./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/weaver/mult-flipped-dist.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version d790fecc Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c403a49-d163-4e0b-bada-2e4588baed87/bin/uautomizer-verify-aQ6SnzHsRB/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c403a49-d163-4e0b-bada-2e4588baed87/bin/uautomizer-verify-aQ6SnzHsRB/plugins/org.eclipse.equinox.launcher_1.6.800.v20240513-1750.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c403a49-d163-4e0b-bada-2e4588baed87/bin/uautomizer-verify-aQ6SnzHsRB/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c403a49-d163-4e0b-bada-2e4588baed87/bin/uautomizer-verify-aQ6SnzHsRB/config/AutomizerReach.xml -i ../../sv-benchmarks/c/weaver/mult-flipped-dist.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c403a49-d163-4e0b-bada-2e4588baed87/bin/uautomizer-verify-aQ6SnzHsRB/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c403a49-d163-4e0b-bada-2e4588baed87/bin/uautomizer-verify-aQ6SnzHsRB --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 7cfd33ca5f647adf12592c5e71401ab9da35a49d8f2ec6d0757ea2cc237974cc --- Real Ultimate output --- This is Ultimate 0.3.0-dev-d790fec [2024-11-28 02:22:51,595 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-28 02:22:51,704 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c403a49-d163-4e0b-bada-2e4588baed87/bin/uautomizer-verify-aQ6SnzHsRB/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-11-28 02:22:51,715 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-28 02:22:51,715 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-28 02:22:51,752 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-28 02:22:51,752 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-28 02:22:51,753 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-28 02:22:51,753 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-28 02:22:51,753 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-28 02:22:51,753 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-28 02:22:51,753 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-28 02:22:51,754 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-28 02:22:51,755 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-28 02:22:51,756 INFO L153 SettingsManager]: * Use SBE=true [2024-11-28 02:22:51,756 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-28 02:22:51,756 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-28 02:22:51,757 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-28 02:22:51,757 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-28 02:22:51,757 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-28 02:22:51,757 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-28 02:22:51,757 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-28 02:22:51,757 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-28 02:22:51,757 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-28 02:22:51,758 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-28 02:22:51,758 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-28 02:22:51,758 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2024-11-28 02:22:51,758 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-28 02:22:51,758 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2024-11-28 02:22:51,758 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-28 02:22:51,758 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-28 02:22:51,758 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-28 02:22:51,758 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-28 02:22:51,758 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-28 02:22:51,759 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-28 02:22:51,759 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-28 02:22:51,759 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-28 02:22:51,759 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-28 02:22:51,759 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-28 02:22:51,759 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-28 02:22:51,759 INFO L153 SettingsManager]: * Compute procedure contracts=false [2024-11-28 02:22:51,759 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-28 02:22:51,759 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-28 02:22:51,759 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-28 02:22:51,760 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-28 02:22:51,760 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-28 02:22:51,761 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-28 02:22:51,761 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-28 02:22:51,761 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC 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 -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c403a49-d163-4e0b-bada-2e4588baed87/bin/uautomizer-verify-aQ6SnzHsRB 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 -> 7cfd33ca5f647adf12592c5e71401ab9da35a49d8f2ec6d0757ea2cc237974cc [2024-11-28 02:22:52,104 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-28 02:22:52,118 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-28 02:22:52,121 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-28 02:22:52,123 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-28 02:22:52,123 INFO L274 PluginConnector]: CDTParser initialized [2024-11-28 02:22:52,125 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c403a49-d163-4e0b-bada-2e4588baed87/bin/uautomizer-verify-aQ6SnzHsRB/../../sv-benchmarks/c/weaver/mult-flipped-dist.wvr.c [2024-11-28 02:22:55,160 INFO L533 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c403a49-d163-4e0b-bada-2e4588baed87/bin/uautomizer-verify-aQ6SnzHsRB/data/80d348a39/9b6dcdb49b424705b96c3c748da3ee7b/FLAG73508154a [2024-11-28 02:22:55,496 INFO L384 CDTParser]: Found 1 translation units. [2024-11-28 02:22:55,498 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c403a49-d163-4e0b-bada-2e4588baed87/sv-benchmarks/c/weaver/mult-flipped-dist.wvr.c [2024-11-28 02:22:55,509 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c403a49-d163-4e0b-bada-2e4588baed87/bin/uautomizer-verify-aQ6SnzHsRB/data/80d348a39/9b6dcdb49b424705b96c3c748da3ee7b/FLAG73508154a [2024-11-28 02:22:55,533 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c403a49-d163-4e0b-bada-2e4588baed87/bin/uautomizer-verify-aQ6SnzHsRB/data/80d348a39/9b6dcdb49b424705b96c3c748da3ee7b [2024-11-28 02:22:55,536 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-28 02:22:55,538 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-28 02:22:55,541 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-28 02:22:55,541 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-28 02:22:55,547 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-28 02:22:55,548 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 02:22:55" (1/1) ... [2024-11-28 02:22:55,552 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3bc4f461 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:22:55, skipping insertion in model container [2024-11-28 02:22:55,552 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 02:22:55" (1/1) ... [2024-11-28 02:22:55,575 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-28 02:22:55,800 WARN L250 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c403a49-d163-4e0b-bada-2e4588baed87/sv-benchmarks/c/weaver/mult-flipped-dist.wvr.c[2174,2187] [2024-11-28 02:22:55,805 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-28 02:22:55,817 INFO L200 MainTranslator]: Completed pre-run [2024-11-28 02:22:55,845 WARN L250 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c403a49-d163-4e0b-bada-2e4588baed87/sv-benchmarks/c/weaver/mult-flipped-dist.wvr.c[2174,2187] [2024-11-28 02:22:55,847 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-28 02:22:55,870 INFO L204 MainTranslator]: Completed translation [2024-11-28 02:22:55,871 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:22:55 WrapperNode [2024-11-28 02:22:55,871 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-28 02:22:55,872 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-28 02:22:55,873 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-28 02:22:55,873 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-28 02:22:55,882 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:22:55" (1/1) ... [2024-11-28 02:22:55,890 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:22:55" (1/1) ... [2024-11-28 02:22:55,907 INFO L138 Inliner]: procedures = 21, calls = 10, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 54 [2024-11-28 02:22:55,907 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-28 02:22:55,909 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-28 02:22:55,909 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-28 02:22:55,910 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-28 02:22:55,919 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:22:55" (1/1) ... [2024-11-28 02:22:55,919 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:22:55" (1/1) ... [2024-11-28 02:22:55,925 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:22:55" (1/1) ... [2024-11-28 02:22:55,946 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]. [2024-11-28 02:22:55,946 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:22:55" (1/1) ... [2024-11-28 02:22:55,946 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:22:55" (1/1) ... [2024-11-28 02:22:55,954 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:22:55" (1/1) ... [2024-11-28 02:22:55,955 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:22:55" (1/1) ... [2024-11-28 02:22:55,964 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:22:55" (1/1) ... [2024-11-28 02:22:55,965 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:22:55" (1/1) ... [2024-11-28 02:22:55,970 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:22:55" (1/1) ... [2024-11-28 02:22:55,972 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-28 02:22:55,973 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-28 02:22:55,973 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-28 02:22:55,973 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-28 02:22:55,977 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:22:55" (1/1) ... [2024-11-28 02:22:55,983 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-28 02:22:55,998 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c403a49-d163-4e0b-bada-2e4588baed87/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 02:22:56,012 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c403a49-d163-4e0b-bada-2e4588baed87/bin/uautomizer-verify-aQ6SnzHsRB/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-11-28 02:22:56,021 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c403a49-d163-4e0b-bada-2e4588baed87/bin/uautomizer-verify-aQ6SnzHsRB/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-11-28 02:22:56,048 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-28 02:22:56,048 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-11-28 02:22:56,049 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-11-28 02:22:56,049 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-11-28 02:22:56,049 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-11-28 02:22:56,049 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2024-11-28 02:22:56,050 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2024-11-28 02:22:56,050 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-28 02:22:56,050 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-28 02:22:56,050 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-28 02:22:56,051 WARN L203 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2024-11-28 02:22:56,172 INFO L234 CfgBuilder]: Building ICFG [2024-11-28 02:22:56,175 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-28 02:22:56,448 INFO L279 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-11-28 02:22:56,448 INFO L283 CfgBuilder]: Performing block encoding [2024-11-28 02:22:56,640 INFO L307 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-28 02:22:56,640 INFO L312 CfgBuilder]: Removed 3 assume(true) statements. [2024-11-28 02:22:56,641 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 02:22:56 BoogieIcfgContainer [2024-11-28 02:22:56,641 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-28 02:22:56,644 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-28 02:22:56,644 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-28 02:22:56,650 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-28 02:22:56,651 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.11 02:22:55" (1/3) ... [2024-11-28 02:22:56,652 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@76b3dc2d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 02:22:56, skipping insertion in model container [2024-11-28 02:22:56,652 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:22:55" (2/3) ... [2024-11-28 02:22:56,652 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@76b3dc2d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 02:22:56, skipping insertion in model container [2024-11-28 02:22:56,653 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 02:22:56" (3/3) ... [2024-11-28 02:22:56,654 INFO L128 eAbstractionObserver]: Analyzing ICFG mult-flipped-dist.wvr.c [2024-11-28 02:22:56,673 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-28 02:22:56,675 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG mult-flipped-dist.wvr.c that has 4 procedures, 23 locations, 1 initial locations, 3 loop locations, and 1 error locations. [2024-11-28 02:22:56,675 INFO L491 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-11-28 02:22:56,788 INFO L143 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2024-11-28 02:22:56,837 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 32 places, 25 transitions, 71 flow [2024-11-28 02:22:56,898 INFO L124 PetriNetUnfolderBase]: 3/22 cut-off events. [2024-11-28 02:22:56,900 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2024-11-28 02:22:56,904 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35 conditions, 22 events. 3/22 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 2. Compared 13 event pairs, 0 based on Foata normal form. 0/18 useless extension candidates. Maximal degree in co-relation 18. Up to 2 conditions per place. [2024-11-28 02:22:56,904 INFO L82 GeneralOperation]: Start removeDead. Operand has 32 places, 25 transitions, 71 flow [2024-11-28 02:22:56,910 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 28 places, 21 transitions, 60 flow [2024-11-28 02:22:56,926 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-28 02:22:56,951 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;@269e9d51, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-28 02:22:56,951 INFO L334 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2024-11-28 02:22:56,977 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-28 02:22:56,978 INFO L124 PetriNetUnfolderBase]: 3/20 cut-off events. [2024-11-28 02:22:56,978 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2024-11-28 02:22:56,978 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 02:22:56,979 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 02:22:56,979 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 1 more)] === [2024-11-28 02:22:56,988 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 02:22:56,989 INFO L85 PathProgramCache]: Analyzing trace with hash 1379150774, now seen corresponding path program 1 times [2024-11-28 02:22:56,998 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 02:22:57,000 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [773225320] [2024-11-28 02:22:57,000 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 02:22:57,001 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 02:22:57,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 02:22:58,004 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 02:22:58,005 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 02:22:58,005 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [773225320] [2024-11-28 02:22:58,006 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [773225320] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 02:22:58,006 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 02:22:58,011 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-28 02:22:58,013 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1899013001] [2024-11-28 02:22:58,014 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 02:22:58,023 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-28 02:22:58,029 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 02:22:58,060 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-28 02:22:58,061 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-28 02:22:58,064 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 25 [2024-11-28 02:22:58,067 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 28 places, 21 transitions, 60 flow. Second operand has 3 states, 3 states have (on average 9.666666666666666) internal successors, (29), 3 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:22:58,068 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 02:22:58,068 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 25 [2024-11-28 02:22:58,069 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 02:22:58,383 INFO L124 PetriNetUnfolderBase]: 386/565 cut-off events. [2024-11-28 02:22:58,387 INFO L125 PetriNetUnfolderBase]: For 56/56 co-relation queries the response was YES. [2024-11-28 02:22:58,390 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1206 conditions, 565 events. 386/565 cut-off events. For 56/56 co-relation queries the response was YES. Maximal size of possible extension queue 33. Compared 1778 event pairs, 124 based on Foata normal form. 1/416 useless extension candidates. Maximal degree in co-relation 1030. Up to 349 conditions per place. [2024-11-28 02:22:58,404 INFO L140 encePairwiseOnDemand]: 20/25 looper letters, 32 selfloop transitions, 4 changer transitions 1/38 dead transitions. [2024-11-28 02:22:58,404 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 30 places, 38 transitions, 183 flow [2024-11-28 02:22:58,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-28 02:22:58,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-28 02:22:58,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 50 transitions. [2024-11-28 02:22:58,430 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6666666666666666 [2024-11-28 02:22:58,433 INFO L175 Difference]: Start difference. First operand has 28 places, 21 transitions, 60 flow. Second operand 3 states and 50 transitions. [2024-11-28 02:22:58,434 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 30 places, 38 transitions, 183 flow [2024-11-28 02:22:58,446 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 24 places, 38 transitions, 161 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-11-28 02:22:58,449 INFO L231 Difference]: Finished difference. Result has 25 places, 24 transitions, 74 flow [2024-11-28 02:22:58,452 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=25, PETRI_DIFFERENCE_MINUEND_FLOW=48, PETRI_DIFFERENCE_MINUEND_PLACES=22, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=21, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=17, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=74, PETRI_PLACES=25, PETRI_TRANSITIONS=24} [2024-11-28 02:22:58,456 INFO L279 CegarLoopForPetriNet]: 28 programPoint places, -3 predicate places. [2024-11-28 02:22:58,456 INFO L471 AbstractCegarLoop]: Abstraction has has 25 places, 24 transitions, 74 flow [2024-11-28 02:22:58,457 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 9.666666666666666) internal successors, (29), 3 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:22:58,457 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 02:22:58,457 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 02:22:58,457 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-28 02:22:58,458 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 1 more)] === [2024-11-28 02:22:58,458 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 02:22:58,459 INFO L85 PathProgramCache]: Analyzing trace with hash -1514960532, now seen corresponding path program 1 times [2024-11-28 02:22:58,459 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 02:22:58,459 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1005337226] [2024-11-28 02:22:58,459 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 02:22:58,459 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 02:22:58,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 02:22:58,650 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 02:22:58,650 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 02:22:58,651 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1005337226] [2024-11-28 02:22:58,651 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1005337226] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 02:22:58,651 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 02:22:58,651 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-28 02:22:58,651 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [691285050] [2024-11-28 02:22:58,652 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 02:22:58,653 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-28 02:22:58,653 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 02:22:58,654 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-28 02:22:58,654 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2024-11-28 02:22:58,654 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 25 [2024-11-28 02:22:58,655 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 25 places, 24 transitions, 74 flow. Second operand has 5 states, 5 states have (on average 7.6) internal successors, (38), 5 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) [2024-11-28 02:22:58,655 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 02:22:58,655 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 25 [2024-11-28 02:22:58,655 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 02:22:59,009 INFO L124 PetriNetUnfolderBase]: 520/743 cut-off events. [2024-11-28 02:22:59,010 INFO L125 PetriNetUnfolderBase]: For 138/138 co-relation queries the response was YES. [2024-11-28 02:22:59,014 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1823 conditions, 743 events. 520/743 cut-off events. For 138/138 co-relation queries the response was YES. Maximal size of possible extension queue 43. Compared 2465 event pairs, 203 based on Foata normal form. 16/759 useless extension candidates. Maximal degree in co-relation 529. Up to 536 conditions per place. [2024-11-28 02:22:59,020 INFO L140 encePairwiseOnDemand]: 18/25 looper letters, 45 selfloop transitions, 12 changer transitions 0/58 dead transitions. [2024-11-28 02:22:59,022 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 29 places, 58 transitions, 287 flow [2024-11-28 02:22:59,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-28 02:22:59,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-28 02:22:59,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 71 transitions. [2024-11-28 02:22:59,026 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.568 [2024-11-28 02:22:59,026 INFO L175 Difference]: Start difference. First operand has 25 places, 24 transitions, 74 flow. Second operand 5 states and 71 transitions. [2024-11-28 02:22:59,026 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 29 places, 58 transitions, 287 flow [2024-11-28 02:22:59,027 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 28 places, 58 transitions, 278 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-28 02:22:59,030 INFO L231 Difference]: Finished difference. Result has 31 places, 34 transitions, 156 flow [2024-11-28 02:22:59,032 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=25, PETRI_DIFFERENCE_MINUEND_FLOW=70, PETRI_DIFFERENCE_MINUEND_PLACES=24, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=24, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=16, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=156, PETRI_PLACES=31, PETRI_TRANSITIONS=34} [2024-11-28 02:22:59,033 INFO L279 CegarLoopForPetriNet]: 28 programPoint places, 3 predicate places. [2024-11-28 02:22:59,033 INFO L471 AbstractCegarLoop]: Abstraction has has 31 places, 34 transitions, 156 flow [2024-11-28 02:22:59,033 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.6) internal successors, (38), 5 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) [2024-11-28 02:22:59,033 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 02:22:59,033 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 02:22:59,033 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-28 02:22:59,034 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 1 more)] === [2024-11-28 02:22:59,034 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 02:22:59,034 INFO L85 PathProgramCache]: Analyzing trace with hash -1346455059, now seen corresponding path program 1 times [2024-11-28 02:22:59,034 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 02:22:59,034 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1481011274] [2024-11-28 02:22:59,035 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 02:22:59,036 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 02:22:59,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 02:22:59,272 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 02:22:59,272 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 02:22:59,273 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1481011274] [2024-11-28 02:22:59,273 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1481011274] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 02:22:59,273 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 02:22:59,274 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-28 02:22:59,274 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1345451093] [2024-11-28 02:22:59,274 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 02:22:59,274 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-28 02:22:59,275 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 02:22:59,275 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-28 02:22:59,275 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-28 02:22:59,275 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 25 [2024-11-28 02:22:59,276 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 31 places, 34 transitions, 156 flow. Second operand has 5 states, 5 states have (on average 7.6) internal successors, (38), 5 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) [2024-11-28 02:22:59,278 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 02:22:59,278 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 25 [2024-11-28 02:22:59,278 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 02:22:59,685 INFO L124 PetriNetUnfolderBase]: 546/820 cut-off events. [2024-11-28 02:22:59,686 INFO L125 PetriNetUnfolderBase]: For 742/742 co-relation queries the response was YES. [2024-11-28 02:22:59,688 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2528 conditions, 820 events. 546/820 cut-off events. For 742/742 co-relation queries the response was YES. Maximal size of possible extension queue 52. Compared 3167 event pairs, 144 based on Foata normal form. 65/885 useless extension candidates. Maximal degree in co-relation 2002. Up to 373 conditions per place. [2024-11-28 02:22:59,694 INFO L140 encePairwiseOnDemand]: 18/25 looper letters, 50 selfloop transitions, 10 changer transitions 5/66 dead transitions. [2024-11-28 02:22:59,695 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 35 places, 66 transitions, 385 flow [2024-11-28 02:22:59,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-28 02:22:59,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-28 02:22:59,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 77 transitions. [2024-11-28 02:22:59,696 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.616 [2024-11-28 02:22:59,696 INFO L175 Difference]: Start difference. First operand has 31 places, 34 transitions, 156 flow. Second operand 5 states and 77 transitions. [2024-11-28 02:22:59,697 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 35 places, 66 transitions, 385 flow [2024-11-28 02:22:59,702 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 35 places, 66 transitions, 373 flow, removed 6 selfloop flow, removed 0 redundant places. [2024-11-28 02:22:59,705 INFO L231 Difference]: Finished difference. Result has 37 places, 36 transitions, 199 flow [2024-11-28 02:22:59,705 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=25, PETRI_DIFFERENCE_MINUEND_FLOW=144, PETRI_DIFFERENCE_MINUEND_PLACES=31, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=199, PETRI_PLACES=37, PETRI_TRANSITIONS=36} [2024-11-28 02:22:59,707 INFO L279 CegarLoopForPetriNet]: 28 programPoint places, 9 predicate places. [2024-11-28 02:22:59,707 INFO L471 AbstractCegarLoop]: Abstraction has has 37 places, 36 transitions, 199 flow [2024-11-28 02:22:59,708 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.6) internal successors, (38), 5 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) [2024-11-28 02:22:59,708 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 02:22:59,708 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 02:22:59,708 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-11-28 02:22:59,708 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 1 more)] === [2024-11-28 02:22:59,710 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 02:22:59,711 INFO L85 PathProgramCache]: Analyzing trace with hash -122259991, now seen corresponding path program 2 times [2024-11-28 02:22:59,711 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 02:22:59,711 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [994390354] [2024-11-28 02:22:59,712 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 02:22:59,712 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 02:22:59,745 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 02:22:59,745 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 02:23:00,013 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 02:23:00,013 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 02:23:00,014 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [994390354] [2024-11-28 02:23:00,014 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [994390354] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 02:23:00,014 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [950327900] [2024-11-28 02:23:00,014 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 02:23:00,014 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:23:00,014 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c403a49-d163-4e0b-bada-2e4588baed87/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 02:23:00,020 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c403a49-d163-4e0b-bada-2e4588baed87/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 02:23:00,024 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c403a49-d163-4e0b-bada-2e4588baed87/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-28 02:23:00,121 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 02:23:00,122 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 02:23:00,124 INFO L256 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-28 02:23:00,130 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 02:23:00,182 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 02:23:00,183 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 02:23:00,266 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 02:23:00,266 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [950327900] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-28 02:23:00,267 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-11-28 02:23:00,267 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6, 5] total 7 [2024-11-28 02:23:00,267 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2038685139] [2024-11-28 02:23:00,268 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 02:23:00,268 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-28 02:23:00,268 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 02:23:00,269 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-28 02:23:00,270 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-11-28 02:23:00,271 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 25 [2024-11-28 02:23:00,271 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 37 places, 36 transitions, 199 flow. Second operand has 4 states, 4 states have (on average 8.5) internal successors, (34), 4 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) [2024-11-28 02:23:00,271 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 02:23:00,271 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 25 [2024-11-28 02:23:00,271 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 02:23:00,600 INFO L124 PetriNetUnfolderBase]: 608/913 cut-off events. [2024-11-28 02:23:00,601 INFO L125 PetriNetUnfolderBase]: For 2099/2099 co-relation queries the response was YES. [2024-11-28 02:23:00,604 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3399 conditions, 913 events. 608/913 cut-off events. For 2099/2099 co-relation queries the response was YES. Maximal size of possible extension queue 60. Compared 3442 event pairs, 156 based on Foata normal form. 31/944 useless extension candidates. Maximal degree in co-relation 2492. Up to 528 conditions per place. [2024-11-28 02:23:00,611 INFO L140 encePairwiseOnDemand]: 20/25 looper letters, 50 selfloop transitions, 7 changer transitions 10/68 dead transitions. [2024-11-28 02:23:00,611 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 40 places, 68 transitions, 501 flow [2024-11-28 02:23:00,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-28 02:23:00,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-28 02:23:00,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 64 transitions. [2024-11-28 02:23:00,613 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.64 [2024-11-28 02:23:00,613 INFO L175 Difference]: Start difference. First operand has 37 places, 36 transitions, 199 flow. Second operand 4 states and 64 transitions. [2024-11-28 02:23:00,613 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 40 places, 68 transitions, 501 flow [2024-11-28 02:23:00,625 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 38 places, 68 transitions, 470 flow, removed 4 selfloop flow, removed 2 redundant places. [2024-11-28 02:23:00,627 INFO L231 Difference]: Finished difference. Result has 40 places, 38 transitions, 223 flow [2024-11-28 02:23:00,627 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=25, PETRI_DIFFERENCE_MINUEND_FLOW=182, PETRI_DIFFERENCE_MINUEND_PLACES=35, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=223, PETRI_PLACES=40, PETRI_TRANSITIONS=38} [2024-11-28 02:23:00,628 INFO L279 CegarLoopForPetriNet]: 28 programPoint places, 12 predicate places. [2024-11-28 02:23:00,629 INFO L471 AbstractCegarLoop]: Abstraction has has 40 places, 38 transitions, 223 flow [2024-11-28 02:23:00,630 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.5) internal successors, (34), 4 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) [2024-11-28 02:23:00,630 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 02:23:00,630 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 02:23:00,643 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c403a49-d163-4e0b-bada-2e4588baed87/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-28 02:23:00,831 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c403a49-d163-4e0b-bada-2e4588baed87/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2024-11-28 02:23:00,832 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 1 more)] === [2024-11-28 02:23:00,832 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 02:23:00,833 INFO L85 PathProgramCache]: Analyzing trace with hash 1023774230, now seen corresponding path program 2 times [2024-11-28 02:23:00,833 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 02:23:00,833 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1696694919] [2024-11-28 02:23:00,833 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 02:23:00,833 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 02:23:00,859 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 02:23:00,859 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 02:23:00,948 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 02:23:00,948 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 02:23:00,948 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1696694919] [2024-11-28 02:23:00,948 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1696694919] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 02:23:00,948 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 02:23:00,948 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-28 02:23:00,949 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [404282154] [2024-11-28 02:23:00,949 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 02:23:00,949 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-28 02:23:00,949 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 02:23:00,950 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-28 02:23:00,950 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-28 02:23:00,950 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 25 [2024-11-28 02:23:00,950 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 40 places, 38 transitions, 223 flow. Second operand has 4 states, 4 states have (on average 8.5) internal successors, (34), 4 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) [2024-11-28 02:23:00,952 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 02:23:00,952 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 25 [2024-11-28 02:23:00,952 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 02:23:01,284 INFO L124 PetriNetUnfolderBase]: 739/1132 cut-off events. [2024-11-28 02:23:01,284 INFO L125 PetriNetUnfolderBase]: For 3257/3257 co-relation queries the response was YES. [2024-11-28 02:23:01,290 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4375 conditions, 1132 events. 739/1132 cut-off events. For 3257/3257 co-relation queries the response was YES. Maximal size of possible extension queue 77. Compared 4717 event pairs, 225 based on Foata normal form. 42/1174 useless extension candidates. Maximal degree in co-relation 3132. Up to 610 conditions per place. [2024-11-28 02:23:01,301 INFO L140 encePairwiseOnDemand]: 20/25 looper letters, 54 selfloop transitions, 10 changer transitions 4/69 dead transitions. [2024-11-28 02:23:01,301 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 69 transitions, 523 flow [2024-11-28 02:23:01,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-28 02:23:01,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-28 02:23:01,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 61 transitions. [2024-11-28 02:23:01,303 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.61 [2024-11-28 02:23:01,303 INFO L175 Difference]: Start difference. First operand has 40 places, 38 transitions, 223 flow. Second operand 4 states and 61 transitions. [2024-11-28 02:23:01,304 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 69 transitions, 523 flow [2024-11-28 02:23:01,316 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 69 transitions, 508 flow, removed 4 selfloop flow, removed 1 redundant places. [2024-11-28 02:23:01,318 INFO L231 Difference]: Finished difference. Result has 44 places, 40 transitions, 279 flow [2024-11-28 02:23:01,318 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=25, PETRI_DIFFERENCE_MINUEND_FLOW=214, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=279, PETRI_PLACES=44, PETRI_TRANSITIONS=40} [2024-11-28 02:23:01,321 INFO L279 CegarLoopForPetriNet]: 28 programPoint places, 16 predicate places. [2024-11-28 02:23:01,321 INFO L471 AbstractCegarLoop]: Abstraction has has 44 places, 40 transitions, 279 flow [2024-11-28 02:23:01,321 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.5) internal successors, (34), 4 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) [2024-11-28 02:23:01,321 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 02:23:01,321 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 02:23:01,321 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-11-28 02:23:01,323 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 1 more)] === [2024-11-28 02:23:01,323 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 02:23:01,323 INFO L85 PathProgramCache]: Analyzing trace with hash -575409379, now seen corresponding path program 3 times [2024-11-28 02:23:01,324 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 02:23:01,324 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [931268724] [2024-11-28 02:23:01,324 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-28 02:23:01,324 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 02:23:01,351 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-28 02:23:01,351 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 02:23:01,463 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 02:23:01,463 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 02:23:01,463 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [931268724] [2024-11-28 02:23:01,463 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [931268724] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 02:23:01,463 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 02:23:01,463 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-28 02:23:01,463 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [257547942] [2024-11-28 02:23:01,463 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 02:23:01,464 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-28 02:23:01,464 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 02:23:01,464 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-28 02:23:01,465 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-28 02:23:01,466 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 25 [2024-11-28 02:23:01,467 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 40 transitions, 279 flow. Second operand has 4 states, 4 states have (on average 8.5) internal successors, (34), 4 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) [2024-11-28 02:23:01,467 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 02:23:01,467 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 25 [2024-11-28 02:23:01,467 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 02:23:01,818 INFO L124 PetriNetUnfolderBase]: 825/1258 cut-off events. [2024-11-28 02:23:01,818 INFO L125 PetriNetUnfolderBase]: For 4784/4784 co-relation queries the response was YES. [2024-11-28 02:23:01,823 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5572 conditions, 1258 events. 825/1258 cut-off events. For 4784/4784 co-relation queries the response was YES. Maximal size of possible extension queue 85. Compared 5195 event pairs, 254 based on Foata normal form. 40/1298 useless extension candidates. Maximal degree in co-relation 4090. Up to 845 conditions per place. [2024-11-28 02:23:01,831 INFO L140 encePairwiseOnDemand]: 20/25 looper letters, 54 selfloop transitions, 8 changer transitions 12/75 dead transitions. [2024-11-28 02:23:01,831 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 75 transitions, 661 flow [2024-11-28 02:23:01,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-28 02:23:01,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-28 02:23:01,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 64 transitions. [2024-11-28 02:23:01,833 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.64 [2024-11-28 02:23:01,833 INFO L175 Difference]: Start difference. First operand has 44 places, 40 transitions, 279 flow. Second operand 4 states and 64 transitions. [2024-11-28 02:23:01,833 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 75 transitions, 661 flow [2024-11-28 02:23:01,844 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 75 transitions, 623 flow, removed 10 selfloop flow, removed 2 redundant places. [2024-11-28 02:23:01,845 INFO L231 Difference]: Finished difference. Result has 47 places, 43 transitions, 314 flow [2024-11-28 02:23:01,846 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=25, PETRI_DIFFERENCE_MINUEND_FLOW=258, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=314, PETRI_PLACES=47, PETRI_TRANSITIONS=43} [2024-11-28 02:23:01,846 INFO L279 CegarLoopForPetriNet]: 28 programPoint places, 19 predicate places. [2024-11-28 02:23:01,846 INFO L471 AbstractCegarLoop]: Abstraction has has 47 places, 43 transitions, 314 flow [2024-11-28 02:23:01,847 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.5) internal successors, (34), 4 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) [2024-11-28 02:23:01,847 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 02:23:01,847 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 02:23:01,847 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-11-28 02:23:01,847 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 1 more)] === [2024-11-28 02:23:01,848 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 02:23:01,848 INFO L85 PathProgramCache]: Analyzing trace with hash 1565501918, now seen corresponding path program 3 times [2024-11-28 02:23:01,848 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 02:23:01,848 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [994434634] [2024-11-28 02:23:01,848 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-28 02:23:01,848 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 02:23:01,866 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-28 02:23:01,866 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 02:23:01,938 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 02:23:01,939 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 02:23:01,939 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [994434634] [2024-11-28 02:23:01,939 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [994434634] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 02:23:01,939 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 02:23:01,939 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-28 02:23:01,939 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [793439437] [2024-11-28 02:23:01,939 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 02:23:01,939 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-28 02:23:01,940 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 02:23:01,940 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-28 02:23:01,940 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-28 02:23:01,940 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 25 [2024-11-28 02:23:01,941 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 43 transitions, 314 flow. Second operand has 4 states, 4 states have (on average 8.5) internal successors, (34), 4 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) [2024-11-28 02:23:01,941 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 02:23:01,941 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 25 [2024-11-28 02:23:01,941 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 02:23:02,372 INFO L124 PetriNetUnfolderBase]: 972/1506 cut-off events. [2024-11-28 02:23:02,372 INFO L125 PetriNetUnfolderBase]: For 6134/6134 co-relation queries the response was YES. [2024-11-28 02:23:02,378 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6559 conditions, 1506 events. 972/1506 cut-off events. For 6134/6134 co-relation queries the response was YES. Maximal size of possible extension queue 100. Compared 6562 event pairs, 372 based on Foata normal form. 44/1550 useless extension candidates. Maximal degree in co-relation 4105. Up to 953 conditions per place. [2024-11-28 02:23:02,387 INFO L140 encePairwiseOnDemand]: 20/25 looper letters, 68 selfloop transitions, 6 changer transitions 13/88 dead transitions. [2024-11-28 02:23:02,387 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 88 transitions, 835 flow [2024-11-28 02:23:02,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-28 02:23:02,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-28 02:23:02,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 58 transitions. [2024-11-28 02:23:02,389 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.58 [2024-11-28 02:23:02,389 INFO L175 Difference]: Start difference. First operand has 47 places, 43 transitions, 314 flow. Second operand 4 states and 58 transitions. [2024-11-28 02:23:02,389 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 88 transitions, 835 flow [2024-11-28 02:23:02,397 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 88 transitions, 826 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-28 02:23:02,399 INFO L231 Difference]: Finished difference. Result has 51 places, 45 transitions, 366 flow [2024-11-28 02:23:02,399 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=25, PETRI_DIFFERENCE_MINUEND_FLOW=309, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=366, PETRI_PLACES=51, PETRI_TRANSITIONS=45} [2024-11-28 02:23:02,400 INFO L279 CegarLoopForPetriNet]: 28 programPoint places, 23 predicate places. [2024-11-28 02:23:02,400 INFO L471 AbstractCegarLoop]: Abstraction has has 51 places, 45 transitions, 366 flow [2024-11-28 02:23:02,400 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.5) internal successors, (34), 4 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) [2024-11-28 02:23:02,400 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 02:23:02,401 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 02:23:02,401 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-11-28 02:23:02,401 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 1 more)] === [2024-11-28 02:23:02,402 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 02:23:02,402 INFO L85 PathProgramCache]: Analyzing trace with hash 179802146, now seen corresponding path program 1 times [2024-11-28 02:23:02,402 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 02:23:02,402 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1637836709] [2024-11-28 02:23:02,402 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 02:23:02,402 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 02:23:02,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 02:23:02,515 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 02:23:02,515 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 02:23:02,516 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1637836709] [2024-11-28 02:23:02,517 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1637836709] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 02:23:02,517 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1341588113] [2024-11-28 02:23:02,517 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 02:23:02,517 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:23:02,517 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c403a49-d163-4e0b-bada-2e4588baed87/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 02:23:02,519 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c403a49-d163-4e0b-bada-2e4588baed87/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 02:23:02,522 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c403a49-d163-4e0b-bada-2e4588baed87/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-28 02:23:02,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 02:23:02,612 INFO L256 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-28 02:23:02,614 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 02:23:02,692 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 02:23:02,696 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 02:23:02,794 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 02:23:02,795 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1341588113] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 02:23:02,795 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 02:23:02,799 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 11 [2024-11-28 02:23:02,799 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [343541944] [2024-11-28 02:23:02,799 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 02:23:02,799 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-11-28 02:23:02,800 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 02:23:02,800 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-11-28 02:23:02,800 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2024-11-28 02:23:02,800 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 25 [2024-11-28 02:23:02,801 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 45 transitions, 366 flow. Second operand has 11 states, 11 states have (on average 6.909090909090909) internal successors, (76), 11 states have internal predecessors, (76), 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) [2024-11-28 02:23:02,801 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 02:23:02,801 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 25 [2024-11-28 02:23:02,801 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 02:23:03,607 INFO L124 PetriNetUnfolderBase]: 1166/1734 cut-off events. [2024-11-28 02:23:03,607 INFO L125 PetriNetUnfolderBase]: For 9426/9426 co-relation queries the response was YES. [2024-11-28 02:23:03,611 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8979 conditions, 1734 events. 1166/1734 cut-off events. For 9426/9426 co-relation queries the response was YES. Maximal size of possible extension queue 122. Compared 7531 event pairs, 275 based on Foata normal form. 117/1851 useless extension candidates. Maximal degree in co-relation 5917. Up to 830 conditions per place. [2024-11-28 02:23:03,622 INFO L140 encePairwiseOnDemand]: 16/25 looper letters, 76 selfloop transitions, 73 changer transitions 23/173 dead transitions. [2024-11-28 02:23:03,623 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 173 transitions, 1872 flow [2024-11-28 02:23:03,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-11-28 02:23:03,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-11-28 02:23:03,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 176 transitions. [2024-11-28 02:23:03,626 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5415384615384615 [2024-11-28 02:23:03,626 INFO L175 Difference]: Start difference. First operand has 51 places, 45 transitions, 366 flow. Second operand 13 states and 176 transitions. [2024-11-28 02:23:03,626 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 173 transitions, 1872 flow [2024-11-28 02:23:03,645 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 173 transitions, 1784 flow, removed 28 selfloop flow, removed 1 redundant places. [2024-11-28 02:23:03,647 INFO L231 Difference]: Finished difference. Result has 70 places, 101 transitions, 1288 flow [2024-11-28 02:23:03,650 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=25, PETRI_DIFFERENCE_MINUEND_FLOW=353, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=1288, PETRI_PLACES=70, PETRI_TRANSITIONS=101} [2024-11-28 02:23:03,651 INFO L279 CegarLoopForPetriNet]: 28 programPoint places, 42 predicate places. [2024-11-28 02:23:03,653 INFO L471 AbstractCegarLoop]: Abstraction has has 70 places, 101 transitions, 1288 flow [2024-11-28 02:23:03,653 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 6.909090909090909) internal successors, (76), 11 states have internal predecessors, (76), 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) [2024-11-28 02:23:03,653 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 02:23:03,653 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 02:23:03,665 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c403a49-d163-4e0b-bada-2e4588baed87/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-11-28 02:23:03,857 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c403a49-d163-4e0b-bada-2e4588baed87/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2024-11-28 02:23:03,858 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-11-28 02:23:03,858 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 02:23:03,858 INFO L85 PathProgramCache]: Analyzing trace with hash 30314864, now seen corresponding path program 4 times [2024-11-28 02:23:03,858 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 02:23:03,859 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1282909274] [2024-11-28 02:23:03,859 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-28 02:23:03,859 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 02:23:03,871 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-28 02:23:03,872 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 02:23:03,951 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 02:23:03,951 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 02:23:03,951 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1282909274] [2024-11-28 02:23:03,951 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1282909274] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 02:23:03,951 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1440451853] [2024-11-28 02:23:03,952 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-28 02:23:03,952 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:23:03,952 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c403a49-d163-4e0b-bada-2e4588baed87/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 02:23:03,954 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c403a49-d163-4e0b-bada-2e4588baed87/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 02:23:03,957 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c403a49-d163-4e0b-bada-2e4588baed87/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-28 02:23:04,023 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-28 02:23:04,023 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 02:23:04,024 INFO L256 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-28 02:23:04,026 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 02:23:04,102 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 02:23:04,103 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 02:23:04,183 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 02:23:04,183 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1440451853] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 02:23:04,183 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 02:23:04,183 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 11 [2024-11-28 02:23:04,184 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1314442483] [2024-11-28 02:23:04,184 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 02:23:04,184 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-11-28 02:23:04,184 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 02:23:04,185 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-11-28 02:23:04,185 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2024-11-28 02:23:04,185 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 25 [2024-11-28 02:23:04,185 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 101 transitions, 1288 flow. Second operand has 11 states, 11 states have (on average 7.090909090909091) internal successors, (78), 11 states have internal predecessors, (78), 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) [2024-11-28 02:23:04,185 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 02:23:04,185 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 25 [2024-11-28 02:23:04,186 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 02:23:04,830 INFO L124 PetriNetUnfolderBase]: 990/1430 cut-off events. [2024-11-28 02:23:04,830 INFO L125 PetriNetUnfolderBase]: For 12069/12069 co-relation queries the response was YES. [2024-11-28 02:23:04,834 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9006 conditions, 1430 events. 990/1430 cut-off events. For 12069/12069 co-relation queries the response was YES. Maximal size of possible extension queue 94. Compared 5594 event pairs, 81 based on Foata normal form. 80/1510 useless extension candidates. Maximal degree in co-relation 8151. Up to 705 conditions per place. [2024-11-28 02:23:04,844 INFO L140 encePairwiseOnDemand]: 17/25 looper letters, 80 selfloop transitions, 94 changer transitions 4/179 dead transitions. [2024-11-28 02:23:04,844 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 179 transitions, 2359 flow [2024-11-28 02:23:04,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-11-28 02:23:04,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-11-28 02:23:04,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 152 transitions. [2024-11-28 02:23:04,846 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5066666666666667 [2024-11-28 02:23:04,846 INFO L175 Difference]: Start difference. First operand has 70 places, 101 transitions, 1288 flow. Second operand 12 states and 152 transitions. [2024-11-28 02:23:04,846 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 179 transitions, 2359 flow [2024-11-28 02:23:04,894 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 179 transitions, 1934 flow, removed 175 selfloop flow, removed 2 redundant places. [2024-11-28 02:23:04,898 INFO L231 Difference]: Finished difference. Result has 82 places, 126 transitions, 1584 flow [2024-11-28 02:23:04,898 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=25, PETRI_DIFFERENCE_MINUEND_FLOW=1001, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=101, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=67, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=1584, PETRI_PLACES=82, PETRI_TRANSITIONS=126} [2024-11-28 02:23:04,899 INFO L279 CegarLoopForPetriNet]: 28 programPoint places, 54 predicate places. [2024-11-28 02:23:04,899 INFO L471 AbstractCegarLoop]: Abstraction has has 82 places, 126 transitions, 1584 flow [2024-11-28 02:23:04,899 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.090909090909091) internal successors, (78), 11 states have internal predecessors, (78), 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) [2024-11-28 02:23:04,899 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 02:23:04,899 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 02:23:04,909 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c403a49-d163-4e0b-bada-2e4588baed87/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-11-28 02:23:05,100 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c403a49-d163-4e0b-bada-2e4588baed87/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:23:05,101 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-11-28 02:23:05,102 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 02:23:05,102 INFO L85 PathProgramCache]: Analyzing trace with hash 1951262509, now seen corresponding path program 1 times [2024-11-28 02:23:05,102 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 02:23:05,102 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2121069078] [2024-11-28 02:23:05,102 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 02:23:05,102 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 02:23:05,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 02:23:05,416 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 02:23:05,416 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 02:23:05,416 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2121069078] [2024-11-28 02:23:05,416 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2121069078] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 02:23:05,416 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [576141230] [2024-11-28 02:23:05,416 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 02:23:05,417 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:23:05,417 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c403a49-d163-4e0b-bada-2e4588baed87/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 02:23:05,419 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c403a49-d163-4e0b-bada-2e4588baed87/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 02:23:05,421 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c403a49-d163-4e0b-bada-2e4588baed87/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-28 02:23:05,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 02:23:05,503 INFO L256 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 13 conjuncts are in the unsatisfiable core [2024-11-28 02:23:05,505 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 02:23:05,717 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 02:23:05,717 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 02:23:06,512 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 02:23:06,512 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [576141230] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 02:23:06,512 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 02:23:06,512 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 4] total 12 [2024-11-28 02:23:06,513 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1998576021] [2024-11-28 02:23:06,513 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 02:23:06,513 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-11-28 02:23:06,513 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 02:23:06,514 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-11-28 02:23:06,514 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2024-11-28 02:23:06,514 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 25 [2024-11-28 02:23:06,514 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 126 transitions, 1584 flow. Second operand has 13 states, 13 states have (on average 8.615384615384615) internal successors, (112), 13 states have internal predecessors, (112), 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) [2024-11-28 02:23:06,515 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 02:23:06,515 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 25 [2024-11-28 02:23:06,515 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 02:23:07,238 INFO L124 PetriNetUnfolderBase]: 1411/2031 cut-off events. [2024-11-28 02:23:07,238 INFO L125 PetriNetUnfolderBase]: For 13514/13514 co-relation queries the response was YES. [2024-11-28 02:23:07,246 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11713 conditions, 2031 events. 1411/2031 cut-off events. For 13514/13514 co-relation queries the response was YES. Maximal size of possible extension queue 114. Compared 8043 event pairs, 158 based on Foata normal form. 2/2033 useless extension candidates. Maximal degree in co-relation 10974. Up to 1460 conditions per place. [2024-11-28 02:23:07,261 INFO L140 encePairwiseOnDemand]: 20/25 looper letters, 152 selfloop transitions, 58 changer transitions 2/213 dead transitions. [2024-11-28 02:23:07,261 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 213 transitions, 2668 flow [2024-11-28 02:23:07,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-28 02:23:07,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-11-28 02:23:07,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 134 transitions. [2024-11-28 02:23:07,263 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5955555555555555 [2024-11-28 02:23:07,263 INFO L175 Difference]: Start difference. First operand has 82 places, 126 transitions, 1584 flow. Second operand 9 states and 134 transitions. [2024-11-28 02:23:07,263 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 213 transitions, 2668 flow [2024-11-28 02:23:07,337 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 213 transitions, 2334 flow, removed 36 selfloop flow, removed 10 redundant places. [2024-11-28 02:23:07,341 INFO L231 Difference]: Finished difference. Result has 81 places, 158 transitions, 1872 flow [2024-11-28 02:23:07,341 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=25, PETRI_DIFFERENCE_MINUEND_FLOW=1287, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=126, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=82, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1872, PETRI_PLACES=81, PETRI_TRANSITIONS=158} [2024-11-28 02:23:07,342 INFO L279 CegarLoopForPetriNet]: 28 programPoint places, 53 predicate places. [2024-11-28 02:23:07,342 INFO L471 AbstractCegarLoop]: Abstraction has has 81 places, 158 transitions, 1872 flow [2024-11-28 02:23:07,343 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 8.615384615384615) internal successors, (112), 13 states have internal predecessors, (112), 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) [2024-11-28 02:23:07,343 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 02:23:07,343 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 02:23:07,354 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c403a49-d163-4e0b-bada-2e4588baed87/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2024-11-28 02:23:07,547 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c403a49-d163-4e0b-bada-2e4588baed87/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:23:07,547 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-11-28 02:23:07,548 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 02:23:07,548 INFO L85 PathProgramCache]: Analyzing trace with hash -1488471581, now seen corresponding path program 2 times [2024-11-28 02:23:07,548 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 02:23:07,548 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [926059620] [2024-11-28 02:23:07,548 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 02:23:07,548 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 02:23:07,565 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 02:23:07,565 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 02:23:07,877 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 02:23:07,877 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 02:23:07,877 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [926059620] [2024-11-28 02:23:07,877 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [926059620] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 02:23:07,877 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1178908669] [2024-11-28 02:23:07,877 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 02:23:07,878 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:23:07,878 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c403a49-d163-4e0b-bada-2e4588baed87/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 02:23:07,881 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c403a49-d163-4e0b-bada-2e4588baed87/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 02:23:07,884 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c403a49-d163-4e0b-bada-2e4588baed87/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-28 02:23:07,963 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 02:23:07,964 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 02:23:07,965 INFO L256 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 13 conjuncts are in the unsatisfiable core [2024-11-28 02:23:07,967 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 02:23:08,151 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 02:23:08,151 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 02:23:08,959 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 02:23:08,960 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1178908669] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 02:23:08,960 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 02:23:08,960 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 4] total 12 [2024-11-28 02:23:08,960 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1416926738] [2024-11-28 02:23:08,960 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 02:23:08,961 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-11-28 02:23:08,961 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 02:23:08,961 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-11-28 02:23:08,962 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2024-11-28 02:23:08,962 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 25 [2024-11-28 02:23:08,962 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 158 transitions, 1872 flow. Second operand has 13 states, 13 states have (on average 8.615384615384615) internal successors, (112), 13 states have internal predecessors, (112), 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) [2024-11-28 02:23:08,962 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 02:23:08,962 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 25 [2024-11-28 02:23:08,963 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 02:23:09,682 INFO L124 PetriNetUnfolderBase]: 1707/2463 cut-off events. [2024-11-28 02:23:09,682 INFO L125 PetriNetUnfolderBase]: For 15698/15698 co-relation queries the response was YES. [2024-11-28 02:23:09,689 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14183 conditions, 2463 events. 1707/2463 cut-off events. For 15698/15698 co-relation queries the response was YES. Maximal size of possible extension queue 128. Compared 10079 event pairs, 279 based on Foata normal form. 2/2465 useless extension candidates. Maximal degree in co-relation 13608. Up to 1895 conditions per place. [2024-11-28 02:23:09,708 INFO L140 encePairwiseOnDemand]: 20/25 looper letters, 165 selfloop transitions, 61 changer transitions 2/229 dead transitions. [2024-11-28 02:23:09,710 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 229 transitions, 2829 flow [2024-11-28 02:23:09,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-28 02:23:09,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-11-28 02:23:09,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 131 transitions. [2024-11-28 02:23:09,711 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5822222222222222 [2024-11-28 02:23:09,711 INFO L175 Difference]: Start difference. First operand has 81 places, 158 transitions, 1872 flow. Second operand 9 states and 131 transitions. [2024-11-28 02:23:09,712 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 229 transitions, 2829 flow [2024-11-28 02:23:09,781 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 229 transitions, 2645 flow, removed 79 selfloop flow, removed 1 redundant places. [2024-11-28 02:23:09,785 INFO L231 Difference]: Finished difference. Result has 91 places, 177 transitions, 2129 flow [2024-11-28 02:23:09,786 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=25, PETRI_DIFFERENCE_MINUEND_FLOW=1688, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=158, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=108, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2129, PETRI_PLACES=91, PETRI_TRANSITIONS=177} [2024-11-28 02:23:09,787 INFO L279 CegarLoopForPetriNet]: 28 programPoint places, 63 predicate places. [2024-11-28 02:23:09,787 INFO L471 AbstractCegarLoop]: Abstraction has has 91 places, 177 transitions, 2129 flow [2024-11-28 02:23:09,788 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 8.615384615384615) internal successors, (112), 13 states have internal predecessors, (112), 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) [2024-11-28 02:23:09,788 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 02:23:09,788 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 02:23:09,800 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c403a49-d163-4e0b-bada-2e4588baed87/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-11-28 02:23:09,992 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c403a49-d163-4e0b-bada-2e4588baed87/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:23:09,992 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-11-28 02:23:09,993 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 02:23:09,993 INFO L85 PathProgramCache]: Analyzing trace with hash 79183935, now seen corresponding path program 3 times [2024-11-28 02:23:09,994 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 02:23:09,994 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [556854630] [2024-11-28 02:23:09,994 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-28 02:23:09,994 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 02:23:10,015 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-28 02:23:10,015 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 02:23:10,298 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 02:23:10,298 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 02:23:10,299 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [556854630] [2024-11-28 02:23:10,299 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [556854630] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 02:23:10,299 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [472383234] [2024-11-28 02:23:10,299 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-28 02:23:10,299 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:23:10,299 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c403a49-d163-4e0b-bada-2e4588baed87/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 02:23:10,302 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c403a49-d163-4e0b-bada-2e4588baed87/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 02:23:10,306 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c403a49-d163-4e0b-bada-2e4588baed87/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-28 02:23:10,383 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-28 02:23:10,383 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 02:23:10,385 INFO L256 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 13 conjuncts are in the unsatisfiable core [2024-11-28 02:23:10,386 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 02:23:10,537 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 02:23:10,538 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 02:23:11,526 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 02:23:11,526 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [472383234] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 02:23:11,527 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 02:23:11,527 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 4] total 12 [2024-11-28 02:23:11,527 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1249736671] [2024-11-28 02:23:11,527 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 02:23:11,528 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-11-28 02:23:11,528 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 02:23:11,528 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-11-28 02:23:11,529 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2024-11-28 02:23:11,529 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 25 [2024-11-28 02:23:11,529 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 91 places, 177 transitions, 2129 flow. Second operand has 13 states, 13 states have (on average 8.615384615384615) internal successors, (112), 13 states have internal predecessors, (112), 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) [2024-11-28 02:23:11,530 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 02:23:11,530 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 25 [2024-11-28 02:23:11,530 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 02:23:12,376 INFO L124 PetriNetUnfolderBase]: 2132/3081 cut-off events. [2024-11-28 02:23:12,376 INFO L125 PetriNetUnfolderBase]: For 21228/21228 co-relation queries the response was YES. [2024-11-28 02:23:12,388 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17810 conditions, 3081 events. 2132/3081 cut-off events. For 21228/21228 co-relation queries the response was YES. Maximal size of possible extension queue 152. Compared 13159 event pairs, 430 based on Foata normal form. 2/3083 useless extension candidates. Maximal degree in co-relation 17381. Up to 2537 conditions per place. [2024-11-28 02:23:12,406 INFO L140 encePairwiseOnDemand]: 20/25 looper letters, 200 selfloop transitions, 59 changer transitions 2/262 dead transitions. [2024-11-28 02:23:12,406 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 99 places, 262 transitions, 3388 flow [2024-11-28 02:23:12,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-28 02:23:12,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-11-28 02:23:12,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 131 transitions. [2024-11-28 02:23:12,408 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5822222222222222 [2024-11-28 02:23:12,408 INFO L175 Difference]: Start difference. First operand has 91 places, 177 transitions, 2129 flow. Second operand 9 states and 131 transitions. [2024-11-28 02:23:12,408 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 99 places, 262 transitions, 3388 flow [2024-11-28 02:23:12,512 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 97 places, 262 transitions, 3179 flow, removed 79 selfloop flow, removed 2 redundant places. [2024-11-28 02:23:12,520 INFO L231 Difference]: Finished difference. Result has 100 places, 210 transitions, 2615 flow [2024-11-28 02:23:12,520 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=25, PETRI_DIFFERENCE_MINUEND_FLOW=1920, PETRI_DIFFERENCE_MINUEND_PLACES=89, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=177, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=132, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2615, PETRI_PLACES=100, PETRI_TRANSITIONS=210} [2024-11-28 02:23:12,521 INFO L279 CegarLoopForPetriNet]: 28 programPoint places, 72 predicate places. [2024-11-28 02:23:12,522 INFO L471 AbstractCegarLoop]: Abstraction has has 100 places, 210 transitions, 2615 flow [2024-11-28 02:23:12,523 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 8.615384615384615) internal successors, (112), 13 states have internal predecessors, (112), 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) [2024-11-28 02:23:12,523 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 02:23:12,523 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 02:23:12,544 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c403a49-d163-4e0b-bada-2e4588baed87/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-11-28 02:23:12,723 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c403a49-d163-4e0b-bada-2e4588baed87/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2024-11-28 02:23:12,724 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-11-28 02:23:12,725 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 02:23:12,726 INFO L85 PathProgramCache]: Analyzing trace with hash -1617389505, now seen corresponding path program 4 times [2024-11-28 02:23:12,727 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 02:23:12,727 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [138031874] [2024-11-28 02:23:12,727 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-28 02:23:12,727 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 02:23:12,741 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-28 02:23:12,741 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 02:23:13,016 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 02:23:13,016 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 02:23:13,016 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [138031874] [2024-11-28 02:23:13,016 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [138031874] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 02:23:13,016 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [308763097] [2024-11-28 02:23:13,016 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-28 02:23:13,017 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:23:13,017 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c403a49-d163-4e0b-bada-2e4588baed87/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 02:23:13,019 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c403a49-d163-4e0b-bada-2e4588baed87/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 02:23:13,022 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c403a49-d163-4e0b-bada-2e4588baed87/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-28 02:23:13,105 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-28 02:23:13,106 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 02:23:13,107 INFO L256 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 13 conjuncts are in the unsatisfiable core [2024-11-28 02:23:13,108 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 02:23:13,283 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 02:23:13,283 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 02:23:14,088 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 02:23:14,088 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [308763097] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 02:23:14,088 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 02:23:14,089 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 4] total 12 [2024-11-28 02:23:14,089 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [938416491] [2024-11-28 02:23:14,089 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 02:23:14,089 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-11-28 02:23:14,090 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 02:23:14,090 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-11-28 02:23:14,090 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2024-11-28 02:23:14,090 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 25 [2024-11-28 02:23:14,091 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 100 places, 210 transitions, 2615 flow. Second operand has 13 states, 13 states have (on average 8.615384615384615) internal successors, (112), 13 states have internal predecessors, (112), 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) [2024-11-28 02:23:14,091 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 02:23:14,091 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 25 [2024-11-28 02:23:14,091 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 02:23:14,889 INFO L124 PetriNetUnfolderBase]: 2412/3489 cut-off events. [2024-11-28 02:23:14,889 INFO L125 PetriNetUnfolderBase]: For 25108/25108 co-relation queries the response was YES. [2024-11-28 02:23:14,904 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20360 conditions, 3489 events. 2412/3489 cut-off events. For 25108/25108 co-relation queries the response was YES. Maximal size of possible extension queue 161. Compared 15317 event pairs, 544 based on Foata normal form. 2/3491 useless extension candidates. Maximal degree in co-relation 19900. Up to 2968 conditions per place. [2024-11-28 02:23:14,924 INFO L140 encePairwiseOnDemand]: 20/25 looper letters, 212 selfloop transitions, 62 changer transitions 2/277 dead transitions. [2024-11-28 02:23:14,924 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 108 places, 277 transitions, 3742 flow [2024-11-28 02:23:14,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-28 02:23:14,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-11-28 02:23:14,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 127 transitions. [2024-11-28 02:23:14,926 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5644444444444444 [2024-11-28 02:23:14,926 INFO L175 Difference]: Start difference. First operand has 100 places, 210 transitions, 2615 flow. Second operand 9 states and 127 transitions. [2024-11-28 02:23:14,926 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 108 places, 277 transitions, 3742 flow [2024-11-28 02:23:15,034 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 107 places, 277 transitions, 3484 flow, removed 116 selfloop flow, removed 1 redundant places. [2024-11-28 02:23:15,039 INFO L231 Difference]: Finished difference. Result has 110 places, 229 transitions, 2865 flow [2024-11-28 02:23:15,039 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=25, PETRI_DIFFERENCE_MINUEND_FLOW=2357, PETRI_DIFFERENCE_MINUEND_PLACES=99, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=210, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=159, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2865, PETRI_PLACES=110, PETRI_TRANSITIONS=229} [2024-11-28 02:23:15,040 INFO L279 CegarLoopForPetriNet]: 28 programPoint places, 82 predicate places. [2024-11-28 02:23:15,040 INFO L471 AbstractCegarLoop]: Abstraction has has 110 places, 229 transitions, 2865 flow [2024-11-28 02:23:15,040 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 8.615384615384615) internal successors, (112), 13 states have internal predecessors, (112), 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) [2024-11-28 02:23:15,040 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 02:23:15,040 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 02:23:15,050 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c403a49-d163-4e0b-bada-2e4588baed87/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2024-11-28 02:23:15,244 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c403a49-d163-4e0b-bada-2e4588baed87/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2024-11-28 02:23:15,245 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-11-28 02:23:15,246 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 02:23:15,246 INFO L85 PathProgramCache]: Analyzing trace with hash 340568635, now seen corresponding path program 5 times [2024-11-28 02:23:15,246 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 02:23:15,246 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [679754802] [2024-11-28 02:23:15,246 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-28 02:23:15,246 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 02:23:15,257 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 02:23:15,258 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 02:23:15,436 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 02:23:15,437 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 02:23:15,437 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [679754802] [2024-11-28 02:23:15,437 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [679754802] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 02:23:15,437 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2018898664] [2024-11-28 02:23:15,437 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-28 02:23:15,437 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:23:15,437 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c403a49-d163-4e0b-bada-2e4588baed87/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 02:23:15,439 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c403a49-d163-4e0b-bada-2e4588baed87/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 02:23:15,442 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c403a49-d163-4e0b-bada-2e4588baed87/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-11-28 02:23:15,510 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 02:23:15,510 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 02:23:15,511 INFO L256 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 13 conjuncts are in the unsatisfiable core [2024-11-28 02:23:15,512 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 02:23:15,641 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 02:23:15,642 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 02:23:17,499 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 02:23:17,499 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2018898664] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 02:23:17,499 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 02:23:17,500 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 4] total 11 [2024-11-28 02:23:17,500 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1299910697] [2024-11-28 02:23:17,500 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 02:23:17,500 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-11-28 02:23:17,500 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 02:23:17,501 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-11-28 02:23:17,501 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2024-11-28 02:23:17,501 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 25 [2024-11-28 02:23:17,501 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 110 places, 229 transitions, 2865 flow. Second operand has 12 states, 12 states have (on average 9.0) internal successors, (108), 12 states have internal predecessors, (108), 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) [2024-11-28 02:23:17,502 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 02:23:17,502 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 25 [2024-11-28 02:23:17,502 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 02:23:18,391 INFO L124 PetriNetUnfolderBase]: 2768/4002 cut-off events. [2024-11-28 02:23:18,391 INFO L125 PetriNetUnfolderBase]: For 30115/30115 co-relation queries the response was YES. [2024-11-28 02:23:18,414 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23311 conditions, 4002 events. 2768/4002 cut-off events. For 30115/30115 co-relation queries the response was YES. Maximal size of possible extension queue 186. Compared 18123 event pairs, 672 based on Foata normal form. 1/4003 useless extension candidates. Maximal degree in co-relation 22807. Up to 3541 conditions per place. [2024-11-28 02:23:18,436 INFO L140 encePairwiseOnDemand]: 20/25 looper letters, 242 selfloop transitions, 61 changer transitions 1/305 dead transitions. [2024-11-28 02:23:18,436 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 117 places, 305 transitions, 4266 flow [2024-11-28 02:23:18,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-28 02:23:18,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-11-28 02:23:18,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 111 transitions. [2024-11-28 02:23:18,438 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.555 [2024-11-28 02:23:18,438 INFO L175 Difference]: Start difference. First operand has 110 places, 229 transitions, 2865 flow. Second operand 8 states and 111 transitions. [2024-11-28 02:23:18,438 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 117 places, 305 transitions, 4266 flow [2024-11-28 02:23:18,571 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 115 places, 305 transitions, 4004 flow, removed 105 selfloop flow, removed 2 redundant places. [2024-11-28 02:23:18,577 INFO L231 Difference]: Finished difference. Result has 118 places, 264 transitions, 3383 flow [2024-11-28 02:23:18,577 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=25, PETRI_DIFFERENCE_MINUEND_FLOW=2603, PETRI_DIFFERENCE_MINUEND_PLACES=108, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=229, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=180, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3383, PETRI_PLACES=118, PETRI_TRANSITIONS=264} [2024-11-28 02:23:18,578 INFO L279 CegarLoopForPetriNet]: 28 programPoint places, 90 predicate places. [2024-11-28 02:23:18,578 INFO L471 AbstractCegarLoop]: Abstraction has has 118 places, 264 transitions, 3383 flow [2024-11-28 02:23:18,578 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 9.0) internal successors, (108), 12 states have internal predecessors, (108), 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) [2024-11-28 02:23:18,578 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 02:23:18,579 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 02:23:18,590 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c403a49-d163-4e0b-bada-2e4588baed87/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2024-11-28 02:23:18,783 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c403a49-d163-4e0b-bada-2e4588baed87/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2024-11-28 02:23:18,783 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-11-28 02:23:18,784 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 02:23:18,784 INFO L85 PathProgramCache]: Analyzing trace with hash 1693205051, now seen corresponding path program 6 times [2024-11-28 02:23:18,784 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 02:23:18,785 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [730449717] [2024-11-28 02:23:18,785 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-28 02:23:18,785 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 02:23:18,799 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2024-11-28 02:23:18,799 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 02:23:19,063 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 02:23:19,063 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 02:23:19,063 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [730449717] [2024-11-28 02:23:19,063 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [730449717] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 02:23:19,063 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [683747360] [2024-11-28 02:23:19,063 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-28 02:23:19,063 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:23:19,063 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c403a49-d163-4e0b-bada-2e4588baed87/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 02:23:19,070 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c403a49-d163-4e0b-bada-2e4588baed87/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 02:23:19,071 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c403a49-d163-4e0b-bada-2e4588baed87/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-11-28 02:23:19,158 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2024-11-28 02:23:19,158 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 02:23:19,162 INFO L256 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 13 conjuncts are in the unsatisfiable core [2024-11-28 02:23:19,164 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 02:23:19,335 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 02:23:19,335 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 02:23:21,860 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 02:23:21,861 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [683747360] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 02:23:21,861 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 02:23:21,861 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 4] total 12 [2024-11-28 02:23:21,861 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [760846602] [2024-11-28 02:23:21,861 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 02:23:21,861 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-11-28 02:23:21,862 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 02:23:21,862 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-11-28 02:23:21,862 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2024-11-28 02:23:21,863 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 25 [2024-11-28 02:23:21,863 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 118 places, 264 transitions, 3383 flow. Second operand has 13 states, 13 states have (on average 8.615384615384615) internal successors, (112), 13 states have internal predecessors, (112), 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) [2024-11-28 02:23:21,863 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 02:23:21,863 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 25 [2024-11-28 02:23:21,863 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 02:23:22,517 INFO L124 PetriNetUnfolderBase]: 2998/4337 cut-off events. [2024-11-28 02:23:22,517 INFO L125 PetriNetUnfolderBase]: For 33715/33715 co-relation queries the response was YES. [2024-11-28 02:23:22,528 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25497 conditions, 4337 events. 2998/4337 cut-off events. For 33715/33715 co-relation queries the response was YES. Maximal size of possible extension queue 198. Compared 19932 event pairs, 773 based on Foata normal form. 1/4338 useless extension candidates. Maximal degree in co-relation 24972. Up to 3894 conditions per place. [2024-11-28 02:23:22,549 INFO L140 encePairwiseOnDemand]: 20/25 looper letters, 257 selfloop transitions, 61 changer transitions 1/320 dead transitions. [2024-11-28 02:23:22,550 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 125 places, 320 transitions, 4597 flow [2024-11-28 02:23:22,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-28 02:23:22,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-11-28 02:23:22,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 110 transitions. [2024-11-28 02:23:22,551 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.55 [2024-11-28 02:23:22,551 INFO L175 Difference]: Start difference. First operand has 118 places, 264 transitions, 3383 flow. Second operand 8 states and 110 transitions. [2024-11-28 02:23:22,551 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 125 places, 320 transitions, 4597 flow [2024-11-28 02:23:22,699 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 124 places, 320 transitions, 4291 flow, removed 140 selfloop flow, removed 1 redundant places. [2024-11-28 02:23:22,705 INFO L231 Difference]: Finished difference. Result has 126 places, 280 transitions, 3579 flow [2024-11-28 02:23:22,706 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=25, PETRI_DIFFERENCE_MINUEND_FLOW=3077, PETRI_DIFFERENCE_MINUEND_PLACES=117, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=264, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=211, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3579, PETRI_PLACES=126, PETRI_TRANSITIONS=280} [2024-11-28 02:23:22,706 INFO L279 CegarLoopForPetriNet]: 28 programPoint places, 98 predicate places. [2024-11-28 02:23:22,706 INFO L471 AbstractCegarLoop]: Abstraction has has 126 places, 280 transitions, 3579 flow [2024-11-28 02:23:22,706 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 8.615384615384615) internal successors, (112), 13 states have internal predecessors, (112), 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) [2024-11-28 02:23:22,707 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 02:23:22,707 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 02:23:22,717 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c403a49-d163-4e0b-bada-2e4588baed87/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2024-11-28 02:23:22,911 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c403a49-d163-4e0b-bada-2e4588baed87/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2024-11-28 02:23:22,911 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-11-28 02:23:22,912 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 02:23:22,912 INFO L85 PathProgramCache]: Analyzing trace with hash -1228997183, now seen corresponding path program 7 times [2024-11-28 02:23:22,912 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 02:23:22,912 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [91783925] [2024-11-28 02:23:22,912 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-28 02:23:22,913 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 02:23:22,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 02:23:23,103 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-28 02:23:23,103 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 02:23:23,103 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [91783925] [2024-11-28 02:23:23,103 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [91783925] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 02:23:23,104 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1538687528] [2024-11-28 02:23:23,104 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-28 02:23:23,104 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:23:23,104 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c403a49-d163-4e0b-bada-2e4588baed87/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 02:23:23,106 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c403a49-d163-4e0b-bada-2e4588baed87/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 02:23:23,110 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c403a49-d163-4e0b-bada-2e4588baed87/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-11-28 02:23:23,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 02:23:23,175 INFO L256 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-11-28 02:23:23,176 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 02:23:23,224 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-28 02:23:23,224 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 02:23:23,311 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-28 02:23:23,311 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1538687528] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 02:23:23,311 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 02:23:23,312 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 12 [2024-11-28 02:23:23,312 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [455415763] [2024-11-28 02:23:23,312 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 02:23:23,312 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-11-28 02:23:23,312 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 02:23:23,312 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-11-28 02:23:23,313 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2024-11-28 02:23:23,313 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 25 [2024-11-28 02:23:23,313 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 126 places, 280 transitions, 3579 flow. Second operand has 12 states, 12 states have (on average 6.833333333333333) internal successors, (82), 12 states have internal predecessors, (82), 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) [2024-11-28 02:23:23,313 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 02:23:23,313 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 25 [2024-11-28 02:23:23,313 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 02:23:24,569 INFO L124 PetriNetUnfolderBase]: 4613/6557 cut-off events. [2024-11-28 02:23:24,569 INFO L125 PetriNetUnfolderBase]: For 56846/56846 co-relation queries the response was YES. [2024-11-28 02:23:24,591 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38014 conditions, 6557 events. 4613/6557 cut-off events. For 56846/56846 co-relation queries the response was YES. Maximal size of possible extension queue 259. Compared 31101 event pairs, 430 based on Foata normal form. 41/6598 useless extension candidates. Maximal degree in co-relation 36952. Up to 2111 conditions per place. [2024-11-28 02:23:24,623 INFO L140 encePairwiseOnDemand]: 19/25 looper letters, 515 selfloop transitions, 134 changer transitions 0/650 dead transitions. [2024-11-28 02:23:24,623 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 138 places, 650 transitions, 9271 flow [2024-11-28 02:23:24,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-11-28 02:23:24,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-11-28 02:23:24,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 191 transitions. [2024-11-28 02:23:24,625 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5876923076923077 [2024-11-28 02:23:24,625 INFO L175 Difference]: Start difference. First operand has 126 places, 280 transitions, 3579 flow. Second operand 13 states and 191 transitions. [2024-11-28 02:23:24,625 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 138 places, 650 transitions, 9271 flow [2024-11-28 02:23:24,958 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 136 places, 650 transitions, 8404 flow, removed 407 selfloop flow, removed 2 redundant places. [2024-11-28 02:23:24,964 INFO L231 Difference]: Finished difference. Result has 143 places, 347 transitions, 4492 flow [2024-11-28 02:23:24,964 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=25, PETRI_DIFFERENCE_MINUEND_FLOW=3299, PETRI_DIFFERENCE_MINUEND_PLACES=124, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=280, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=85, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=180, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=4492, PETRI_PLACES=143, PETRI_TRANSITIONS=347} [2024-11-28 02:23:24,965 INFO L279 CegarLoopForPetriNet]: 28 programPoint places, 115 predicate places. [2024-11-28 02:23:24,965 INFO L471 AbstractCegarLoop]: Abstraction has has 143 places, 347 transitions, 4492 flow [2024-11-28 02:23:24,965 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 6.833333333333333) internal successors, (82), 12 states have internal predecessors, (82), 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) [2024-11-28 02:23:24,965 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 02:23:24,965 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 02:23:24,974 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c403a49-d163-4e0b-bada-2e4588baed87/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2024-11-28 02:23:25,166 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c403a49-d163-4e0b-bada-2e4588baed87/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2024-11-28 02:23:25,166 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-11-28 02:23:25,166 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 02:23:25,167 INFO L85 PathProgramCache]: Analyzing trace with hash 1292120008, now seen corresponding path program 8 times [2024-11-28 02:23:25,167 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 02:23:25,167 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1015131138] [2024-11-28 02:23:25,167 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 02:23:25,167 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 02:23:25,178 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 02:23:25,178 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 02:23:25,298 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-28 02:23:25,298 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 02:23:25,298 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1015131138] [2024-11-28 02:23:25,298 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1015131138] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 02:23:25,299 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [592803728] [2024-11-28 02:23:25,299 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 02:23:25,299 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:23:25,299 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c403a49-d163-4e0b-bada-2e4588baed87/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 02:23:25,301 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c403a49-d163-4e0b-bada-2e4588baed87/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 02:23:25,304 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c403a49-d163-4e0b-bada-2e4588baed87/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-11-28 02:23:25,371 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 02:23:25,371 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 02:23:25,372 INFO L256 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-11-28 02:23:25,374 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 02:23:25,441 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-28 02:23:25,441 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 02:23:25,527 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-28 02:23:25,527 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [592803728] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 02:23:25,527 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 02:23:25,527 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 12 [2024-11-28 02:23:25,527 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [408212203] [2024-11-28 02:23:25,527 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 02:23:25,528 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-11-28 02:23:25,528 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 02:23:25,528 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-11-28 02:23:25,528 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2024-11-28 02:23:25,528 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 25 [2024-11-28 02:23:25,529 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 143 places, 347 transitions, 4492 flow. Second operand has 12 states, 12 states have (on average 6.666666666666667) internal successors, (80), 12 states have internal predecessors, (80), 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) [2024-11-28 02:23:25,529 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 02:23:25,529 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 25 [2024-11-28 02:23:25,529 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 02:23:27,522 INFO L124 PetriNetUnfolderBase]: 6612/9219 cut-off events. [2024-11-28 02:23:27,523 INFO L125 PetriNetUnfolderBase]: For 99440/99440 co-relation queries the response was YES. [2024-11-28 02:23:27,550 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63730 conditions, 9219 events. 6612/9219 cut-off events. For 99440/99440 co-relation queries the response was YES. Maximal size of possible extension queue 349. Compared 43905 event pairs, 750 based on Foata normal form. 166/9385 useless extension candidates. Maximal degree in co-relation 61980. Up to 3683 conditions per place. [2024-11-28 02:23:27,588 INFO L140 encePairwiseOnDemand]: 18/25 looper letters, 691 selfloop transitions, 231 changer transitions 0/923 dead transitions. [2024-11-28 02:23:27,588 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 165 places, 923 transitions, 14101 flow [2024-11-28 02:23:27,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2024-11-28 02:23:27,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2024-11-28 02:23:27,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 295 transitions. [2024-11-28 02:23:27,590 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5130434782608696 [2024-11-28 02:23:27,590 INFO L175 Difference]: Start difference. First operand has 143 places, 347 transitions, 4492 flow. Second operand 23 states and 295 transitions. [2024-11-28 02:23:27,590 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 165 places, 923 transitions, 14101 flow [2024-11-28 02:23:27,970 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 164 places, 923 transitions, 13168 flow, removed 386 selfloop flow, removed 1 redundant places. [2024-11-28 02:23:27,980 INFO L231 Difference]: Finished difference. Result has 174 places, 506 transitions, 7597 flow [2024-11-28 02:23:27,980 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=25, PETRI_DIFFERENCE_MINUEND_FLOW=4202, PETRI_DIFFERENCE_MINUEND_PLACES=142, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=347, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=110, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=213, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=7597, PETRI_PLACES=174, PETRI_TRANSITIONS=506} [2024-11-28 02:23:27,981 INFO L279 CegarLoopForPetriNet]: 28 programPoint places, 146 predicate places. [2024-11-28 02:23:27,981 INFO L471 AbstractCegarLoop]: Abstraction has has 174 places, 506 transitions, 7597 flow [2024-11-28 02:23:27,981 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 6.666666666666667) internal successors, (80), 12 states have internal predecessors, (80), 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) [2024-11-28 02:23:27,981 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 02:23:27,981 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 02:23:27,988 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c403a49-d163-4e0b-bada-2e4588baed87/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2024-11-28 02:23:28,181 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c403a49-d163-4e0b-bada-2e4588baed87/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2024-11-28 02:23:28,182 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-11-28 02:23:28,182 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 02:23:28,182 INFO L85 PathProgramCache]: Analyzing trace with hash 1749549807, now seen corresponding path program 9 times [2024-11-28 02:23:28,182 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 02:23:28,182 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [803513347] [2024-11-28 02:23:28,182 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-28 02:23:28,182 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 02:23:28,195 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-28 02:23:28,195 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 02:23:28,316 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-28 02:23:28,316 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 02:23:28,317 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [803513347] [2024-11-28 02:23:28,317 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [803513347] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 02:23:28,317 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2007366681] [2024-11-28 02:23:28,317 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-28 02:23:28,317 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:23:28,317 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c403a49-d163-4e0b-bada-2e4588baed87/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 02:23:28,319 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c403a49-d163-4e0b-bada-2e4588baed87/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 02:23:28,322 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c403a49-d163-4e0b-bada-2e4588baed87/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-11-28 02:23:28,394 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-28 02:23:28,394 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 02:23:28,395 INFO L256 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-11-28 02:23:28,397 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 02:23:28,467 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-28 02:23:28,467 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 02:23:28,621 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-28 02:23:28,621 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2007366681] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 02:23:28,621 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 02:23:28,622 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 11 [2024-11-28 02:23:28,622 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1472894505] [2024-11-28 02:23:28,622 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 02:23:28,622 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-11-28 02:23:28,622 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 02:23:28,623 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-11-28 02:23:28,623 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-11-28 02:23:28,623 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 25 [2024-11-28 02:23:28,623 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 174 places, 506 transitions, 7597 flow. Second operand has 11 states, 11 states have (on average 7.181818181818182) internal successors, (79), 11 states have internal predecessors, (79), 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) [2024-11-28 02:23:28,624 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 02:23:28,624 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 25 [2024-11-28 02:23:28,624 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 02:23:30,625 INFO L124 PetriNetUnfolderBase]: 7009/9875 cut-off events. [2024-11-28 02:23:30,625 INFO L125 PetriNetUnfolderBase]: For 173860/173860 co-relation queries the response was YES. [2024-11-28 02:23:30,671 INFO L83 FinitePrefix]: Finished finitePrefix Result has 77683 conditions, 9875 events. 7009/9875 cut-off events. For 173860/173860 co-relation queries the response was YES. Maximal size of possible extension queue 396. Compared 49493 event pairs, 1492 based on Foata normal form. 197/10072 useless extension candidates. Maximal degree in co-relation 75528. Up to 5343 conditions per place. [2024-11-28 02:23:30,704 INFO L140 encePairwiseOnDemand]: 19/25 looper letters, 655 selfloop transitions, 153 changer transitions 64/873 dead transitions. [2024-11-28 02:23:30,705 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 181 places, 873 transitions, 16309 flow [2024-11-28 02:23:30,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-28 02:23:30,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-11-28 02:23:30,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 115 transitions. [2024-11-28 02:23:30,706 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.575 [2024-11-28 02:23:30,706 INFO L175 Difference]: Start difference. First operand has 174 places, 506 transitions, 7597 flow. Second operand 8 states and 115 transitions. [2024-11-28 02:23:30,706 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 181 places, 873 transitions, 16309 flow [2024-11-28 02:23:31,567 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 181 places, 873 transitions, 13405 flow, removed 1452 selfloop flow, removed 0 redundant places. [2024-11-28 02:23:31,702 INFO L231 Difference]: Finished difference. Result has 185 places, 574 transitions, 8376 flow [2024-11-28 02:23:31,703 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=25, PETRI_DIFFERENCE_MINUEND_FLOW=6623, PETRI_DIFFERENCE_MINUEND_PLACES=174, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=506, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=92, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=366, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8376, PETRI_PLACES=185, PETRI_TRANSITIONS=574} [2024-11-28 02:23:31,703 INFO L279 CegarLoopForPetriNet]: 28 programPoint places, 157 predicate places. [2024-11-28 02:23:31,703 INFO L471 AbstractCegarLoop]: Abstraction has has 185 places, 574 transitions, 8376 flow [2024-11-28 02:23:31,703 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.181818181818182) internal successors, (79), 11 states have internal predecessors, (79), 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) [2024-11-28 02:23:31,703 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 02:23:31,704 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 02:23:31,710 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c403a49-d163-4e0b-bada-2e4588baed87/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2024-11-28 02:23:31,904 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c403a49-d163-4e0b-bada-2e4588baed87/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2024-11-28 02:23:31,904 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-11-28 02:23:31,904 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 02:23:31,905 INFO L85 PathProgramCache]: Analyzing trace with hash 316225815, now seen corresponding path program 10 times [2024-11-28 02:23:31,905 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 02:23:31,905 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [381632815] [2024-11-28 02:23:31,905 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-28 02:23:31,905 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 02:23:31,916 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-28 02:23:31,916 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 02:23:32,084 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 02:23:32,084 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 02:23:32,084 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [381632815] [2024-11-28 02:23:32,084 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [381632815] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 02:23:32,084 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1304232870] [2024-11-28 02:23:32,084 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-28 02:23:32,085 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:23:32,085 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c403a49-d163-4e0b-bada-2e4588baed87/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 02:23:32,087 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c403a49-d163-4e0b-bada-2e4588baed87/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 02:23:32,089 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c403a49-d163-4e0b-bada-2e4588baed87/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-11-28 02:23:32,156 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-28 02:23:32,156 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 02:23:32,157 INFO L256 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-11-28 02:23:32,158 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 02:23:32,241 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-28 02:23:32,245 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 02:23:32,378 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-28 02:23:32,378 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1304232870] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 02:23:32,378 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 02:23:32,378 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 7] total 18 [2024-11-28 02:23:32,378 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1824214202] [2024-11-28 02:23:32,378 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 02:23:32,379 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-11-28 02:23:32,380 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 02:23:32,381 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-11-28 02:23:32,381 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=253, Unknown=0, NotChecked=0, Total=306 [2024-11-28 02:23:32,381 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 25 [2024-11-28 02:23:32,382 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 185 places, 574 transitions, 8376 flow. Second operand has 18 states, 18 states have (on average 6.222222222222222) internal successors, (112), 18 states have internal predecessors, (112), 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) [2024-11-28 02:23:32,382 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 02:23:32,382 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 25 [2024-11-28 02:23:32,382 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 02:23:38,965 INFO L124 PetriNetUnfolderBase]: 9713/13625 cut-off events. [2024-11-28 02:23:38,965 INFO L125 PetriNetUnfolderBase]: For 255059/255059 co-relation queries the response was YES. [2024-11-28 02:23:39,030 INFO L83 FinitePrefix]: Finished finitePrefix Result has 104311 conditions, 13625 events. 9713/13625 cut-off events. For 255059/255059 co-relation queries the response was YES. Maximal size of possible extension queue 632. Compared 71675 event pairs, 739 based on Foata normal form. 627/14252 useless extension candidates. Maximal degree in co-relation 101912. Up to 5073 conditions per place. [2024-11-28 02:23:39,071 INFO L140 encePairwiseOnDemand]: 16/25 looper letters, 835 selfloop transitions, 747 changer transitions 104/1687 dead transitions. [2024-11-28 02:23:39,071 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 257 places, 1687 transitions, 28755 flow [2024-11-28 02:23:39,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2024-11-28 02:23:39,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2024-11-28 02:23:39,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 804 transitions. [2024-11-28 02:23:39,075 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.44054794520547946 [2024-11-28 02:23:39,075 INFO L175 Difference]: Start difference. First operand has 185 places, 574 transitions, 8376 flow. Second operand 73 states and 804 transitions. [2024-11-28 02:23:39,075 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 257 places, 1687 transitions, 28755 flow [2024-11-28 02:23:41,242 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 255 places, 1687 transitions, 28211 flow, removed 183 selfloop flow, removed 2 redundant places. [2024-11-28 02:23:41,259 INFO L231 Difference]: Finished difference. Result has 288 places, 1139 transitions, 21689 flow [2024-11-28 02:23:41,259 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=25, PETRI_DIFFERENCE_MINUEND_FLOW=8078, PETRI_DIFFERENCE_MINUEND_PLACES=183, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=564, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=277, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=242, PETRI_DIFFERENCE_SUBTRAHEND_STATES=73, PETRI_FLOW=21689, PETRI_PLACES=288, PETRI_TRANSITIONS=1139} [2024-11-28 02:23:41,260 INFO L279 CegarLoopForPetriNet]: 28 programPoint places, 260 predicate places. [2024-11-28 02:23:41,260 INFO L471 AbstractCegarLoop]: Abstraction has has 288 places, 1139 transitions, 21689 flow [2024-11-28 02:23:41,260 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 6.222222222222222) internal successors, (112), 18 states have internal predecessors, (112), 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) [2024-11-28 02:23:41,260 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 02:23:41,260 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 02:23:41,270 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c403a49-d163-4e0b-bada-2e4588baed87/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2024-11-28 02:23:41,464 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c403a49-d163-4e0b-bada-2e4588baed87/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:23:41,464 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-11-28 02:23:41,465 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 02:23:41,465 INFO L85 PathProgramCache]: Analyzing trace with hash 1593492595, now seen corresponding path program 11 times [2024-11-28 02:23:41,465 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 02:23:41,465 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1329598166] [2024-11-28 02:23:41,465 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-28 02:23:41,465 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 02:23:41,477 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 02:23:41,477 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 02:23:41,586 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-28 02:23:41,586 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 02:23:41,586 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1329598166] [2024-11-28 02:23:41,587 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1329598166] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 02:23:41,587 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [118860983] [2024-11-28 02:23:41,587 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-28 02:23:41,587 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:23:41,587 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c403a49-d163-4e0b-bada-2e4588baed87/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 02:23:41,589 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c403a49-d163-4e0b-bada-2e4588baed87/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 02:23:41,594 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c403a49-d163-4e0b-bada-2e4588baed87/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-11-28 02:23:41,652 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 02:23:41,653 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 02:23:41,654 INFO L256 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-11-28 02:23:41,654 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 02:23:41,727 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-28 02:23:41,727 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 02:23:41,838 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-28 02:23:41,839 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [118860983] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 02:23:41,839 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 02:23:41,839 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 16 [2024-11-28 02:23:41,839 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [940396781] [2024-11-28 02:23:41,839 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 02:23:41,839 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-11-28 02:23:41,840 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 02:23:41,840 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-11-28 02:23:41,841 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=191, Unknown=0, NotChecked=0, Total=240 [2024-11-28 02:23:41,841 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 25 [2024-11-28 02:23:41,841 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 288 places, 1139 transitions, 21689 flow. Second operand has 16 states, 16 states have (on average 6.5) internal successors, (104), 16 states have internal predecessors, (104), 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) [2024-11-28 02:23:41,841 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 02:23:41,841 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 25 [2024-11-28 02:23:41,842 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 02:23:50,104 INFO L124 PetriNetUnfolderBase]: 13826/19134 cut-off events. [2024-11-28 02:23:50,105 INFO L125 PetriNetUnfolderBase]: For 631707/631707 co-relation queries the response was YES. [2024-11-28 02:23:50,280 INFO L83 FinitePrefix]: Finished finitePrefix Result has 180024 conditions, 19134 events. 13826/19134 cut-off events. For 631707/631707 co-relation queries the response was YES. Maximal size of possible extension queue 917. Compared 103819 event pairs, 595 based on Foata normal form. 738/19872 useless extension candidates. Maximal degree in co-relation 179500. Up to 6157 conditions per place. [2024-11-28 02:23:50,381 INFO L140 encePairwiseOnDemand]: 16/25 looper letters, 1636 selfloop transitions, 1254 changer transitions 37/2928 dead transitions. [2024-11-28 02:23:50,381 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 338 places, 2928 transitions, 61898 flow [2024-11-28 02:23:50,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2024-11-28 02:23:50,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2024-11-28 02:23:50,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 672 transitions. [2024-11-28 02:23:50,384 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.47157894736842104 [2024-11-28 02:23:50,385 INFO L175 Difference]: Start difference. First operand has 288 places, 1139 transitions, 21689 flow. Second operand 57 states and 672 transitions. [2024-11-28 02:23:50,385 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 338 places, 2928 transitions, 61898 flow [2024-11-28 02:24:01,156 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 331 places, 2928 transitions, 52853 flow, removed 4248 selfloop flow, removed 7 redundant places. [2024-11-28 02:24:01,197 INFO L231 Difference]: Finished difference. Result has 373 places, 2003 transitions, 38943 flow [2024-11-28 02:24:01,198 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=25, PETRI_DIFFERENCE_MINUEND_FLOW=16570, PETRI_DIFFERENCE_MINUEND_PLACES=275, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1121, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=468, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=522, PETRI_DIFFERENCE_SUBTRAHEND_STATES=57, PETRI_FLOW=38943, PETRI_PLACES=373, PETRI_TRANSITIONS=2003} [2024-11-28 02:24:01,198 INFO L279 CegarLoopForPetriNet]: 28 programPoint places, 345 predicate places. [2024-11-28 02:24:01,198 INFO L471 AbstractCegarLoop]: Abstraction has has 373 places, 2003 transitions, 38943 flow [2024-11-28 02:24:01,198 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 6.5) internal successors, (104), 16 states have internal predecessors, (104), 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) [2024-11-28 02:24:01,198 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 02:24:01,198 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 02:24:01,204 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c403a49-d163-4e0b-bada-2e4588baed87/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2024-11-28 02:24:01,399 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c403a49-d163-4e0b-bada-2e4588baed87/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:24:01,399 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-11-28 02:24:01,399 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 02:24:01,399 INFO L85 PathProgramCache]: Analyzing trace with hash -2124982929, now seen corresponding path program 12 times [2024-11-28 02:24:01,399 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 02:24:01,399 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1914596590] [2024-11-28 02:24:01,400 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-28 02:24:01,400 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 02:24:01,415 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2024-11-28 02:24:01,416 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 02:24:01,717 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-28 02:24:01,717 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 02:24:01,718 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1914596590] [2024-11-28 02:24:01,718 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1914596590] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 02:24:01,718 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [555674094] [2024-11-28 02:24:01,718 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-28 02:24:01,718 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:24:01,718 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c403a49-d163-4e0b-bada-2e4588baed87/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 02:24:01,720 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c403a49-d163-4e0b-bada-2e4588baed87/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 02:24:01,723 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c403a49-d163-4e0b-bada-2e4588baed87/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2024-11-28 02:24:01,784 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2024-11-28 02:24:01,784 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 02:24:01,785 INFO L256 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-11-28 02:24:01,786 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 02:24:01,864 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-28 02:24:01,864 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 02:24:01,972 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-28 02:24:01,972 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [555674094] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 02:24:01,973 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 02:24:01,973 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 17 [2024-11-28 02:24:01,973 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1425654091] [2024-11-28 02:24:01,973 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 02:24:01,973 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-11-28 02:24:01,974 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 02:24:01,974 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-11-28 02:24:01,974 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=219, Unknown=0, NotChecked=0, Total=272 [2024-11-28 02:24:01,974 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 25 [2024-11-28 02:24:01,975 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 373 places, 2003 transitions, 38943 flow. Second operand has 17 states, 17 states have (on average 6.0588235294117645) internal successors, (103), 17 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) [2024-11-28 02:24:01,975 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 02:24:01,975 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 25 [2024-11-28 02:24:01,975 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 02:24:14,632 INFO L124 PetriNetUnfolderBase]: 17522/24194 cut-off events. [2024-11-28 02:24:14,632 INFO L125 PetriNetUnfolderBase]: For 1225288/1225288 co-relation queries the response was YES. [2024-11-28 02:24:15,194 INFO L83 FinitePrefix]: Finished finitePrefix Result has 277691 conditions, 24194 events. 17522/24194 cut-off events. For 1225288/1225288 co-relation queries the response was YES. Maximal size of possible extension queue 1127. Compared 134387 event pairs, 1349 based on Foata normal form. 480/24672 useless extension candidates. Maximal degree in co-relation 277307. Up to 8733 conditions per place. [2024-11-28 02:24:15,375 INFO L140 encePairwiseOnDemand]: 18/25 looper letters, 2272 selfloop transitions, 1278 changer transitions 38/3589 dead transitions. [2024-11-28 02:24:15,376 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 395 places, 3589 transitions, 89433 flow [2024-11-28 02:24:15,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2024-11-28 02:24:15,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2024-11-28 02:24:15,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 297 transitions. [2024-11-28 02:24:15,378 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.495 [2024-11-28 02:24:15,378 INFO L175 Difference]: Start difference. First operand has 373 places, 2003 transitions, 38943 flow. Second operand 24 states and 297 transitions. [2024-11-28 02:24:15,378 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 395 places, 3589 transitions, 89433 flow