:00,443 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-11 14:30:00,443 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-11 14:30:00,444 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 14:30:00,444 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-11 14:30:00,444 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-10-11 14:30:00,445 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 54 [2024-10-11 14:30:00,445 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 49 transitions, 131 flow. Second operand has 4 states, 4 states have (on average 16.75) internal successors, (67), 4 states have internal predecessors, (67), 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 14:30:00,445 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 14:30:00,445 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 54 [2024-10-11 14:30:00,445 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 14:30:04,143 INFO L124 PetriNetUnfolderBase]: 47784/63010 cut-off events. [2024-10-11 14:30:04,143 INFO L125 PetriNetUnfolderBase]: For 5397/5397 co-relation queries the response was YES. [2024-10-11 14:30:04,235 INFO L83 FinitePrefix]: Finished finitePrefix Result has 136710 conditions, 63010 events. 47784/63010 cut-off events. For 5397/5397 co-relation queries the response was YES. Maximal size of possible extension queue 2331. Compared 366422 event pairs, 40360 based on Foata normal form. 2001/55771 useless extension candidates. Maximal degree in co-relation 136705. Up to 40409 conditions per place. [2024-10-11 14:30:04,392 INFO L140 encePairwiseOnDemand]: 48/54 looper letters, 43 selfloop transitions, 2 changer transitions 35/85 dead transitions. [2024-10-11 14:30:04,393 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 85 transitions, 384 flow [2024-10-11 14:30:04,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-11 14:30:04,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-10-11 14:30:04,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 113 transitions. [2024-10-11 14:30:04,398 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5231481481481481 [2024-10-11 14:30:04,398 INFO L175 Difference]: Start difference. First operand has 49 places, 49 transitions, 131 flow. Second operand 4 states and 113 transitions. [2024-10-11 14:30:04,400 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 85 transitions, 384 flow [2024-10-11 14:30:04,402 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 85 transitions, 376 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-10-11 14:30:04,403 INFO L231 Difference]: Finished difference. Result has 53 places, 50 transitions, 144 flow [2024-10-11 14:30:04,403 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=126, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=144, PETRI_PLACES=53, PETRI_TRANSITIONS=50} [2024-10-11 14:30:04,405 INFO L277 CegarLoopForPetriNet]: 53 programPoint places, 0 predicate places. [2024-10-11 14:30:04,405 INFO L471 AbstractCegarLoop]: Abstraction has has 53 places, 50 transitions, 144 flow [2024-10-11 14:30:04,406 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 16.75) internal successors, (67), 4 states have internal predecessors, (67), 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 14:30:04,406 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 14:30:04,406 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 14:30:04,406 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-10-11 14:30:04,406 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2024-10-11 14:30:04,407 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 14:30:04,407 INFO L85 PathProgramCache]: Analyzing trace with hash 596459146, now seen corresponding path program 1 times [2024-10-11 14:30:04,407 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 14:30:04,408 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1971934650] [2024-10-11 14:30:04,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 14:30:04,408 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 14:30:04,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 14:30:04,580 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 14:30:04,580 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 14:30:04,581 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1971934650] [2024-10-11 14:30:04,581 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1971934650] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 14:30:04,581 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1924861272] [2024-10-11 14:30:04,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 14:30:04,581 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 14:30:04,581 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 14:30:04,584 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 14:30:04,586 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 14:30:04,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 14:30:04,704 INFO L255 TraceCheckSpWp]: Trace formula consists of 237 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-10-11 14:30:04,711 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 14:30:04,848 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 14:30:04,851 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 14:30:04,923 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 14:30:04,924 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1924861272] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-11 14:30:04,925 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-11 14:30:04,925 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 9 [2024-10-11 14:30:04,925 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [672025175] [2024-10-11 14:30:04,925 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-11 14:30:04,926 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-10-11 14:30:04,926 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 14:30:04,928 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-10-11 14:30:04,928 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2024-10-11 14:30:04,928 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 54 [2024-10-11 14:30:04,929 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 50 transitions, 144 flow. Second operand has 10 states, 10 states have (on average 13.6) internal successors, (136), 10 states have internal predecessors, (136), 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 14:30:04,929 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 14:30:04,929 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 54 [2024-10-11 14:30:04,929 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 14:30:08,345 INFO L124 PetriNetUnfolderBase]: 47144/62039 cut-off events. [2024-10-11 14:30:08,346 INFO L125 PetriNetUnfolderBase]: For 6153/6153 co-relation queries the response was YES. [2024-10-11 14:30:08,478 INFO L83 FinitePrefix]: Finished finitePrefix Result has 135879 conditions, 62039 events. 47144/62039 cut-off events. For 6153/6153 co-relation queries the response was YES. Maximal size of possible extension queue 2239. Compared 357349 event pairs, 39870 based on Foata normal form. 2026/55109 useless extension candidates. Maximal degree in co-relation 135872. Up to 40408 conditions per place. [2024-10-11 14:30:08,663 INFO L140 encePairwiseOnDemand]: 48/54 looper letters, 75 selfloop transitions, 5 changer transitions 2/87 dead transitions. [2024-10-11 14:30:08,664 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 87 transitions, 412 flow [2024-10-11 14:30:08,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-10-11 14:30:08,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-10-11 14:30:08,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 132 transitions. [2024-10-11 14:30:08,665 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4074074074074074 [2024-10-11 14:30:08,665 INFO L175 Difference]: Start difference. First operand has 53 places, 50 transitions, 144 flow. Second operand 6 states and 132 transitions. [2024-10-11 14:30:08,665 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 87 transitions, 412 flow [2024-10-11 14:30:08,675 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 87 transitions, 404 flow, removed 3 selfloop flow, removed 1 redundant places. [2024-10-11 14:30:08,677 INFO L231 Difference]: Finished difference. Result has 59 places, 53 transitions, 179 flow [2024-10-11 14:30:08,677 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=138, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=179, PETRI_PLACES=59, PETRI_TRANSITIONS=53} [2024-10-11 14:30:08,678 INFO L277 CegarLoopForPetriNet]: 53 programPoint places, 6 predicate places. [2024-10-11 14:30:08,678 INFO L471 AbstractCegarLoop]: Abstraction has has 59 places, 53 transitions, 179 flow [2024-10-11 14:30:08,678 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 13.6) internal successors, (136), 10 states have internal predecessors, (136), 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 14:30:08,679 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 14:30:08,679 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 14:30:08,699 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-10-11 14:30:08,883 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 14:30:08,884 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2024-10-11 14:30:08,884 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 14:30:08,885 INFO L85 PathProgramCache]: Analyzing trace with hash -576347468, now seen corresponding path program 1 times [2024-10-11 14:30:08,885 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 14:30:08,885 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1506364074] [2024-10-11 14:30:08,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 14:30:08,885 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 14:30:08,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 14:30:09,241 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 14:30:09,242 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 14:30:09,242 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1506364074] [2024-10-11 14:30:09,242 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1506364074] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 14:30:09,243 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1935046660] [2024-10-11 14:30:09,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 14:30:09,243 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 14:30:09,243 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 14:30:09,245 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 14:30:09,246 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 14:30:09,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 14:30:09,349 INFO L255 TraceCheckSpWp]: Trace formula consists of 237 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-10-11 14:30:09,351 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 14:30:09,474 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 14:30:09,474 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 14:30:09,547 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 14:30:09,548 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1935046660] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-11 14:30:09,548 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-11 14:30:09,549 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 9 [2024-10-11 14:30:09,550 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2088871725] [2024-10-11 14:30:09,550 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-11 14:30:09,551 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-10-11 14:30:09,552 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 14:30:09,553 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-10-11 14:30:09,553 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2024-10-11 14:30:09,554 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 54 [2024-10-11 14:30:09,554 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 53 transitions, 179 flow. Second operand has 10 states, 10 states have (on average 14.6) internal successors, (146), 10 states have internal predecessors, (146), 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 14:30:09,554 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 14:30:09,558 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 54 [2024-10-11 14:30:09,558 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 14:30:12,242 INFO L124 PetriNetUnfolderBase]: 35526/46756 cut-off events. [2024-10-11 14:30:12,242 INFO L125 PetriNetUnfolderBase]: For 7614/7614 co-relation queries the response was YES. [2024-10-11 14:30:12,362 INFO L83 FinitePrefix]: Finished finitePrefix Result has 104724 conditions, 46756 events. 35526/46756 cut-off events. For 7614/7614 co-relation queries the response was YES. Maximal size of possible extension queue 1645. Compared 259932 event pairs, 29704 based on Foata normal form. 611/40737 useless extension candidates. Maximal degree in co-relation 104715. Up to 40408 conditions per place. [2024-10-11 14:30:12,472 INFO L140 encePairwiseOnDemand]: 48/54 looper letters, 42 selfloop transitions, 4 changer transitions 29/80 dead transitions. [2024-10-11 14:30:12,472 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 80 transitions, 387 flow [2024-10-11 14:30:12,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-10-11 14:30:12,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-10-11 14:30:12,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 127 transitions. [2024-10-11 14:30:12,473 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.39197530864197533 [2024-10-11 14:30:12,473 INFO L175 Difference]: Start difference. First operand has 59 places, 53 transitions, 179 flow. Second operand 6 states and 127 transitions. [2024-10-11 14:30:12,473 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 80 transitions, 387 flow [2024-10-11 14:30:12,487 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 80 transitions, 376 flow, removed 3 selfloop flow, removed 2 redundant places. [2024-10-11 14:30:12,488 INFO L231 Difference]: Finished difference. Result has 63 places, 51 transitions, 166 flow [2024-10-11 14:30:12,489 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=162, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=52, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=166, PETRI_PLACES=63, PETRI_TRANSITIONS=51} [2024-10-11 14:30:12,489 INFO L277 CegarLoopForPetriNet]: 53 programPoint places, 10 predicate places. [2024-10-11 14:30:12,489 INFO L471 AbstractCegarLoop]: Abstraction has has 63 places, 51 transitions, 166 flow [2024-10-11 14:30:12,490 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.6) internal successors, (146), 10 states have internal predecessors, (146), 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 14:30:12,490 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 14:30:12,490 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 14:30:12,505 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 14:30:12,694 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 14:30:12,695 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2024-10-11 14:30:12,695 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 14:30:12,695 INFO L85 PathProgramCache]: Analyzing trace with hash 17071568, now seen corresponding path program 2 times [2024-10-11 14:30:12,695 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 14:30:12,696 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1045596652] [2024-10-11 14:30:12,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 14:30:12,696 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 14:30:12,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 14:30:12,821 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-10-11 14:30:12,822 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 14:30:12,822 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1045596652] [2024-10-11 14:30:12,822 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1045596652] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-11 14:30:12,822 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-11 14:30:12,822 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-10-11 14:30:12,823 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1771669332] [2024-10-11 14:30:12,823 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-11 14:30:12,823 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-11 14:30:12,824 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 14:30:12,824 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-11 14:30:12,824 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-10-11 14:30:12,824 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 54 [2024-10-11 14:30:12,825 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 51 transitions, 166 flow. Second operand has 4 states, 4 states have (on average 17.0) internal successors, (68), 4 states have internal predecessors, (68), 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 14:30:12,825 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 14:30:12,825 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 54 [2024-10-11 14:30:12,825 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 14:30:18,264 INFO L124 PetriNetUnfolderBase]: 70326/91180 cut-off events. [2024-10-11 14:30:18,264 INFO L125 PetriNetUnfolderBase]: For 23861/23861 co-relation queries the response was YES. [2024-10-11 14:30:18,560 INFO L83 FinitePrefix]: Finished finitePrefix Result has 213117 conditions, 91180 events. 70326/91180 cut-off events. For 23861/23861 co-relation queries the response was YES. Maximal size of possible extension queue 3021. Compared 533174 event pairs, 19769 based on Foata normal form. 1/79427 useless extension candidates. Maximal degree in co-relation 213106. Up to 31389 conditions per place. [2024-10-11 14:30:18,863 INFO L140 encePairwiseOnDemand]: 48/54 looper letters, 112 selfloop transitions, 8 changer transitions 1/126 dead transitions. [2024-10-11 14:30:18,863 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 126 transitions, 632 flow [2024-10-11 14:30:18,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-11 14:30:18,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-10-11 14:30:18,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 144 transitions. [2024-10-11 14:30:18,864 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6666666666666666 [2024-10-11 14:30:18,864 INFO L175 Difference]: Start difference. First operand has 63 places, 51 transitions, 166 flow. Second operand 4 states and 144 transitions. [2024-10-11 14:30:18,864 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 126 transitions, 632 flow [2024-10-11 14:30:18,877 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 126 transitions, 608 flow, removed 6 selfloop flow, removed 5 redundant places. [2024-10-11 14:30:18,879 INFO L231 Difference]: Finished difference. Result has 62 places, 58 transitions, 226 flow [2024-10-11 14:30:18,880 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=152, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=226, PETRI_PLACES=62, PETRI_TRANSITIONS=58} [2024-10-11 14:30:18,880 INFO L277 CegarLoopForPetriNet]: 53 programPoint places, 9 predicate places. [2024-10-11 14:30:18,881 INFO L471 AbstractCegarLoop]: Abstraction has has 62 places, 58 transitions, 226 flow [2024-10-11 14:30:18,881 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 17.0) internal successors, (68), 4 states have internal predecessors, (68), 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 14:30:18,881 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 14:30:18,881 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 14:30:18,882 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-10-11 14:30:18,882 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2024-10-11 14:30:18,882 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 14:30:18,882 INFO L85 PathProgramCache]: Analyzing trace with hash 1987005594, now seen corresponding path program 1 times [2024-10-11 14:30:18,883 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 14:30:18,883 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [387744547] [2024-10-11 14:30:18,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 14:30:18,883 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 14:30:18,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 14:30:19,085 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-10-11 14:30:19,086 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 14:30:19,086 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [387744547] [2024-10-11 14:30:19,086 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [387744547] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 14:30:19,086 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [515332633] [2024-10-11 14:30:19,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 14:30:19,087 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 14:30:19,087 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 14:30:19,089 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 14:30:19,092 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 14:30:19,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 14:30:19,206 INFO L255 TraceCheckSpWp]: Trace formula consists of 246 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-10-11 14:30:19,208 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 14:30:19,437 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-10-11 14:30:19,438 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 14:30:19,512 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-10-11 14:30:19,512 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [515332633] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-11 14:30:19,513 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-11 14:30:19,513 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 10 [2024-10-11 14:30:19,513 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1342895208] [2024-10-11 14:30:19,513 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-11 14:30:19,514 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-10-11 14:30:19,515 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 14:30:19,516 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-10-11 14:30:19,516 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-10-11 14:30:19,516 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 54 [2024-10-11 14:30:19,518 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 58 transitions, 226 flow. Second operand has 10 states, 10 states have (on average 18.4) internal successors, (184), 10 states have internal predecessors, (184), 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 14:30:19,518 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 14:30:19,518 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 54 [2024-10-11 14:30:19,518 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 14:30:29,421 INFO L124 PetriNetUnfolderBase]: 125786/163023 cut-off events. [2024-10-11 14:30:29,421 INFO L125 PetriNetUnfolderBase]: For 72935/72935 co-relation queries the response was YES. [2024-10-11 14:30:29,907 INFO L83 FinitePrefix]: Finished finitePrefix Result has 397388 conditions, 163023 events. 125786/163023 cut-off events. For 72935/72935 co-relation queries the response was YES. Maximal size of possible extension queue 4823. Compared 983942 event pairs, 8295 based on Foata normal form. 2/141514 useless extension candidates. Maximal degree in co-relation 397377. Up to 80037 conditions per place. [2024-10-11 14:30:30,364 INFO L140 encePairwiseOnDemand]: 46/54 looper letters, 187 selfloop transitions, 22 changer transitions 10/224 dead transitions. [2024-10-11 14:30:30,364 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 224 transitions, 1169 flow [2024-10-11 14:30:30,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-10-11 14:30:30,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-10-11 14:30:30,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 299 transitions. [2024-10-11 14:30:30,367 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5033670033670034 [2024-10-11 14:30:30,367 INFO L175 Difference]: Start difference. First operand has 62 places, 58 transitions, 226 flow. Second operand 11 states and 299 transitions. [2024-10-11 14:30:30,367 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 224 transitions, 1169 flow [2024-10-11 14:30:31,520 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 224 transitions, 1109 flow, removed 30 selfloop flow, removed 2 redundant places. [2024-10-11 14:30:31,523 INFO L231 Difference]: Finished difference. Result has 76 places, 75 transitions, 399 flow [2024-10-11 14:30:31,523 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=206, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=399, PETRI_PLACES=76, PETRI_TRANSITIONS=75} [2024-10-11 14:30:31,524 INFO L277 CegarLoopForPetriNet]: 53 programPoint places, 23 predicate places. [2024-10-11 14:30:31,524 INFO L471 AbstractCegarLoop]: Abstraction has has 76 places, 75 transitions, 399 flow [2024-10-11 14:30:31,524 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 18.4) internal successors, (184), 10 states have internal predecessors, (184), 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 14:30:31,524 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 14:30:31,524 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 14:30:31,541 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-10-11 14:30:31,725 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 14:30:31,725 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2024-10-11 14:30:31,726 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 14:30:31,726 INFO L85 PathProgramCache]: Analyzing trace with hash 1279569974, now seen corresponding path program 1 times [2024-10-11 14:30:31,726 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 14:30:31,726 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [381503969] [2024-10-11 14:30:31,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 14:30:31,726 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 14:30:31,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 14:30:32,937 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 14:30:32,937 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 14:30:32,937 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [381503969] [2024-10-11 14:30:32,937 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [381503969] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 14:30:32,938 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [63976042] [2024-10-11 14:30:32,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 14:30:32,938 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 14:30:32,939 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 14:30:32,940 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 14:30:32,941 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 14:30:33,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 14:30:33,042 INFO L255 TraceCheckSpWp]: Trace formula consists of 261 conjuncts, 24 conjuncts are in the unsatisfiable core [2024-10-11 14:30:33,044 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 14:30:33,295 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-11 14:30:33,296 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 15 [2024-10-11 14:30:33,379 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-11 14:30:33,379 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 14:30:33,548 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-10-11 14:30:33,549 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [63976042] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-11 14:30:33,549 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-11 14:30:33,549 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 7] total 20 [2024-10-11 14:30:33,551 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [854104447] [2024-10-11 14:30:33,551 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-11 14:30:33,552 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-10-11 14:30:33,552 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 14:30:33,552 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-10-11 14:30:33,553 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=326, Unknown=0, NotChecked=0, Total=380 [2024-10-11 14:30:33,553 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 54 [2024-10-11 14:30:33,553 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 75 transitions, 399 flow. Second operand has 20 states, 20 states have (on average 14.4) internal successors, (288), 20 states have internal predecessors, (288), 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 14:30:33,554 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 14:30:33,554 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 54 [2024-10-11 14:30:33,554 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand