./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/weaver/chl-chromosome-trans.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 0e0057cc Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91e2605f-eff2-4533-a1b2-a84cc5102bbd/bin/uautomizer-verify-BQ2R08f2Ya/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91e2605f-eff2-4533-a1b2-a84cc5102bbd/bin/uautomizer-verify-BQ2R08f2Ya/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91e2605f-eff2-4533-a1b2-a84cc5102bbd/bin/uautomizer-verify-BQ2R08f2Ya/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91e2605f-eff2-4533-a1b2-a84cc5102bbd/bin/uautomizer-verify-BQ2R08f2Ya/config/AutomizerReach.xml -i ../../sv-benchmarks/c/weaver/chl-chromosome-trans.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91e2605f-eff2-4533-a1b2-a84cc5102bbd/bin/uautomizer-verify-BQ2R08f2Ya/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91e2605f-eff2-4533-a1b2-a84cc5102bbd/bin/uautomizer-verify-BQ2R08f2Ya --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 f36f5593156fc25b34b4c706b0d898a2d66ee8bab5f6d91cd69ff9cf3c129193 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-29 05:02:30,751 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-29 05:02:30,815 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91e2605f-eff2-4533-a1b2-a84cc5102bbd/bin/uautomizer-verify-BQ2R08f2Ya/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-29 05:02:30,819 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-29 05:02:30,820 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-29 05:02:30,846 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-29 05:02:30,846 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-29 05:02:30,847 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-29 05:02:30,848 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-29 05:02:30,848 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-29 05:02:30,849 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-29 05:02:30,849 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-29 05:02:30,850 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-29 05:02:30,850 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-29 05:02:30,851 INFO L153 SettingsManager]: * Use SBE=true [2023-11-29 05:02:30,852 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-29 05:02:30,852 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-29 05:02:30,853 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-29 05:02:30,853 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-29 05:02:30,854 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-29 05:02:30,854 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-29 05:02:30,855 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-29 05:02:30,855 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-29 05:02:30,856 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-29 05:02:30,856 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-29 05:02:30,857 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-29 05:02:30,857 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-29 05:02:30,857 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-29 05:02:30,858 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-29 05:02:30,858 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-29 05:02:30,858 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-29 05:02:30,859 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-29 05:02:30,859 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-29 05:02:30,860 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-29 05:02:30,860 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-29 05:02:30,860 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-29 05:02:30,860 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-29 05:02:30,861 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-29 05:02:30,861 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-29 05:02:30,861 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-29 05:02:30,861 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-29 05:02:30,861 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-29 05:02:30,862 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91e2605f-eff2-4533-a1b2-a84cc5102bbd/bin/uautomizer-verify-BQ2R08f2Ya/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91e2605f-eff2-4533-a1b2-a84cc5102bbd/bin/uautomizer-verify-BQ2R08f2Ya Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> f36f5593156fc25b34b4c706b0d898a2d66ee8bab5f6d91cd69ff9cf3c129193 [2023-11-29 05:02:31,078 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-29 05:02:31,100 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-29 05:02:31,102 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-29 05:02:31,104 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-29 05:02:31,104 INFO L274 PluginConnector]: CDTParser initialized [2023-11-29 05:02:31,105 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91e2605f-eff2-4533-a1b2-a84cc5102bbd/bin/uautomizer-verify-BQ2R08f2Ya/../../sv-benchmarks/c/weaver/chl-chromosome-trans.wvr.c [2023-11-29 05:02:33,909 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-29 05:02:34,090 INFO L384 CDTParser]: Found 1 translation units. [2023-11-29 05:02:34,091 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91e2605f-eff2-4533-a1b2-a84cc5102bbd/sv-benchmarks/c/weaver/chl-chromosome-trans.wvr.c [2023-11-29 05:02:34,098 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91e2605f-eff2-4533-a1b2-a84cc5102bbd/bin/uautomizer-verify-BQ2R08f2Ya/data/464e557be/b638608f8c614429ae662b356f173757/FLAGb9fc2d14e [2023-11-29 05:02:34,111 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91e2605f-eff2-4533-a1b2-a84cc5102bbd/bin/uautomizer-verify-BQ2R08f2Ya/data/464e557be/b638608f8c614429ae662b356f173757 [2023-11-29 05:02:34,113 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-29 05:02:34,115 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-29 05:02:34,116 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-29 05:02:34,117 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-29 05:02:34,121 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-29 05:02:34,122 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 05:02:34" (1/1) ... [2023-11-29 05:02:34,123 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@f7706d1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 05:02:34, skipping insertion in model container [2023-11-29 05:02:34,123 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 05:02:34" (1/1) ... [2023-11-29 05:02:34,146 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-29 05:02:34,298 WARN L240 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_91e2605f-eff2-4533-a1b2-a84cc5102bbd/sv-benchmarks/c/weaver/chl-chromosome-trans.wvr.c[3073,3086] [2023-11-29 05:02:34,309 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-29 05:02:34,319 INFO L202 MainTranslator]: Completed pre-run [2023-11-29 05:02:34,347 WARN L240 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_91e2605f-eff2-4533-a1b2-a84cc5102bbd/sv-benchmarks/c/weaver/chl-chromosome-trans.wvr.c[3073,3086] [2023-11-29 05:02:34,352 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-29 05:02:34,369 INFO L206 MainTranslator]: Completed translation [2023-11-29 05:02:34,369 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 05:02:34 WrapperNode [2023-11-29 05:02:34,369 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-29 05:02:34,370 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-29 05:02:34,371 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-29 05:02:34,371 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-29 05:02:34,378 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 05:02:34" (1/1) ... [2023-11-29 05:02:34,388 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 05:02:34" (1/1) ... [2023-11-29 05:02:34,420 INFO L138 Inliner]: procedures = 26, calls = 46, calls flagged for inlining = 16, calls inlined = 24, statements flattened = 282 [2023-11-29 05:02:34,420 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-29 05:02:34,421 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-29 05:02:34,421 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-29 05:02:34,422 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-29 05:02:34,432 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 05:02:34" (1/1) ... [2023-11-29 05:02:34,432 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 05:02:34" (1/1) ... [2023-11-29 05:02:34,436 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 05:02:34" (1/1) ... [2023-11-29 05:02:34,456 INFO L175 MemorySlicer]: Split 17 memory accesses to 5 slices as follows [2, 9, 2, 2, 2]. 53 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0, 0, 0, 0]. The 6 writes are split as follows [0, 3, 1, 1, 1]. [2023-11-29 05:02:34,457 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 05:02:34" (1/1) ... [2023-11-29 05:02:34,457 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 05:02:34" (1/1) ... [2023-11-29 05:02:34,470 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 05:02:34" (1/1) ... [2023-11-29 05:02:34,475 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 05:02:34" (1/1) ... [2023-11-29 05:02:34,478 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 05:02:34" (1/1) ... [2023-11-29 05:02:34,481 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 05:02:34" (1/1) ... [2023-11-29 05:02:34,486 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-29 05:02:34,487 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-29 05:02:34,487 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-29 05:02:34,488 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-29 05:02:34,488 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 05:02:34" (1/1) ... [2023-11-29 05:02:34,495 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-29 05:02:34,504 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91e2605f-eff2-4533-a1b2-a84cc5102bbd/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:02:34,529 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91e2605f-eff2-4533-a1b2-a84cc5102bbd/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2023-11-29 05:02:34,544 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91e2605f-eff2-4533-a1b2-a84cc5102bbd/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2023-11-29 05:02:34,562 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-29 05:02:34,562 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-29 05:02:34,563 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2023-11-29 05:02:34,563 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2023-11-29 05:02:34,563 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2023-11-29 05:02:34,563 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2023-11-29 05:02:34,563 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#4 [2023-11-29 05:02:34,563 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2023-11-29 05:02:34,564 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2023-11-29 05:02:34,564 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2023-11-29 05:02:34,564 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2023-11-29 05:02:34,564 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#4 [2023-11-29 05:02:34,564 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-11-29 05:02:34,565 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-11-29 05:02:34,565 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-11-29 05:02:34,565 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-11-29 05:02:34,565 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2023-11-29 05:02:34,565 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2023-11-29 05:02:34,565 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-11-29 05:02:34,566 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2023-11-29 05:02:34,566 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2023-11-29 05:02:34,566 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2023-11-29 05:02:34,566 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#4 [2023-11-29 05:02:34,566 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-29 05:02:34,567 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-29 05:02:34,567 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-29 05:02:34,567 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-29 05:02:34,568 WARN L213 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-11-29 05:02:34,684 INFO L241 CfgBuilder]: Building ICFG [2023-11-29 05:02:34,686 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-29 05:02:35,080 INFO L282 CfgBuilder]: Performing block encoding [2023-11-29 05:02:35,468 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-29 05:02:35,468 INFO L309 CfgBuilder]: Removed 6 assume(true) statements. [2023-11-29 05:02:35,468 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 05:02:35 BoogieIcfgContainer [2023-11-29 05:02:35,469 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-29 05:02:35,471 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-29 05:02:35,471 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-29 05:02:35,474 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-29 05:02:35,475 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.11 05:02:34" (1/3) ... [2023-11-29 05:02:35,475 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@42d569e4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 05:02:35, skipping insertion in model container [2023-11-29 05:02:35,475 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 05:02:34" (2/3) ... [2023-11-29 05:02:35,476 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@42d569e4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 05:02:35, skipping insertion in model container [2023-11-29 05:02:35,476 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 05:02:35" (3/3) ... [2023-11-29 05:02:35,477 INFO L112 eAbstractionObserver]: Analyzing ICFG chl-chromosome-trans.wvr.c [2023-11-29 05:02:35,487 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-11-29 05:02:35,497 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-29 05:02:35,498 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-29 05:02:35,498 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-29 05:02:35,553 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2023-11-29 05:02:35,587 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 37 places, 33 transitions, 87 flow [2023-11-29 05:02:35,618 INFO L124 PetriNetUnfolderBase]: 6/30 cut-off events. [2023-11-29 05:02:35,618 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-11-29 05:02:35,621 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43 conditions, 30 events. 6/30 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 20 event pairs, 0 based on Foata normal form. 0/23 useless extension candidates. Maximal degree in co-relation 21. Up to 2 conditions per place. [2023-11-29 05:02:35,621 INFO L82 GeneralOperation]: Start removeDead. Operand has 37 places, 33 transitions, 87 flow [2023-11-29 05:02:35,625 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 33 places, 29 transitions, 76 flow [2023-11-29 05:02:35,636 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-29 05:02:35,643 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopHeads, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@19cd1b77, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-29 05:02:35,643 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2023-11-29 05:02:35,676 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-29 05:02:35,676 INFO L124 PetriNetUnfolderBase]: 6/28 cut-off events. [2023-11-29 05:02:35,676 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-11-29 05:02:35,677 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 05:02:35,677 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:02:35,678 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-29 05:02:35,683 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:02:35,683 INFO L85 PathProgramCache]: Analyzing trace with hash 552748514, now seen corresponding path program 1 times [2023-11-29 05:02:35,690 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:02:35,691 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2067450265] [2023-11-29 05:02:35,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:02:35,691 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:02:35,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:02:36,064 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:02:36,065 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:02:36,065 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2067450265] [2023-11-29 05:02:36,066 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2067450265] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 05:02:36,066 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 05:02:36,066 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-29 05:02:36,067 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2070265625] [2023-11-29 05:02:36,068 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 05:02:36,075 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 05:02:36,079 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:02:36,101 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 05:02:36,102 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 05:02:36,103 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 33 [2023-11-29 05:02:36,105 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 33 places, 29 transitions, 76 flow. Second operand has 3 states, 3 states have (on average 11.333333333333334) internal successors, (34), 3 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:02:36,105 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 05:02:36,106 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 33 [2023-11-29 05:02:36,107 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 05:02:36,270 INFO L124 PetriNetUnfolderBase]: 223/335 cut-off events. [2023-11-29 05:02:36,271 INFO L125 PetriNetUnfolderBase]: For 32/32 co-relation queries the response was YES. [2023-11-29 05:02:36,273 INFO L83 FinitePrefix]: Finished finitePrefix Result has 713 conditions, 335 events. 223/335 cut-off events. For 32/32 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 773 event pairs, 138 based on Foata normal form. 0/250 useless extension candidates. Maximal degree in co-relation 534. Up to 332 conditions per place. [2023-11-29 05:02:36,277 INFO L140 encePairwiseOnDemand]: 26/33 looper letters, 25 selfloop transitions, 6 changer transitions 0/32 dead transitions. [2023-11-29 05:02:36,277 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 35 places, 32 transitions, 144 flow [2023-11-29 05:02:36,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 05:02:36,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-29 05:02:36,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 46 transitions. [2023-11-29 05:02:36,290 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46464646464646464 [2023-11-29 05:02:36,290 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 46 transitions. [2023-11-29 05:02:36,291 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 46 transitions. [2023-11-29 05:02:36,292 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 05:02:36,294 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 46 transitions. [2023-11-29 05:02:36,296 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 15.333333333333334) internal successors, (46), 3 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:02:36,299 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 33.0) internal successors, (132), 4 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:02:36,300 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 33.0) internal successors, (132), 4 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:02:36,301 INFO L175 Difference]: Start difference. First operand has 33 places, 29 transitions, 76 flow. Second operand 3 states and 46 transitions. [2023-11-29 05:02:36,303 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 35 places, 32 transitions, 144 flow [2023-11-29 05:02:36,305 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 29 places, 32 transitions, 132 flow, removed 0 selfloop flow, removed 6 redundant places. [2023-11-29 05:02:36,308 INFO L231 Difference]: Finished difference. Result has 30 places, 32 transitions, 96 flow [2023-11-29 05:02:36,310 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=64, PETRI_DIFFERENCE_MINUEND_PLACES=27, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=96, PETRI_PLACES=30, PETRI_TRANSITIONS=32} [2023-11-29 05:02:36,313 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, -3 predicate places. [2023-11-29 05:02:36,313 INFO L495 AbstractCegarLoop]: Abstraction has has 30 places, 32 transitions, 96 flow [2023-11-29 05:02:36,314 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 11.333333333333334) internal successors, (34), 3 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:02:36,314 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 05:02:36,314 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:02:36,314 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-29 05:02:36,315 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-29 05:02:36,315 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:02:36,315 INFO L85 PathProgramCache]: Analyzing trace with hash -724749522, now seen corresponding path program 1 times [2023-11-29 05:02:36,315 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:02:36,316 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1748354293] [2023-11-29 05:02:36,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:02:36,316 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:02:36,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:02:36,542 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-29 05:02:36,543 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:02:36,543 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1748354293] [2023-11-29 05:02:36,543 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1748354293] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 05:02:36,543 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 05:02:36,544 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-29 05:02:36,544 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [7720508] [2023-11-29 05:02:36,544 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 05:02:36,545 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-29 05:02:36,546 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:02:36,546 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-29 05:02:36,546 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-29 05:02:36,547 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 33 [2023-11-29 05:02:36,547 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 30 places, 32 transitions, 96 flow. Second operand has 4 states, 4 states have (on average 10.25) internal successors, (41), 4 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:02:36,547 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 05:02:36,547 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 33 [2023-11-29 05:02:36,547 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 05:02:36,715 INFO L124 PetriNetUnfolderBase]: 341/506 cut-off events. [2023-11-29 05:02:36,715 INFO L125 PetriNetUnfolderBase]: For 14/14 co-relation queries the response was YES. [2023-11-29 05:02:36,717 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1041 conditions, 506 events. 341/506 cut-off events. For 14/14 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 1386 event pairs, 138 based on Foata normal form. 1/370 useless extension candidates. Maximal degree in co-relation 1010. Up to 335 conditions per place. [2023-11-29 05:02:36,720 INFO L140 encePairwiseOnDemand]: 30/33 looper letters, 41 selfloop transitions, 2 changer transitions 2/46 dead transitions. [2023-11-29 05:02:36,720 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 32 places, 46 transitions, 217 flow [2023-11-29 05:02:36,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 05:02:36,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-29 05:02:36,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 55 transitions. [2023-11-29 05:02:36,722 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5555555555555556 [2023-11-29 05:02:36,722 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 55 transitions. [2023-11-29 05:02:36,722 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 55 transitions. [2023-11-29 05:02:36,722 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 05:02:36,722 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 55 transitions. [2023-11-29 05:02:36,723 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 18.333333333333332) internal successors, (55), 3 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:02:36,724 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 33.0) internal successors, (132), 4 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:02:36,724 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 33.0) internal successors, (132), 4 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:02:36,724 INFO L175 Difference]: Start difference. First operand has 30 places, 32 transitions, 96 flow. Second operand 3 states and 55 transitions. [2023-11-29 05:02:36,725 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 32 places, 46 transitions, 217 flow [2023-11-29 05:02:36,726 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 31 places, 46 transitions, 211 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-29 05:02:36,728 INFO L231 Difference]: Finished difference. Result has 32 places, 33 transitions, 102 flow [2023-11-29 05:02:36,728 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=90, PETRI_DIFFERENCE_MINUEND_PLACES=29, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=102, PETRI_PLACES=32, PETRI_TRANSITIONS=33} [2023-11-29 05:02:36,729 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, -1 predicate places. [2023-11-29 05:02:36,729 INFO L495 AbstractCegarLoop]: Abstraction has has 32 places, 33 transitions, 102 flow [2023-11-29 05:02:36,729 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 10.25) internal successors, (41), 4 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:02:36,729 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 05:02:36,729 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:02:36,730 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-29 05:02:36,730 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-29 05:02:36,731 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:02:36,731 INFO L85 PathProgramCache]: Analyzing trace with hash 1297276284, now seen corresponding path program 1 times [2023-11-29 05:02:36,731 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:02:36,731 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1767706867] [2023-11-29 05:02:36,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:02:36,732 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:02:36,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:02:36,920 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-29 05:02:36,920 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:02:36,920 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1767706867] [2023-11-29 05:02:36,921 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1767706867] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 05:02:36,921 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1501199815] [2023-11-29 05:02:36,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:02:36,921 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:02:36,921 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91e2605f-eff2-4533-a1b2-a84cc5102bbd/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:02:36,923 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91e2605f-eff2-4533-a1b2-a84cc5102bbd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:02:36,931 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91e2605f-eff2-4533-a1b2-a84cc5102bbd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-29 05:02:37,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:02:37,092 INFO L262 TraceCheckSpWp]: Trace formula consists of 326 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-29 05:02:37,098 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:02:37,149 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-29 05:02:37,149 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 05:02:37,179 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-29 05:02:37,180 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1501199815] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 05:02:37,180 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 05:02:37,180 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3, 3] total 8 [2023-11-29 05:02:37,181 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1141509088] [2023-11-29 05:02:37,181 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 05:02:37,181 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-29 05:02:37,182 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:02:37,182 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-29 05:02:37,183 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=29, Unknown=0, NotChecked=0, Total=56 [2023-11-29 05:02:37,183 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 33 [2023-11-29 05:02:37,184 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 32 places, 33 transitions, 102 flow. Second operand has 8 states, 8 states have (on average 8.25) internal successors, (66), 8 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:02:37,184 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 05:02:37,184 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 33 [2023-11-29 05:02:37,184 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 05:02:37,387 INFO L124 PetriNetUnfolderBase]: 341/515 cut-off events. [2023-11-29 05:02:37,388 INFO L125 PetriNetUnfolderBase]: For 94/94 co-relation queries the response was YES. [2023-11-29 05:02:37,389 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1171 conditions, 515 events. 341/515 cut-off events. For 94/94 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 1353 event pairs, 228 based on Foata normal form. 0/428 useless extension candidates. Maximal degree in co-relation 1109. Up to 503 conditions per place. [2023-11-29 05:02:37,393 INFO L140 encePairwiseOnDemand]: 26/33 looper letters, 26 selfloop transitions, 15 changer transitions 0/42 dead transitions. [2023-11-29 05:02:37,393 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 37 places, 42 transitions, 220 flow [2023-11-29 05:02:37,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-29 05:02:37,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-29 05:02:37,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 73 transitions. [2023-11-29 05:02:37,395 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3686868686868687 [2023-11-29 05:02:37,395 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 73 transitions. [2023-11-29 05:02:37,395 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 73 transitions. [2023-11-29 05:02:37,395 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 05:02:37,396 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 73 transitions. [2023-11-29 05:02:37,396 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 12.166666666666666) internal successors, (73), 6 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:02:37,397 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 33.0) internal successors, (231), 7 states have internal predecessors, (231), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:02:37,398 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 33.0) internal successors, (231), 7 states have internal predecessors, (231), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:02:37,398 INFO L175 Difference]: Start difference. First operand has 32 places, 33 transitions, 102 flow. Second operand 6 states and 73 transitions. [2023-11-29 05:02:37,398 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 37 places, 42 transitions, 220 flow [2023-11-29 05:02:37,400 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 36 places, 42 transitions, 218 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-29 05:02:37,402 INFO L231 Difference]: Finished difference. Result has 39 places, 42 transitions, 196 flow [2023-11-29 05:02:37,402 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=100, PETRI_DIFFERENCE_MINUEND_PLACES=31, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=196, PETRI_PLACES=39, PETRI_TRANSITIONS=42} [2023-11-29 05:02:37,403 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 6 predicate places. [2023-11-29 05:02:37,403 INFO L495 AbstractCegarLoop]: Abstraction has has 39 places, 42 transitions, 196 flow [2023-11-29 05:02:37,403 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.25) internal successors, (66), 8 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:02:37,403 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 05:02:37,404 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:02:37,416 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91e2605f-eff2-4533-a1b2-a84cc5102bbd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-29 05:02:37,604 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91e2605f-eff2-4533-a1b2-a84cc5102bbd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:02:37,604 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-29 05:02:37,605 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:02:37,605 INFO L85 PathProgramCache]: Analyzing trace with hash 1716219622, now seen corresponding path program 2 times [2023-11-29 05:02:37,605 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:02:37,605 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [501260450] [2023-11-29 05:02:37,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:02:37,606 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:02:37,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:02:37,888 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-11-29 05:02:37,888 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:02:37,888 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [501260450] [2023-11-29 05:02:37,889 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [501260450] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 05:02:37,889 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2066284874] [2023-11-29 05:02:37,889 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 05:02:37,889 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:02:37,889 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91e2605f-eff2-4533-a1b2-a84cc5102bbd/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:02:37,890 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91e2605f-eff2-4533-a1b2-a84cc5102bbd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:02:37,895 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91e2605f-eff2-4533-a1b2-a84cc5102bbd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-29 05:02:38,057 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-11-29 05:02:38,057 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 05:02:38,059 INFO L262 TraceCheckSpWp]: Trace formula consists of 284 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-29 05:02:38,062 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:02:38,103 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2023-11-29 05:02:38,103 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 05:02:38,103 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2066284874] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 05:02:38,104 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-29 05:02:38,104 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [7] total 9 [2023-11-29 05:02:38,104 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [583723909] [2023-11-29 05:02:38,104 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 05:02:38,104 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-29 05:02:38,105 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:02:38,105 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-29 05:02:38,106 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2023-11-29 05:02:38,106 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 33 [2023-11-29 05:02:38,106 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 39 places, 42 transitions, 196 flow. Second operand has 4 states, 4 states have (on average 10.5) internal successors, (42), 4 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:02:38,106 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 05:02:38,106 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 33 [2023-11-29 05:02:38,106 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 05:02:38,389 INFO L124 PetriNetUnfolderBase]: 567/861 cut-off events. [2023-11-29 05:02:38,389 INFO L125 PetriNetUnfolderBase]: For 109/109 co-relation queries the response was YES. [2023-11-29 05:02:38,391 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1938 conditions, 861 events. 567/861 cut-off events. For 109/109 co-relation queries the response was YES. Maximal size of possible extension queue 44. Compared 2926 event pairs, 228 based on Foata normal form. 22/725 useless extension candidates. Maximal degree in co-relation 1849. Up to 515 conditions per place. [2023-11-29 05:02:38,396 INFO L140 encePairwiseOnDemand]: 29/33 looper letters, 67 selfloop transitions, 3 changer transitions 2/73 dead transitions. [2023-11-29 05:02:38,396 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 73 transitions, 423 flow [2023-11-29 05:02:38,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-29 05:02:38,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-29 05:02:38,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 74 transitions. [2023-11-29 05:02:38,401 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5606060606060606 [2023-11-29 05:02:38,401 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 74 transitions. [2023-11-29 05:02:38,401 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 74 transitions. [2023-11-29 05:02:38,402 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 05:02:38,402 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 74 transitions. [2023-11-29 05:02:38,402 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 18.5) internal successors, (74), 4 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:02:38,403 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 33.0) internal successors, (165), 5 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:02:38,403 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 33.0) internal successors, (165), 5 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:02:38,404 INFO L175 Difference]: Start difference. First operand has 39 places, 42 transitions, 196 flow. Second operand 4 states and 74 transitions. [2023-11-29 05:02:38,404 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 73 transitions, 423 flow [2023-11-29 05:02:38,406 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 73 transitions, 399 flow, removed 9 selfloop flow, removed 1 redundant places. [2023-11-29 05:02:38,408 INFO L231 Difference]: Finished difference. Result has 43 places, 44 transitions, 192 flow [2023-11-29 05:02:38,409 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=172, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=192, PETRI_PLACES=43, PETRI_TRANSITIONS=44} [2023-11-29 05:02:38,409 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 10 predicate places. [2023-11-29 05:02:38,410 INFO L495 AbstractCegarLoop]: Abstraction has has 43 places, 44 transitions, 192 flow [2023-11-29 05:02:38,410 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 10.5) internal successors, (42), 4 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:02:38,410 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 05:02:38,410 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:02:38,416 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91e2605f-eff2-4533-a1b2-a84cc5102bbd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-11-29 05:02:38,610 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91e2605f-eff2-4533-a1b2-a84cc5102bbd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:02:38,611 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-29 05:02:38,611 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:02:38,611 INFO L85 PathProgramCache]: Analyzing trace with hash 1266254996, now seen corresponding path program 3 times [2023-11-29 05:02:38,612 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:02:38,612 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1986818130] [2023-11-29 05:02:38,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:02:38,612 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:02:38,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:02:38,867 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-11-29 05:02:38,867 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:02:38,867 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1986818130] [2023-11-29 05:02:38,868 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1986818130] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 05:02:38,868 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [126498297] [2023-11-29 05:02:38,868 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-29 05:02:38,868 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:02:38,868 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91e2605f-eff2-4533-a1b2-a84cc5102bbd/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:02:38,869 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91e2605f-eff2-4533-a1b2-a84cc5102bbd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:02:38,875 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91e2605f-eff2-4533-a1b2-a84cc5102bbd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-29 05:02:39,030 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2023-11-29 05:02:39,030 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 05:02:39,032 INFO L262 TraceCheckSpWp]: Trace formula consists of 284 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-29 05:02:39,035 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:02:39,078 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2023-11-29 05:02:39,079 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 05:02:39,079 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [126498297] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 05:02:39,079 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-29 05:02:39,079 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [7] total 9 [2023-11-29 05:02:39,080 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [8112751] [2023-11-29 05:02:39,080 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 05:02:39,080 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-29 05:02:39,081 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:02:39,081 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-29 05:02:39,081 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2023-11-29 05:02:39,082 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 33 [2023-11-29 05:02:39,082 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 44 transitions, 192 flow. Second operand has 4 states, 4 states have (on average 10.5) internal successors, (42), 4 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:02:39,082 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 05:02:39,082 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 33 [2023-11-29 05:02:39,082 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 05:02:39,373 INFO L124 PetriNetUnfolderBase]: 625/943 cut-off events. [2023-11-29 05:02:39,374 INFO L125 PetriNetUnfolderBase]: For 473/473 co-relation queries the response was YES. [2023-11-29 05:02:39,376 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2479 conditions, 943 events. 625/943 cut-off events. For 473/473 co-relation queries the response was YES. Maximal size of possible extension queue 49. Compared 3365 event pairs, 110 based on Foata normal form. 24/835 useless extension candidates. Maximal degree in co-relation 2399. Up to 652 conditions per place. [2023-11-29 05:02:39,381 INFO L140 encePairwiseOnDemand]: 27/33 looper letters, 61 selfloop transitions, 5 changer transitions 1/68 dead transitions. [2023-11-29 05:02:39,381 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 68 transitions, 406 flow [2023-11-29 05:02:39,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-29 05:02:39,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-29 05:02:39,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 65 transitions. [2023-11-29 05:02:39,383 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49242424242424243 [2023-11-29 05:02:39,383 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 65 transitions. [2023-11-29 05:02:39,383 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 65 transitions. [2023-11-29 05:02:39,383 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 05:02:39,383 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 65 transitions. [2023-11-29 05:02:39,384 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 16.25) internal successors, (65), 4 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:02:39,385 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 33.0) internal successors, (165), 5 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:02:39,385 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 33.0) internal successors, (165), 5 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:02:39,385 INFO L175 Difference]: Start difference. First operand has 43 places, 44 transitions, 192 flow. Second operand 4 states and 65 transitions. [2023-11-29 05:02:39,385 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 68 transitions, 406 flow [2023-11-29 05:02:39,388 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 68 transitions, 395 flow, removed 3 selfloop flow, removed 1 redundant places. [2023-11-29 05:02:39,389 INFO L231 Difference]: Finished difference. Result has 47 places, 46 transitions, 217 flow [2023-11-29 05:02:39,389 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=188, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=217, PETRI_PLACES=47, PETRI_TRANSITIONS=46} [2023-11-29 05:02:39,390 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 14 predicate places. [2023-11-29 05:02:39,390 INFO L495 AbstractCegarLoop]: Abstraction has has 47 places, 46 transitions, 217 flow [2023-11-29 05:02:39,391 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 10.5) internal successors, (42), 4 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:02:39,391 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 05:02:39,391 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:02:39,397 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91e2605f-eff2-4533-a1b2-a84cc5102bbd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-11-29 05:02:39,595 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91e2605f-eff2-4533-a1b2-a84cc5102bbd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:02:39,595 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-29 05:02:39,596 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:02:39,596 INFO L85 PathProgramCache]: Analyzing trace with hash 707335756, now seen corresponding path program 4 times [2023-11-29 05:02:39,596 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:02:39,596 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2147451048] [2023-11-29 05:02:39,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:02:39,596 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:02:39,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:02:39,846 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-11-29 05:02:39,847 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:02:39,847 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2147451048] [2023-11-29 05:02:39,847 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2147451048] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 05:02:39,847 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [746217626] [2023-11-29 05:02:39,847 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-29 05:02:39,848 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:02:39,848 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91e2605f-eff2-4533-a1b2-a84cc5102bbd/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:02:39,849 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91e2605f-eff2-4533-a1b2-a84cc5102bbd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:02:39,855 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91e2605f-eff2-4533-a1b2-a84cc5102bbd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-29 05:02:40,031 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-29 05:02:40,031 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 05:02:40,033 INFO L262 TraceCheckSpWp]: Trace formula consists of 407 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-29 05:02:40,036 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:02:40,126 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-11-29 05:02:40,127 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 05:02:40,205 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-11-29 05:02:40,205 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [746217626] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 05:02:40,205 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 05:02:40,205 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 17 [2023-11-29 05:02:40,206 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2073704749] [2023-11-29 05:02:40,206 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 05:02:40,206 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-11-29 05:02:40,207 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:02:40,207 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-11-29 05:02:40,208 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=166, Unknown=0, NotChecked=0, Total=272 [2023-11-29 05:02:40,208 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 33 [2023-11-29 05:02:40,209 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 46 transitions, 217 flow. Second operand has 17 states, 17 states have (on average 6.529411764705882) internal successors, (111), 17 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:02:40,209 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 05:02:40,209 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 33 [2023-11-29 05:02:40,209 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 05:02:40,547 INFO L124 PetriNetUnfolderBase]: 625/946 cut-off events. [2023-11-29 05:02:40,547 INFO L125 PetriNetUnfolderBase]: For 965/965 co-relation queries the response was YES. [2023-11-29 05:02:40,549 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2616 conditions, 946 events. 625/946 cut-off events. For 965/965 co-relation queries the response was YES. Maximal size of possible extension queue 51. Compared 3105 event pairs, 418 based on Foata normal form. 1/815 useless extension candidates. Maximal degree in co-relation 2521. Up to 930 conditions per place. [2023-11-29 05:02:40,555 INFO L140 encePairwiseOnDemand]: 26/33 looper letters, 30 selfloop transitions, 18 changer transitions 0/49 dead transitions. [2023-11-29 05:02:40,555 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 49 transitions, 331 flow [2023-11-29 05:02:40,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-29 05:02:40,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-11-29 05:02:40,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 74 transitions. [2023-11-29 05:02:40,556 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3203463203463203 [2023-11-29 05:02:40,557 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 74 transitions. [2023-11-29 05:02:40,557 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 74 transitions. [2023-11-29 05:02:40,557 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 05:02:40,557 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 74 transitions. [2023-11-29 05:02:40,558 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 10.571428571428571) internal successors, (74), 7 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:02:40,559 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 33.0) internal successors, (264), 8 states have internal predecessors, (264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:02:40,559 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 33.0) internal successors, (264), 8 states have internal predecessors, (264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:02:40,559 INFO L175 Difference]: Start difference. First operand has 47 places, 46 transitions, 217 flow. Second operand 7 states and 74 transitions. [2023-11-29 05:02:40,559 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 49 transitions, 331 flow [2023-11-29 05:02:40,562 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 49 transitions, 328 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-29 05:02:40,563 INFO L231 Difference]: Finished difference. Result has 53 places, 49 transitions, 282 flow [2023-11-29 05:02:40,563 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=214, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=282, PETRI_PLACES=53, PETRI_TRANSITIONS=49} [2023-11-29 05:02:40,564 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 20 predicate places. [2023-11-29 05:02:40,564 INFO L495 AbstractCegarLoop]: Abstraction has has 53 places, 49 transitions, 282 flow [2023-11-29 05:02:40,565 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 6.529411764705882) internal successors, (111), 17 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:02:40,565 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 05:02:40,565 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:02:40,571 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91e2605f-eff2-4533-a1b2-a84cc5102bbd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-11-29 05:02:40,771 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91e2605f-eff2-4533-a1b2-a84cc5102bbd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2023-11-29 05:02:40,772 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-29 05:02:40,772 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:02:40,772 INFO L85 PathProgramCache]: Analyzing trace with hash 1838598006, now seen corresponding path program 5 times [2023-11-29 05:02:40,772 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:02:40,772 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1965064450] [2023-11-29 05:02:40,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:02:40,772 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:02:40,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:02:41,120 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-11-29 05:02:41,121 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:02:41,121 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1965064450] [2023-11-29 05:02:41,121 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1965064450] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 05:02:41,122 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 05:02:41,122 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-29 05:02:41,122 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1971974442] [2023-11-29 05:02:41,122 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 05:02:41,123 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-29 05:02:41,123 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:02:41,123 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-29 05:02:41,124 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-29 05:02:41,124 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 33 [2023-11-29 05:02:41,124 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 49 transitions, 282 flow. Second operand has 5 states, 5 states have (on average 9.2) internal successors, (46), 5 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:02:41,124 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 05:02:41,124 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 33 [2023-11-29 05:02:41,124 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 05:02:41,595 INFO L124 PetriNetUnfolderBase]: 1105/1680 cut-off events. [2023-11-29 05:02:41,595 INFO L125 PetriNetUnfolderBase]: For 1329/1329 co-relation queries the response was YES. [2023-11-29 05:02:41,600 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4537 conditions, 1680 events. 1105/1680 cut-off events. For 1329/1329 co-relation queries the response was YES. Maximal size of possible extension queue 89. Compared 6976 event pairs, 406 based on Foata normal form. 20/1450 useless extension candidates. Maximal degree in co-relation 4422. Up to 979 conditions per place. [2023-11-29 05:02:41,609 INFO L140 encePairwiseOnDemand]: 28/33 looper letters, 78 selfloop transitions, 3 changer transitions 16/98 dead transitions. [2023-11-29 05:02:41,609 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 98 transitions, 663 flow [2023-11-29 05:02:41,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-29 05:02:41,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-29 05:02:41,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 87 transitions. [2023-11-29 05:02:41,611 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5272727272727272 [2023-11-29 05:02:41,611 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 87 transitions. [2023-11-29 05:02:41,611 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 87 transitions. [2023-11-29 05:02:41,611 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 05:02:41,611 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 87 transitions. [2023-11-29 05:02:41,612 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 17.4) internal successors, (87), 5 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:02:41,613 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 33.0) internal successors, (198), 6 states have internal predecessors, (198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:02:41,613 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 33.0) internal successors, (198), 6 states have internal predecessors, (198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:02:41,613 INFO L175 Difference]: Start difference. First operand has 53 places, 49 transitions, 282 flow. Second operand 5 states and 87 transitions. [2023-11-29 05:02:41,613 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 98 transitions, 663 flow [2023-11-29 05:02:41,617 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 98 transitions, 627 flow, removed 6 selfloop flow, removed 4 redundant places. [2023-11-29 05:02:41,619 INFO L231 Difference]: Finished difference. Result has 56 places, 51 transitions, 268 flow [2023-11-29 05:02:41,619 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=246, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=268, PETRI_PLACES=56, PETRI_TRANSITIONS=51} [2023-11-29 05:02:41,620 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 23 predicate places. [2023-11-29 05:02:41,620 INFO L495 AbstractCegarLoop]: Abstraction has has 56 places, 51 transitions, 268 flow [2023-11-29 05:02:41,620 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.2) internal successors, (46), 5 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:02:41,621 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 05:02:41,621 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:02:41,621 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-11-29 05:02:41,621 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-29 05:02:41,621 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:02:41,621 INFO L85 PathProgramCache]: Analyzing trace with hash -80311858, now seen corresponding path program 6 times [2023-11-29 05:02:41,622 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:02:41,622 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [777324409] [2023-11-29 05:02:41,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:02:41,622 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:02:41,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:02:41,924 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2023-11-29 05:02:41,924 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:02:41,925 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [777324409] [2023-11-29 05:02:41,925 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [777324409] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 05:02:41,925 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 05:02:41,925 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-29 05:02:41,925 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1056397222] [2023-11-29 05:02:41,926 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 05:02:41,926 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-29 05:02:41,926 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:02:41,927 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-29 05:02:41,927 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-29 05:02:41,927 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 33 [2023-11-29 05:02:41,927 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 51 transitions, 268 flow. Second operand has 4 states, 4 states have (on average 10.5) internal successors, (42), 4 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:02:41,928 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 05:02:41,928 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 33 [2023-11-29 05:02:41,928 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 05:02:42,289 INFO L124 PetriNetUnfolderBase]: 843/1260 cut-off events. [2023-11-29 05:02:42,289 INFO L125 PetriNetUnfolderBase]: For 1833/1833 co-relation queries the response was YES. [2023-11-29 05:02:42,293 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4013 conditions, 1260 events. 843/1260 cut-off events. For 1833/1833 co-relation queries the response was YES. Maximal size of possible extension queue 66. Compared 4674 event pairs, 352 based on Foata normal form. 48/1176 useless extension candidates. Maximal degree in co-relation 3912. Up to 885 conditions per place. [2023-11-29 05:02:42,300 INFO L140 encePairwiseOnDemand]: 29/33 looper letters, 69 selfloop transitions, 6 changer transitions 3/79 dead transitions. [2023-11-29 05:02:42,300 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 79 transitions, 535 flow [2023-11-29 05:02:42,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-29 05:02:42,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-29 05:02:42,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 69 transitions. [2023-11-29 05:02:42,301 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5227272727272727 [2023-11-29 05:02:42,301 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 69 transitions. [2023-11-29 05:02:42,301 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 69 transitions. [2023-11-29 05:02:42,301 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 05:02:42,301 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 69 transitions. [2023-11-29 05:02:42,302 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 17.25) internal successors, (69), 4 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:02:42,302 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 33.0) internal successors, (165), 5 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:02:42,302 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 33.0) internal successors, (165), 5 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:02:42,303 INFO L175 Difference]: Start difference. First operand has 56 places, 51 transitions, 268 flow. Second operand 4 states and 69 transitions. [2023-11-29 05:02:42,303 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 79 transitions, 535 flow [2023-11-29 05:02:42,307 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 79 transitions, 518 flow, removed 6 selfloop flow, removed 2 redundant places. [2023-11-29 05:02:42,308 INFO L231 Difference]: Finished difference. Result has 57 places, 52 transitions, 285 flow [2023-11-29 05:02:42,309 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=262, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=285, PETRI_PLACES=57, PETRI_TRANSITIONS=52} [2023-11-29 05:02:42,309 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 24 predicate places. [2023-11-29 05:02:42,310 INFO L495 AbstractCegarLoop]: Abstraction has has 57 places, 52 transitions, 285 flow [2023-11-29 05:02:42,310 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 10.5) internal successors, (42), 4 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:02:42,310 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 05:02:42,310 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:02:42,310 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-11-29 05:02:42,311 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-29 05:02:42,311 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:02:42,311 INFO L85 PathProgramCache]: Analyzing trace with hash -897593779, now seen corresponding path program 1 times [2023-11-29 05:02:42,311 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:02:42,311 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [86244080] [2023-11-29 05:02:42,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:02:42,312 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:02:42,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:02:42,595 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-11-29 05:02:42,595 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:02:42,596 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [86244080] [2023-11-29 05:02:42,596 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [86244080] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 05:02:42,596 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 05:02:42,596 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-29 05:02:42,596 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1873910639] [2023-11-29 05:02:42,596 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 05:02:42,596 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-29 05:02:42,597 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:02:42,597 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-29 05:02:42,597 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-29 05:02:42,597 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 33 [2023-11-29 05:02:42,598 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 52 transitions, 285 flow. Second operand has 5 states, 5 states have (on average 9.4) internal successors, (47), 5 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:02:42,598 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 05:02:42,598 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 33 [2023-11-29 05:02:42,598 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 05:02:43,061 INFO L124 PetriNetUnfolderBase]: 920/1366 cut-off events. [2023-11-29 05:02:43,061 INFO L125 PetriNetUnfolderBase]: For 2281/2281 co-relation queries the response was YES. [2023-11-29 05:02:43,066 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4419 conditions, 1366 events. 920/1366 cut-off events. For 2281/2281 co-relation queries the response was YES. Maximal size of possible extension queue 75. Compared 5167 event pairs, 293 based on Foata normal form. 14/1240 useless extension candidates. Maximal degree in co-relation 4318. Up to 763 conditions per place. [2023-11-29 05:02:43,073 INFO L140 encePairwiseOnDemand]: 28/33 looper letters, 73 selfloop transitions, 6 changer transitions 14/94 dead transitions. [2023-11-29 05:02:43,074 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 94 transitions, 651 flow [2023-11-29 05:02:43,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-29 05:02:43,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-29 05:02:43,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 86 transitions. [2023-11-29 05:02:43,075 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5212121212121212 [2023-11-29 05:02:43,075 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 86 transitions. [2023-11-29 05:02:43,075 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 86 transitions. [2023-11-29 05:02:43,075 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 05:02:43,075 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 86 transitions. [2023-11-29 05:02:43,076 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 17.2) internal successors, (86), 5 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:02:43,076 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 33.0) internal successors, (198), 6 states have internal predecessors, (198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:02:43,077 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 33.0) internal successors, (198), 6 states have internal predecessors, (198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:02:43,077 INFO L175 Difference]: Start difference. First operand has 57 places, 52 transitions, 285 flow. Second operand 5 states and 86 transitions. [2023-11-29 05:02:43,077 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 94 transitions, 651 flow [2023-11-29 05:02:43,081 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 94 transitions, 611 flow, removed 6 selfloop flow, removed 3 redundant places. [2023-11-29 05:02:43,083 INFO L231 Difference]: Finished difference. Result has 60 places, 55 transitions, 309 flow [2023-11-29 05:02:43,083 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=269, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=52, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=309, PETRI_PLACES=60, PETRI_TRANSITIONS=55} [2023-11-29 05:02:43,084 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 27 predicate places. [2023-11-29 05:02:43,084 INFO L495 AbstractCegarLoop]: Abstraction has has 60 places, 55 transitions, 309 flow [2023-11-29 05:02:43,085 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.4) internal successors, (47), 5 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:02:43,085 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 05:02:43,085 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:02:43,085 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-11-29 05:02:43,085 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-29 05:02:43,086 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:02:43,086 INFO L85 PathProgramCache]: Analyzing trace with hash 208249095, now seen corresponding path program 2 times [2023-11-29 05:02:43,086 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:02:43,086 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [693584586] [2023-11-29 05:02:43,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:02:43,087 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:02:43,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:02:43,378 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2023-11-29 05:02:43,378 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:02:43,378 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [693584586] [2023-11-29 05:02:43,378 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [693584586] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 05:02:43,378 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [647013845] [2023-11-29 05:02:43,378 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 05:02:43,379 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:02:43,379 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91e2605f-eff2-4533-a1b2-a84cc5102bbd/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:02:43,380 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91e2605f-eff2-4533-a1b2-a84cc5102bbd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:02:43,383 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91e2605f-eff2-4533-a1b2-a84cc5102bbd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-29 05:02:43,593 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-29 05:02:43,593 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 05:02:43,596 INFO L262 TraceCheckSpWp]: Trace formula consists of 449 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-29 05:02:43,599 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:02:43,642 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2023-11-29 05:02:43,642 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 05:02:43,702 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2023-11-29 05:02:43,702 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [647013845] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-29 05:02:43,702 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-11-29 05:02:43,703 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5, 5] total 8 [2023-11-29 05:02:43,703 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1840881903] [2023-11-29 05:02:43,703 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 05:02:43,703 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-29 05:02:43,704 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:02:43,704 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-29 05:02:43,704 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2023-11-29 05:02:43,704 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 33 [2023-11-29 05:02:43,705 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 55 transitions, 309 flow. Second operand has 5 states, 5 states have (on average 9.4) internal successors, (47), 5 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:02:43,705 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 05:02:43,705 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 33 [2023-11-29 05:02:43,705 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 05:02:44,092 INFO L124 PetriNetUnfolderBase]: 930/1371 cut-off events. [2023-11-29 05:02:44,092 INFO L125 PetriNetUnfolderBase]: For 2500/2500 co-relation queries the response was YES. [2023-11-29 05:02:44,097 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4657 conditions, 1371 events. 930/1371 cut-off events. For 2500/2500 co-relation queries the response was YES. Maximal size of possible extension queue 74. Compared 4972 event pairs, 155 based on Foata normal form. 24/1255 useless extension candidates. Maximal degree in co-relation 4554. Up to 515 conditions per place. [2023-11-29 05:02:44,106 INFO L140 encePairwiseOnDemand]: 26/33 looper letters, 91 selfloop transitions, 9 changer transitions 3/104 dead transitions. [2023-11-29 05:02:44,106 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 104 transitions, 752 flow [2023-11-29 05:02:44,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-29 05:02:44,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-29 05:02:44,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 83 transitions. [2023-11-29 05:02:44,107 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.503030303030303 [2023-11-29 05:02:44,107 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 83 transitions. [2023-11-29 05:02:44,107 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 83 transitions. [2023-11-29 05:02:44,108 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 05:02:44,108 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 83 transitions. [2023-11-29 05:02:44,108 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 16.6) internal successors, (83), 5 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:02:44,109 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 33.0) internal successors, (198), 6 states have internal predecessors, (198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:02:44,109 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 33.0) internal successors, (198), 6 states have internal predecessors, (198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:02:44,109 INFO L175 Difference]: Start difference. First operand has 60 places, 55 transitions, 309 flow. Second operand 5 states and 83 transitions. [2023-11-29 05:02:44,109 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 104 transitions, 752 flow [2023-11-29 05:02:44,116 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 104 transitions, 737 flow, removed 2 selfloop flow, removed 2 redundant places. [2023-11-29 05:02:44,118 INFO L231 Difference]: Finished difference. Result has 63 places, 58 transitions, 362 flow [2023-11-29 05:02:44,118 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=301, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=362, PETRI_PLACES=63, PETRI_TRANSITIONS=58} [2023-11-29 05:02:44,119 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 30 predicate places. [2023-11-29 05:02:44,119 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 58 transitions, 362 flow [2023-11-29 05:02:44,119 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.4) internal successors, (47), 5 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:02:44,119 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 05:02:44,120 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:02:44,126 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91e2605f-eff2-4533-a1b2-a84cc5102bbd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-11-29 05:02:44,322 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91e2605f-eff2-4533-a1b2-a84cc5102bbd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-11-29 05:02:44,323 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-29 05:02:44,323 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:02:44,323 INFO L85 PathProgramCache]: Analyzing trace with hash -36227667, now seen corresponding path program 3 times [2023-11-29 05:02:44,323 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:02:44,323 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1953651242] [2023-11-29 05:02:44,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:02:44,324 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:02:44,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:02:44,540 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2023-11-29 05:02:44,540 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:02:44,541 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1953651242] [2023-11-29 05:02:44,541 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1953651242] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 05:02:44,541 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1354571696] [2023-11-29 05:02:44,541 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-29 05:02:44,541 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:02:44,541 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91e2605f-eff2-4533-a1b2-a84cc5102bbd/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:02:44,542 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91e2605f-eff2-4533-a1b2-a84cc5102bbd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:02:44,545 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91e2605f-eff2-4533-a1b2-a84cc5102bbd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-29 05:02:44,906 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-11-29 05:02:44,906 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 05:02:44,908 INFO L262 TraceCheckSpWp]: Trace formula consists of 368 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-29 05:02:44,910 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:02:44,963 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2023-11-29 05:02:44,963 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 05:02:45,072 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2023-11-29 05:02:45,072 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1354571696] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-29 05:02:45,072 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-11-29 05:02:45,073 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5, 5] total 11 [2023-11-29 05:02:45,073 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [646755427] [2023-11-29 05:02:45,073 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 05:02:45,073 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-29 05:02:45,074 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:02:45,074 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-29 05:02:45,074 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2023-11-29 05:02:45,075 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 33 [2023-11-29 05:02:45,075 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 58 transitions, 362 flow. Second operand has 5 states, 5 states have (on average 9.4) internal successors, (47), 5 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:02:45,075 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 05:02:45,075 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 33 [2023-11-29 05:02:45,075 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 05:02:45,467 INFO L124 PetriNetUnfolderBase]: 988/1453 cut-off events. [2023-11-29 05:02:45,467 INFO L125 PetriNetUnfolderBase]: For 3293/3293 co-relation queries the response was YES. [2023-11-29 05:02:45,471 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5089 conditions, 1453 events. 988/1453 cut-off events. For 3293/3293 co-relation queries the response was YES. Maximal size of possible extension queue 83. Compared 5412 event pairs, 301 based on Foata normal form. 24/1333 useless extension candidates. Maximal degree in co-relation 4984. Up to 811 conditions per place. [2023-11-29 05:02:45,480 INFO L140 encePairwiseOnDemand]: 28/33 looper letters, 83 selfloop transitions, 10 changer transitions 1/95 dead transitions. [2023-11-29 05:02:45,480 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 95 transitions, 695 flow [2023-11-29 05:02:45,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-29 05:02:45,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-29 05:02:45,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 84 transitions. [2023-11-29 05:02:45,481 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.509090909090909 [2023-11-29 05:02:45,481 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 84 transitions. [2023-11-29 05:02:45,481 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 84 transitions. [2023-11-29 05:02:45,481 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 05:02:45,481 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 84 transitions. [2023-11-29 05:02:45,482 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 16.8) internal successors, (84), 5 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:02:45,483 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 33.0) internal successors, (198), 6 states have internal predecessors, (198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:02:45,483 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 33.0) internal successors, (198), 6 states have internal predecessors, (198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:02:45,483 INFO L175 Difference]: Start difference. First operand has 63 places, 58 transitions, 362 flow. Second operand 5 states and 84 transitions. [2023-11-29 05:02:45,483 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 95 transitions, 695 flow [2023-11-29 05:02:45,488 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 95 transitions, 686 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-29 05:02:45,490 INFO L231 Difference]: Finished difference. Result has 66 places, 59 transitions, 384 flow [2023-11-29 05:02:45,490 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=354, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=384, PETRI_PLACES=66, PETRI_TRANSITIONS=59} [2023-11-29 05:02:45,491 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 33 predicate places. [2023-11-29 05:02:45,491 INFO L495 AbstractCegarLoop]: Abstraction has has 66 places, 59 transitions, 384 flow [2023-11-29 05:02:45,491 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.4) internal successors, (47), 5 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:02:45,491 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 05:02:45,491 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:02:45,496 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91e2605f-eff2-4533-a1b2-a84cc5102bbd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2023-11-29 05:02:45,692 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91e2605f-eff2-4533-a1b2-a84cc5102bbd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-11-29 05:02:45,692 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-29 05:02:45,692 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:02:45,692 INFO L85 PathProgramCache]: Analyzing trace with hash -1473161755, now seen corresponding path program 4 times [2023-11-29 05:02:45,692 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:02:45,692 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1030003611] [2023-11-29 05:02:45,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:02:45,693 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:02:45,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:02:45,886 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2023-11-29 05:02:45,886 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:02:45,886 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1030003611] [2023-11-29 05:02:45,887 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1030003611] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 05:02:45,887 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 05:02:45,887 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-29 05:02:45,887 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1059351292] [2023-11-29 05:02:45,887 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 05:02:45,888 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-29 05:02:45,888 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:02:45,888 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-29 05:02:45,889 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-29 05:02:45,889 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 33 [2023-11-29 05:02:45,889 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 59 transitions, 384 flow. Second operand has 5 states, 5 states have (on average 9.4) internal successors, (47), 5 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:02:45,889 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 05:02:45,889 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 33 [2023-11-29 05:02:45,889 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 05:02:46,328 INFO L124 PetriNetUnfolderBase]: 974/1439 cut-off events. [2023-11-29 05:02:46,328 INFO L125 PetriNetUnfolderBase]: For 3823/3823 co-relation queries the response was YES. [2023-11-29 05:02:46,334 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5289 conditions, 1439 events. 974/1439 cut-off events. For 3823/3823 co-relation queries the response was YES. Maximal size of possible extension queue 82. Compared 5343 event pairs, 315 based on Foata normal form. 14/1309 useless extension candidates. Maximal degree in co-relation 5183. Up to 968 conditions per place. [2023-11-29 05:02:46,344 INFO L140 encePairwiseOnDemand]: 28/33 looper letters, 76 selfloop transitions, 8 changer transitions 16/101 dead transitions. [2023-11-29 05:02:46,344 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 101 transitions, 782 flow [2023-11-29 05:02:46,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-29 05:02:46,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-29 05:02:46,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 83 transitions. [2023-11-29 05:02:46,345 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.503030303030303 [2023-11-29 05:02:46,346 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 83 transitions. [2023-11-29 05:02:46,346 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 83 transitions. [2023-11-29 05:02:46,346 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 05:02:46,346 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 83 transitions. [2023-11-29 05:02:46,346 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 16.6) internal successors, (83), 5 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:02:46,347 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 33.0) internal successors, (198), 6 states have internal predecessors, (198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:02:46,347 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 33.0) internal successors, (198), 6 states have internal predecessors, (198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:02:46,347 INFO L175 Difference]: Start difference. First operand has 66 places, 59 transitions, 384 flow. Second operand 5 states and 83 transitions. [2023-11-29 05:02:46,348 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 101 transitions, 782 flow [2023-11-29 05:02:46,355 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 101 transitions, 754 flow, removed 1 selfloop flow, removed 3 redundant places. [2023-11-29 05:02:46,357 INFO L231 Difference]: Finished difference. Result has 69 places, 63 transitions, 436 flow [2023-11-29 05:02:46,358 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=362, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=436, PETRI_PLACES=69, PETRI_TRANSITIONS=63} [2023-11-29 05:02:46,358 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 36 predicate places. [2023-11-29 05:02:46,358 INFO L495 AbstractCegarLoop]: Abstraction has has 69 places, 63 transitions, 436 flow [2023-11-29 05:02:46,359 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.4) internal successors, (47), 5 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:02:46,359 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 05:02:46,359 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:02:46,359 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-11-29 05:02:46,360 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-29 05:02:46,360 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:02:46,360 INFO L85 PathProgramCache]: Analyzing trace with hash -1593966465, now seen corresponding path program 5 times [2023-11-29 05:02:46,360 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:02:46,360 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [841692867] [2023-11-29 05:02:46,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:02:46,361 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:02:46,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:02:46,615 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2023-11-29 05:02:46,615 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:02:46,616 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [841692867] [2023-11-29 05:02:46,616 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [841692867] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 05:02:46,616 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 05:02:46,616 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-29 05:02:46,616 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [848476356] [2023-11-29 05:02:46,616 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 05:02:46,616 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-29 05:02:46,617 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:02:46,617 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-29 05:02:46,617 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-29 05:02:46,618 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 33 [2023-11-29 05:02:46,618 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 63 transitions, 436 flow. Second operand has 5 states, 5 states have (on average 9.4) internal successors, (47), 5 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:02:46,618 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 05:02:46,618 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 33 [2023-11-29 05:02:46,618 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 05:02:46,962 INFO L124 PetriNetUnfolderBase]: 864/1269 cut-off events. [2023-11-29 05:02:46,962 INFO L125 PetriNetUnfolderBase]: For 3726/3726 co-relation queries the response was YES. [2023-11-29 05:02:46,968 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4727 conditions, 1269 events. 864/1269 cut-off events. For 3726/3726 co-relation queries the response was YES. Maximal size of possible extension queue 69. Compared 4507 event pairs, 259 based on Foata normal form. 24/1157 useless extension candidates. Maximal degree in co-relation 4619. Up to 806 conditions per place. [2023-11-29 05:02:46,976 INFO L140 encePairwiseOnDemand]: 28/33 looper letters, 85 selfloop transitions, 9 changer transitions 4/99 dead transitions. [2023-11-29 05:02:46,976 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 99 transitions, 777 flow [2023-11-29 05:02:46,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-29 05:02:46,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-29 05:02:46,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 81 transitions. [2023-11-29 05:02:46,977 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4909090909090909 [2023-11-29 05:02:46,978 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 81 transitions. [2023-11-29 05:02:46,978 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 81 transitions. [2023-11-29 05:02:46,978 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 05:02:46,978 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 81 transitions. [2023-11-29 05:02:46,979 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 16.2) internal successors, (81), 5 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:02:46,979 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 33.0) internal successors, (198), 6 states have internal predecessors, (198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:02:46,979 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 33.0) internal successors, (198), 6 states have internal predecessors, (198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:02:46,980 INFO L175 Difference]: Start difference. First operand has 69 places, 63 transitions, 436 flow. Second operand 5 states and 81 transitions. [2023-11-29 05:02:46,980 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 99 transitions, 777 flow [2023-11-29 05:02:46,990 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 99 transitions, 759 flow, removed 4 selfloop flow, removed 2 redundant places. [2023-11-29 05:02:46,992 INFO L231 Difference]: Finished difference. Result has 71 places, 63 transitions, 434 flow [2023-11-29 05:02:46,992 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=418, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=63, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=434, PETRI_PLACES=71, PETRI_TRANSITIONS=63} [2023-11-29 05:02:46,993 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 38 predicate places. [2023-11-29 05:02:46,993 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 63 transitions, 434 flow [2023-11-29 05:02:46,993 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.4) internal successors, (47), 5 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:02:46,993 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 05:02:46,993 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:02:46,994 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-11-29 05:02:46,994 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-29 05:02:46,994 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:02:46,994 INFO L85 PathProgramCache]: Analyzing trace with hash -617366413, now seen corresponding path program 1 times [2023-11-29 05:02:46,994 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:02:46,994 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [932879832] [2023-11-29 05:02:46,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:02:46,995 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:02:47,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:02:48,309 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-11-29 05:02:48,309 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:02:48,309 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [932879832] [2023-11-29 05:02:48,309 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [932879832] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 05:02:48,310 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1855821675] [2023-11-29 05:02:48,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:02:48,310 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:02:48,310 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91e2605f-eff2-4533-a1b2-a84cc5102bbd/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:02:48,311 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91e2605f-eff2-4533-a1b2-a84cc5102bbd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:02:48,315 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91e2605f-eff2-4533-a1b2-a84cc5102bbd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-29 05:02:48,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:02:48,525 INFO L262 TraceCheckSpWp]: Trace formula consists of 464 conjuncts, 36 conjunts are in the unsatisfiable core [2023-11-29 05:02:48,528 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:02:48,885 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 05:02:48,885 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 40 treesize of output 40 [2023-11-29 05:02:48,936 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-11-29 05:02:48,936 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 05:02:49,448 INFO L349 Elim1Store]: treesize reduction 32, result has 73.6 percent of original size [2023-11-29 05:02:49,448 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 46 treesize of output 102 [2023-11-29 05:02:49,628 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-11-29 05:02:49,628 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1855821675] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 05:02:49,628 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 05:02:49,628 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 9] total 24 [2023-11-29 05:02:49,629 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1574542245] [2023-11-29 05:02:49,629 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 05:02:49,629 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-11-29 05:02:49,630 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:02:49,630 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-11-29 05:02:49,631 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=473, Unknown=0, NotChecked=0, Total=552 [2023-11-29 05:02:49,631 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 33 [2023-11-29 05:02:49,631 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 63 transitions, 434 flow. Second operand has 24 states, 24 states have (on average 6.5) internal successors, (156), 24 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:02:49,631 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 05:02:49,632 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 33 [2023-11-29 05:02:49,632 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 05:02:51,330 INFO L124 PetriNetUnfolderBase]: 1997/2916 cut-off events. [2023-11-29 05:02:51,330 INFO L125 PetriNetUnfolderBase]: For 6854/6854 co-relation queries the response was YES. [2023-11-29 05:02:51,376 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10411 conditions, 2916 events. 1997/2916 cut-off events. For 6854/6854 co-relation queries the response was YES. Maximal size of possible extension queue 152. Compared 12828 event pairs, 166 based on Foata normal form. 1/2499 useless extension candidates. Maximal degree in co-relation 10302. Up to 928 conditions per place. [2023-11-29 05:02:51,392 INFO L140 encePairwiseOnDemand]: 22/33 looper letters, 157 selfloop transitions, 65 changer transitions 9/232 dead transitions. [2023-11-29 05:02:51,392 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 86 places, 232 transitions, 1809 flow [2023-11-29 05:02:51,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-11-29 05:02:51,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2023-11-29 05:02:51,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 232 transitions. [2023-11-29 05:02:51,394 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41354723707664887 [2023-11-29 05:02:51,394 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 232 transitions. [2023-11-29 05:02:51,394 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 232 transitions. [2023-11-29 05:02:51,394 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 05:02:51,395 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 232 transitions. [2023-11-29 05:02:51,396 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 13.647058823529411) internal successors, (232), 17 states have internal predecessors, (232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:02:51,397 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 33.0) internal successors, (594), 18 states have internal predecessors, (594), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:02:51,398 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 33.0) internal successors, (594), 18 states have internal predecessors, (594), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:02:51,398 INFO L175 Difference]: Start difference. First operand has 71 places, 63 transitions, 434 flow. Second operand 17 states and 232 transitions. [2023-11-29 05:02:51,398 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 86 places, 232 transitions, 1809 flow [2023-11-29 05:02:51,414 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 232 transitions, 1657 flow, removed 12 selfloop flow, removed 6 redundant places. [2023-11-29 05:02:51,418 INFO L231 Difference]: Finished difference. Result has 88 places, 124 transitions, 1078 flow [2023-11-29 05:02:51,419 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=398, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=63, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=1078, PETRI_PLACES=88, PETRI_TRANSITIONS=124} [2023-11-29 05:02:51,419 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 55 predicate places. [2023-11-29 05:02:51,419 INFO L495 AbstractCegarLoop]: Abstraction has has 88 places, 124 transitions, 1078 flow [2023-11-29 05:02:51,420 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 6.5) internal successors, (156), 24 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:02:51,420 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 05:02:51,420 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:02:51,426 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91e2605f-eff2-4533-a1b2-a84cc5102bbd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2023-11-29 05:02:51,620 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91e2605f-eff2-4533-a1b2-a84cc5102bbd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-11-29 05:02:51,621 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-29 05:02:51,621 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:02:51,621 INFO L85 PathProgramCache]: Analyzing trace with hash -1347741755, now seen corresponding path program 2 times [2023-11-29 05:02:51,621 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:02:51,621 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1672772254] [2023-11-29 05:02:51,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:02:51,621 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:02:51,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:02:52,844 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-11-29 05:02:52,844 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:02:52,844 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1672772254] [2023-11-29 05:02:52,844 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1672772254] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 05:02:52,844 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [412678504] [2023-11-29 05:02:52,844 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 05:02:52,844 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:02:52,845 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91e2605f-eff2-4533-a1b2-a84cc5102bbd/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:02:52,845 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91e2605f-eff2-4533-a1b2-a84cc5102bbd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:02:52,848 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91e2605f-eff2-4533-a1b2-a84cc5102bbd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-29 05:02:53,069 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-29 05:02:53,069 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 05:02:53,072 INFO L262 TraceCheckSpWp]: Trace formula consists of 464 conjuncts, 32 conjunts are in the unsatisfiable core [2023-11-29 05:02:53,074 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:02:53,514 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 05:02:53,514 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 59 treesize of output 75 [2023-11-29 05:02:53,626 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-11-29 05:02:53,626 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 05:02:54,079 INFO L349 Elim1Store]: treesize reduction 32, result has 73.6 percent of original size [2023-11-29 05:02:54,080 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 46 treesize of output 102 [2023-11-29 05:02:54,263 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-11-29 05:02:54,264 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [412678504] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 05:02:54,264 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 05:02:54,264 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 9] total 29 [2023-11-29 05:02:54,264 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1412866565] [2023-11-29 05:02:54,264 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 05:02:54,264 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2023-11-29 05:02:54,265 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:02:54,265 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2023-11-29 05:02:54,266 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=699, Unknown=0, NotChecked=0, Total=812 [2023-11-29 05:02:54,266 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 33 [2023-11-29 05:02:54,267 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 124 transitions, 1078 flow. Second operand has 29 states, 29 states have (on average 6.413793103448276) internal successors, (186), 29 states have internal predecessors, (186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:02:54,267 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 05:02:54,267 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 33 [2023-11-29 05:02:54,267 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 05:02:56,208 INFO L124 PetriNetUnfolderBase]: 2325/3396 cut-off events. [2023-11-29 05:02:56,208 INFO L125 PetriNetUnfolderBase]: For 11669/11669 co-relation queries the response was YES. [2023-11-29 05:02:56,220 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13791 conditions, 3396 events. 2325/3396 cut-off events. For 11669/11669 co-relation queries the response was YES. Maximal size of possible extension queue 182. Compared 15364 event pairs, 254 based on Foata normal form. 1/3397 useless extension candidates. Maximal degree in co-relation 13674. Up to 1135 conditions per place. [2023-11-29 05:02:56,235 INFO L140 encePairwiseOnDemand]: 22/33 looper letters, 160 selfloop transitions, 81 changer transitions 46/288 dead transitions. [2023-11-29 05:02:56,236 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 108 places, 288 transitions, 2445 flow [2023-11-29 05:02:56,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-11-29 05:02:56,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2023-11-29 05:02:56,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 283 transitions. [2023-11-29 05:02:56,237 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4083694083694084 [2023-11-29 05:02:56,237 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 283 transitions. [2023-11-29 05:02:56,238 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 283 transitions. [2023-11-29 05:02:56,238 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 05:02:56,238 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 283 transitions. [2023-11-29 05:02:56,239 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 13.476190476190476) internal successors, (283), 21 states have internal predecessors, (283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:02:56,241 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 33.0) internal successors, (726), 22 states have internal predecessors, (726), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:02:56,241 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 33.0) internal successors, (726), 22 states have internal predecessors, (726), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:02:56,241 INFO L175 Difference]: Start difference. First operand has 88 places, 124 transitions, 1078 flow. Second operand 21 states and 283 transitions. [2023-11-29 05:02:56,241 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 108 places, 288 transitions, 2445 flow [2023-11-29 05:02:56,305 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 106 places, 288 transitions, 2402 flow, removed 20 selfloop flow, removed 2 redundant places. [2023-11-29 05:02:56,309 INFO L231 Difference]: Finished difference. Result has 114 places, 144 transitions, 1461 flow [2023-11-29 05:02:56,310 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=1039, PETRI_DIFFERENCE_MINUEND_PLACES=86, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=124, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=62, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=1461, PETRI_PLACES=114, PETRI_TRANSITIONS=144} [2023-11-29 05:02:56,310 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 81 predicate places. [2023-11-29 05:02:56,310 INFO L495 AbstractCegarLoop]: Abstraction has has 114 places, 144 transitions, 1461 flow [2023-11-29 05:02:56,311 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 6.413793103448276) internal successors, (186), 29 states have internal predecessors, (186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:02:56,311 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 05:02:56,311 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:02:56,317 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91e2605f-eff2-4533-a1b2-a84cc5102bbd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2023-11-29 05:02:56,511 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91e2605f-eff2-4533-a1b2-a84cc5102bbd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-11-29 05:02:56,512 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-29 05:02:56,512 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:02:56,512 INFO L85 PathProgramCache]: Analyzing trace with hash -1280045217, now seen corresponding path program 3 times [2023-11-29 05:02:56,512 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:02:56,512 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [559889318] [2023-11-29 05:02:56,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:02:56,512 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:02:56,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:02:57,505 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-11-29 05:02:57,505 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:02:57,505 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [559889318] [2023-11-29 05:02:57,505 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [559889318] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 05:02:57,506 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [606618877] [2023-11-29 05:02:57,506 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-29 05:02:57,506 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:02:57,506 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91e2605f-eff2-4533-a1b2-a84cc5102bbd/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:02:57,507 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91e2605f-eff2-4533-a1b2-a84cc5102bbd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:02:57,511 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91e2605f-eff2-4533-a1b2-a84cc5102bbd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-29 05:02:57,731 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-11-29 05:02:57,731 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 05:02:57,734 INFO L262 TraceCheckSpWp]: Trace formula consists of 383 conjuncts, 34 conjunts are in the unsatisfiable core [2023-11-29 05:02:57,737 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:02:57,934 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 05:02:57,935 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 40 treesize of output 40 [2023-11-29 05:02:58,012 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-11-29 05:02:58,012 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 05:02:58,399 INFO L349 Elim1Store]: treesize reduction 32, result has 73.6 percent of original size [2023-11-29 05:02:58,399 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 46 treesize of output 102 [2023-11-29 05:02:58,549 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-11-29 05:02:58,550 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [606618877] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 05:02:58,550 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 05:02:58,550 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 9] total 25 [2023-11-29 05:02:58,550 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1898309816] [2023-11-29 05:02:58,551 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 05:02:58,551 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-11-29 05:02:58,552 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:02:58,552 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-11-29 05:02:58,553 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=513, Unknown=0, NotChecked=0, Total=600 [2023-11-29 05:02:58,553 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 33 [2023-11-29 05:02:58,553 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 114 places, 144 transitions, 1461 flow. Second operand has 25 states, 25 states have (on average 6.64) internal successors, (166), 25 states have internal predecessors, (166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:02:58,553 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 05:02:58,553 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 33 [2023-11-29 05:02:58,554 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 05:03:00,155 INFO L124 PetriNetUnfolderBase]: 2080/3047 cut-off events. [2023-11-29 05:03:00,155 INFO L125 PetriNetUnfolderBase]: For 22763/22763 co-relation queries the response was YES. [2023-11-29 05:03:00,167 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16511 conditions, 3047 events. 2080/3047 cut-off events. For 22763/22763 co-relation queries the response was YES. Maximal size of possible extension queue 159. Compared 13478 event pairs, 341 based on Foata normal form. 1/3048 useless extension candidates. Maximal degree in co-relation 16386. Up to 1182 conditions per place. [2023-11-29 05:03:00,180 INFO L140 encePairwiseOnDemand]: 22/33 looper letters, 157 selfloop transitions, 75 changer transitions 3/236 dead transitions. [2023-11-29 05:03:00,180 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 126 places, 236 transitions, 2434 flow [2023-11-29 05:03:00,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-11-29 05:03:00,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2023-11-29 05:03:00,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 206 transitions. [2023-11-29 05:03:00,182 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39015151515151514 [2023-11-29 05:03:00,182 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 206 transitions. [2023-11-29 05:03:00,182 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 206 transitions. [2023-11-29 05:03:00,182 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 05:03:00,182 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 206 transitions. [2023-11-29 05:03:00,183 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 12.875) internal successors, (206), 16 states have internal predecessors, (206), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:03:00,185 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 33.0) internal successors, (561), 17 states have internal predecessors, (561), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:03:00,185 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 33.0) internal successors, (561), 17 states have internal predecessors, (561), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:03:00,185 INFO L175 Difference]: Start difference. First operand has 114 places, 144 transitions, 1461 flow. Second operand 16 states and 206 transitions. [2023-11-29 05:03:00,185 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 126 places, 236 transitions, 2434 flow [2023-11-29 05:03:00,278 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 117 places, 236 transitions, 2300 flow, removed 36 selfloop flow, removed 9 redundant places. [2023-11-29 05:03:00,281 INFO L231 Difference]: Finished difference. Result has 119 places, 148 transitions, 1540 flow [2023-11-29 05:03:00,282 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=1337, PETRI_DIFFERENCE_MINUEND_PLACES=102, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=144, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=71, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=1540, PETRI_PLACES=119, PETRI_TRANSITIONS=148} [2023-11-29 05:03:00,282 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 86 predicate places. [2023-11-29 05:03:00,282 INFO L495 AbstractCegarLoop]: Abstraction has has 119 places, 148 transitions, 1540 flow [2023-11-29 05:03:00,283 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 6.64) internal successors, (166), 25 states have internal predecessors, (166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:03:00,283 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 05:03:00,283 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:03:00,289 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91e2605f-eff2-4533-a1b2-a84cc5102bbd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2023-11-29 05:03:00,483 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91e2605f-eff2-4533-a1b2-a84cc5102bbd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-11-29 05:03:00,483 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-29 05:03:00,484 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:03:00,484 INFO L85 PathProgramCache]: Analyzing trace with hash 879594951, now seen corresponding path program 4 times [2023-11-29 05:03:00,484 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:03:00,484 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [774260388] [2023-11-29 05:03:00,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:03:00,484 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:03:00,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:03:01,326 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-11-29 05:03:01,326 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:03:01,326 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [774260388] [2023-11-29 05:03:01,326 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [774260388] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 05:03:01,326 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1687094534] [2023-11-29 05:03:01,326 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-29 05:03:01,326 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:03:01,326 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91e2605f-eff2-4533-a1b2-a84cc5102bbd/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:03:01,327 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91e2605f-eff2-4533-a1b2-a84cc5102bbd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:03:01,328 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91e2605f-eff2-4533-a1b2-a84cc5102bbd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-11-29 05:03:01,518 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-29 05:03:01,518 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 05:03:01,521 INFO L262 TraceCheckSpWp]: Trace formula consists of 464 conjuncts, 36 conjunts are in the unsatisfiable core [2023-11-29 05:03:01,524 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:03:01,707 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 05:03:01,707 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 40 treesize of output 40 [2023-11-29 05:03:01,734 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-11-29 05:03:01,734 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 05:03:02,126 INFO L349 Elim1Store]: treesize reduction 32, result has 73.6 percent of original size [2023-11-29 05:03:02,126 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 46 treesize of output 102 [2023-11-29 05:03:02,304 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-11-29 05:03:02,304 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1687094534] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 05:03:02,304 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 05:03:02,304 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 9] total 23 [2023-11-29 05:03:02,305 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1192389115] [2023-11-29 05:03:02,305 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 05:03:02,305 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-11-29 05:03:02,305 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:03:02,306 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-11-29 05:03:02,306 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=431, Unknown=0, NotChecked=0, Total=506 [2023-11-29 05:03:02,306 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 33 [2023-11-29 05:03:02,307 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 119 places, 148 transitions, 1540 flow. Second operand has 23 states, 23 states have (on average 6.521739130434782) internal successors, (150), 23 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:03:02,307 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 05:03:02,307 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 33 [2023-11-29 05:03:02,307 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 05:03:04,143 INFO L124 PetriNetUnfolderBase]: 2096/3078 cut-off events. [2023-11-29 05:03:04,143 INFO L125 PetriNetUnfolderBase]: For 24409/24409 co-relation queries the response was YES. [2023-11-29 05:03:04,153 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17089 conditions, 3078 events. 2096/3078 cut-off events. For 24409/24409 co-relation queries the response was YES. Maximal size of possible extension queue 160. Compared 13696 event pairs, 327 based on Foata normal form. 1/3065 useless extension candidates. Maximal degree in co-relation 16962. Up to 1152 conditions per place. [2023-11-29 05:03:04,164 INFO L140 encePairwiseOnDemand]: 22/33 looper letters, 162 selfloop transitions, 85 changer transitions 3/251 dead transitions. [2023-11-29 05:03:04,164 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 137 places, 251 transitions, 2562 flow [2023-11-29 05:03:04,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-11-29 05:03:04,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2023-11-29 05:03:04,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 242 transitions. [2023-11-29 05:03:04,166 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38596491228070173 [2023-11-29 05:03:04,166 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 242 transitions. [2023-11-29 05:03:04,166 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 242 transitions. [2023-11-29 05:03:04,166 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 05:03:04,166 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 242 transitions. [2023-11-29 05:03:04,167 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 12.736842105263158) internal successors, (242), 19 states have internal predecessors, (242), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:03:04,168 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 33.0) internal successors, (660), 20 states have internal predecessors, (660), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:03:04,168 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 33.0) internal successors, (660), 20 states have internal predecessors, (660), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:03:04,168 INFO L175 Difference]: Start difference. First operand has 119 places, 148 transitions, 1540 flow. Second operand 19 states and 242 transitions. [2023-11-29 05:03:04,168 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 137 places, 251 transitions, 2562 flow [2023-11-29 05:03:04,217 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 125 places, 251 transitions, 2445 flow, removed 4 selfloop flow, removed 12 redundant places. [2023-11-29 05:03:04,221 INFO L231 Difference]: Finished difference. Result has 126 places, 150 transitions, 1624 flow [2023-11-29 05:03:04,221 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=1424, PETRI_DIFFERENCE_MINUEND_PLACES=107, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=148, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=83, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=1624, PETRI_PLACES=126, PETRI_TRANSITIONS=150} [2023-11-29 05:03:04,221 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 93 predicate places. [2023-11-29 05:03:04,221 INFO L495 AbstractCegarLoop]: Abstraction has has 126 places, 150 transitions, 1624 flow [2023-11-29 05:03:04,221 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 6.521739130434782) internal successors, (150), 23 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:03:04,221 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 05:03:04,222 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:03:04,227 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91e2605f-eff2-4533-a1b2-a84cc5102bbd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2023-11-29 05:03:04,422 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91e2605f-eff2-4533-a1b2-a84cc5102bbd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-11-29 05:03:04,422 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-29 05:03:04,422 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:03:04,423 INFO L85 PathProgramCache]: Analyzing trace with hash 1725020341, now seen corresponding path program 5 times [2023-11-29 05:03:04,423 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:03:04,423 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1739364475] [2023-11-29 05:03:04,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:03:04,423 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:03:04,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:03:05,457 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-11-29 05:03:05,457 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:03:05,457 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1739364475] [2023-11-29 05:03:05,457 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1739364475] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 05:03:05,457 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1548174976] [2023-11-29 05:03:05,457 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-29 05:03:05,457 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:03:05,457 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91e2605f-eff2-4533-a1b2-a84cc5102bbd/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:03:05,458 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91e2605f-eff2-4533-a1b2-a84cc5102bbd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:03:05,459 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91e2605f-eff2-4533-a1b2-a84cc5102bbd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-11-29 05:03:06,546 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2023-11-29 05:03:06,546 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 05:03:06,550 INFO L262 TraceCheckSpWp]: Trace formula consists of 464 conjuncts, 36 conjunts are in the unsatisfiable core [2023-11-29 05:03:06,552 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:03:06,797 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 05:03:06,797 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 40 treesize of output 40 [2023-11-29 05:03:06,817 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-11-29 05:03:06,818 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 05:03:07,209 INFO L349 Elim1Store]: treesize reduction 8, result has 96.1 percent of original size [2023-11-29 05:03:07,209 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 56 treesize of output 212 [2023-11-29 05:03:17,964 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-11-29 05:03:17,964 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1548174976] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 05:03:17,964 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 05:03:17,964 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 9] total 25 [2023-11-29 05:03:17,964 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1470714898] [2023-11-29 05:03:17,964 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 05:03:17,965 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-11-29 05:03:17,965 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:03:17,965 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-11-29 05:03:17,966 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=512, Unknown=0, NotChecked=0, Total=600 [2023-11-29 05:03:17,966 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 33 [2023-11-29 05:03:17,966 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 126 places, 150 transitions, 1624 flow. Second operand has 25 states, 25 states have (on average 6.44) internal successors, (161), 25 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:03:17,966 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 05:03:17,966 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 33 [2023-11-29 05:03:17,966 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 05:03:20,379 INFO L124 PetriNetUnfolderBase]: 3202/4649 cut-off events. [2023-11-29 05:03:20,379 INFO L125 PetriNetUnfolderBase]: For 44612/44612 co-relation queries the response was YES. [2023-11-29 05:03:20,396 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26973 conditions, 4649 events. 3202/4649 cut-off events. For 44612/44612 co-relation queries the response was YES. Maximal size of possible extension queue 251. Compared 22120 event pairs, 418 based on Foata normal form. 1/4650 useless extension candidates. Maximal degree in co-relation 26845. Up to 2704 conditions per place. [2023-11-29 05:03:20,413 INFO L140 encePairwiseOnDemand]: 22/33 looper letters, 195 selfloop transitions, 122 changer transitions 34/352 dead transitions. [2023-11-29 05:03:20,414 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 148 places, 352 transitions, 3916 flow [2023-11-29 05:03:20,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-11-29 05:03:20,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2023-11-29 05:03:20,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 295 transitions. [2023-11-29 05:03:20,415 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38866930171277997 [2023-11-29 05:03:20,415 INFO L72 ComplementDD]: Start complementDD. Operand 23 states and 295 transitions. [2023-11-29 05:03:20,415 INFO L73 IsDeterministic]: Start isDeterministic. Operand 23 states and 295 transitions. [2023-11-29 05:03:20,416 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 05:03:20,416 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 23 states and 295 transitions. [2023-11-29 05:03:20,417 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 24 states, 23 states have (on average 12.826086956521738) internal successors, (295), 23 states have internal predecessors, (295), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:03:20,418 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 24 states, 24 states have (on average 33.0) internal successors, (792), 24 states have internal predecessors, (792), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:03:20,418 INFO L81 ComplementDD]: Finished complementDD. Result has 24 states, 24 states have (on average 33.0) internal successors, (792), 24 states have internal predecessors, (792), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:03:20,418 INFO L175 Difference]: Start difference. First operand has 126 places, 150 transitions, 1624 flow. Second operand 23 states and 295 transitions. [2023-11-29 05:03:20,418 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 148 places, 352 transitions, 3916 flow [2023-11-29 05:03:20,520 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 132 places, 352 transitions, 3739 flow, removed 1 selfloop flow, removed 16 redundant places. [2023-11-29 05:03:20,525 INFO L231 Difference]: Finished difference. Result has 144 places, 212 transitions, 2721 flow [2023-11-29 05:03:20,525 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=1491, PETRI_DIFFERENCE_MINUEND_PLACES=110, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=150, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=72, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=2721, PETRI_PLACES=144, PETRI_TRANSITIONS=212} [2023-11-29 05:03:20,526 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 111 predicate places. [2023-11-29 05:03:20,526 INFO L495 AbstractCegarLoop]: Abstraction has has 144 places, 212 transitions, 2721 flow [2023-11-29 05:03:20,526 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 6.44) internal successors, (161), 25 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:03:20,526 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 05:03:20,526 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:03:20,532 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91e2605f-eff2-4533-a1b2-a84cc5102bbd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2023-11-29 05:03:20,726 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91e2605f-eff2-4533-a1b2-a84cc5102bbd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-11-29 05:03:20,727 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-29 05:03:20,727 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:03:20,727 INFO L85 PathProgramCache]: Analyzing trace with hash 393020331, now seen corresponding path program 6 times [2023-11-29 05:03:20,727 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:03:20,727 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1757587689] [2023-11-29 05:03:20,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:03:20,727 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:03:20,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:03:21,540 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-11-29 05:03:21,540 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:03:21,540 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1757587689] [2023-11-29 05:03:21,540 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1757587689] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 05:03:21,540 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [600786271] [2023-11-29 05:03:21,540 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-29 05:03:21,540 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:03:21,540 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91e2605f-eff2-4533-a1b2-a84cc5102bbd/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:03:21,541 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91e2605f-eff2-4533-a1b2-a84cc5102bbd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:03:21,543 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91e2605f-eff2-4533-a1b2-a84cc5102bbd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-11-29 05:03:21,759 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-11-29 05:03:21,759 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 05:03:21,761 INFO L262 TraceCheckSpWp]: Trace formula consists of 410 conjuncts, 32 conjunts are in the unsatisfiable core [2023-11-29 05:03:21,763 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:03:22,178 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 05:03:22,178 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 59 treesize of output 75 [2023-11-29 05:03:22,283 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-11-29 05:03:22,283 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 05:03:22,720 INFO L349 Elim1Store]: treesize reduction 32, result has 73.6 percent of original size [2023-11-29 05:03:22,720 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 46 treesize of output 102 [2023-11-29 05:03:22,855 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-11-29 05:03:22,855 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [600786271] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 05:03:22,855 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 05:03:22,855 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 9] total 29 [2023-11-29 05:03:22,856 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1808636847] [2023-11-29 05:03:22,856 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 05:03:22,856 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2023-11-29 05:03:22,856 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:03:22,857 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2023-11-29 05:03:22,857 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=699, Unknown=0, NotChecked=0, Total=812 [2023-11-29 05:03:22,857 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 33 [2023-11-29 05:03:22,858 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 144 places, 212 transitions, 2721 flow. Second operand has 29 states, 29 states have (on average 6.413793103448276) internal successors, (186), 29 states have internal predecessors, (186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:03:22,858 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 05:03:22,858 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 33 [2023-11-29 05:03:22,858 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 05:03:24,784 INFO L124 PetriNetUnfolderBase]: 2973/4350 cut-off events. [2023-11-29 05:03:24,784 INFO L125 PetriNetUnfolderBase]: For 83990/83990 co-relation queries the response was YES. [2023-11-29 05:03:24,806 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30482 conditions, 4350 events. 2973/4350 cut-off events. For 83990/83990 co-relation queries the response was YES. Maximal size of possible extension queue 241. Compared 20791 event pairs, 522 based on Foata normal form. 1/4351 useless extension candidates. Maximal degree in co-relation 30342. Up to 2066 conditions per place. [2023-11-29 05:03:24,831 INFO L140 encePairwiseOnDemand]: 22/33 looper letters, 218 selfloop transitions, 101 changer transitions 1/321 dead transitions. [2023-11-29 05:03:24,831 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 160 places, 321 transitions, 4106 flow [2023-11-29 05:03:24,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-11-29 05:03:24,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2023-11-29 05:03:24,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 233 transitions. [2023-11-29 05:03:24,832 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39225589225589225 [2023-11-29 05:03:24,832 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 233 transitions. [2023-11-29 05:03:24,833 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 233 transitions. [2023-11-29 05:03:24,833 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 05:03:24,833 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 233 transitions. [2023-11-29 05:03:24,833 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 12.944444444444445) internal successors, (233), 18 states have internal predecessors, (233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:03:24,834 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 33.0) internal successors, (627), 19 states have internal predecessors, (627), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:03:24,835 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 33.0) internal successors, (627), 19 states have internal predecessors, (627), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:03:24,835 INFO L175 Difference]: Start difference. First operand has 144 places, 212 transitions, 2721 flow. Second operand 18 states and 233 transitions. [2023-11-29 05:03:24,835 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 160 places, 321 transitions, 4106 flow [2023-11-29 05:03:25,087 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 151 places, 321 transitions, 3765 flow, removed 135 selfloop flow, removed 9 redundant places. [2023-11-29 05:03:25,092 INFO L231 Difference]: Finished difference. Result has 155 places, 222 transitions, 2834 flow [2023-11-29 05:03:25,092 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=2448, PETRI_DIFFERENCE_MINUEND_PLACES=134, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=212, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=91, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=114, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=2834, PETRI_PLACES=155, PETRI_TRANSITIONS=222} [2023-11-29 05:03:25,092 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 122 predicate places. [2023-11-29 05:03:25,093 INFO L495 AbstractCegarLoop]: Abstraction has has 155 places, 222 transitions, 2834 flow [2023-11-29 05:03:25,093 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 6.413793103448276) internal successors, (186), 29 states have internal predecessors, (186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:03:25,093 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 05:03:25,093 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:03:25,098 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91e2605f-eff2-4533-a1b2-a84cc5102bbd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2023-11-29 05:03:25,293 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91e2605f-eff2-4533-a1b2-a84cc5102bbd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:03:25,293 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-29 05:03:25,294 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:03:25,294 INFO L85 PathProgramCache]: Analyzing trace with hash 1747464901, now seen corresponding path program 7 times [2023-11-29 05:03:25,294 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:03:25,294 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1112355381] [2023-11-29 05:03:25,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:03:25,294 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:03:25,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:03:26,191 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-11-29 05:03:26,191 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:03:26,191 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1112355381] [2023-11-29 05:03:26,191 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1112355381] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 05:03:26,191 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1942418791] [2023-11-29 05:03:26,191 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-29 05:03:26,192 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:03:26,192 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91e2605f-eff2-4533-a1b2-a84cc5102bbd/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:03:26,192 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91e2605f-eff2-4533-a1b2-a84cc5102bbd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:03:26,195 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91e2605f-eff2-4533-a1b2-a84cc5102bbd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-11-29 05:03:26,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:03:26,379 INFO L262 TraceCheckSpWp]: Trace formula consists of 464 conjuncts, 36 conjunts are in the unsatisfiable core [2023-11-29 05:03:26,381 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:03:26,550 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 05:03:26,551 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 40 treesize of output 40 [2023-11-29 05:03:26,576 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-11-29 05:03:26,576 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 05:03:26,925 INFO L349 Elim1Store]: treesize reduction 32, result has 73.6 percent of original size [2023-11-29 05:03:26,926 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 46 treesize of output 102 [2023-11-29 05:03:27,050 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-11-29 05:03:27,050 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1942418791] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 05:03:27,050 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 05:03:27,050 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 9] total 23 [2023-11-29 05:03:27,050 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [403197047] [2023-11-29 05:03:27,051 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 05:03:27,051 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-11-29 05:03:27,051 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:03:27,051 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-11-29 05:03:27,052 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=431, Unknown=0, NotChecked=0, Total=506 [2023-11-29 05:03:27,052 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 33 [2023-11-29 05:03:27,052 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 155 places, 222 transitions, 2834 flow. Second operand has 23 states, 23 states have (on average 6.521739130434782) internal successors, (150), 23 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:03:27,052 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 05:03:27,052 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 33 [2023-11-29 05:03:27,052 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 05:03:28,963 INFO L124 PetriNetUnfolderBase]: 3033/4439 cut-off events. [2023-11-29 05:03:28,963 INFO L125 PetriNetUnfolderBase]: For 84396/84396 co-relation queries the response was YES. [2023-11-29 05:03:28,986 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30673 conditions, 4439 events. 3033/4439 cut-off events. For 84396/84396 co-relation queries the response was YES. Maximal size of possible extension queue 245. Compared 21294 event pairs, 562 based on Foata normal form. 1/4420 useless extension candidates. Maximal degree in co-relation 30532. Up to 2155 conditions per place. [2023-11-29 05:03:29,004 INFO L140 encePairwiseOnDemand]: 22/33 looper letters, 215 selfloop transitions, 94 changer transitions 1/311 dead transitions. [2023-11-29 05:03:29,004 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 170 places, 311 transitions, 4009 flow [2023-11-29 05:03:29,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-11-29 05:03:29,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2023-11-29 05:03:29,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 203 transitions. [2023-11-29 05:03:29,005 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38446969696969696 [2023-11-29 05:03:29,005 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 203 transitions. [2023-11-29 05:03:29,005 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 203 transitions. [2023-11-29 05:03:29,005 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 05:03:29,005 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 203 transitions. [2023-11-29 05:03:29,006 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 12.6875) internal successors, (203), 16 states have internal predecessors, (203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:03:29,007 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 33.0) internal successors, (561), 17 states have internal predecessors, (561), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:03:29,008 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 33.0) internal successors, (561), 17 states have internal predecessors, (561), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:03:29,008 INFO L175 Difference]: Start difference. First operand has 155 places, 222 transitions, 2834 flow. Second operand 16 states and 203 transitions. [2023-11-29 05:03:29,008 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 170 places, 311 transitions, 4009 flow [2023-11-29 05:03:29,158 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 156 places, 311 transitions, 3760 flow, removed 44 selfloop flow, removed 14 redundant places. [2023-11-29 05:03:29,163 INFO L231 Difference]: Finished difference. Result has 157 places, 225 transitions, 2844 flow [2023-11-29 05:03:29,163 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=2598, PETRI_DIFFERENCE_MINUEND_PLACES=141, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=222, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=91, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=129, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=2844, PETRI_PLACES=157, PETRI_TRANSITIONS=225} [2023-11-29 05:03:29,163 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 124 predicate places. [2023-11-29 05:03:29,163 INFO L495 AbstractCegarLoop]: Abstraction has has 157 places, 225 transitions, 2844 flow [2023-11-29 05:03:29,164 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 6.521739130434782) internal successors, (150), 23 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:03:29,164 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 05:03:29,164 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:03:29,169 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91e2605f-eff2-4533-a1b2-a84cc5102bbd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2023-11-29 05:03:29,364 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91e2605f-eff2-4533-a1b2-a84cc5102bbd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:03:29,364 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-29 05:03:29,365 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:03:29,365 INFO L85 PathProgramCache]: Analyzing trace with hash 1477894321, now seen corresponding path program 8 times [2023-11-29 05:03:29,365 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:03:29,365 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [799780767] [2023-11-29 05:03:29,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:03:29,365 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:03:29,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:03:30,068 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-11-29 05:03:30,069 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:03:30,069 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [799780767] [2023-11-29 05:03:30,069 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [799780767] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 05:03:30,069 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [420797829] [2023-11-29 05:03:30,069 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 05:03:30,069 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:03:30,069 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91e2605f-eff2-4533-a1b2-a84cc5102bbd/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:03:30,070 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91e2605f-eff2-4533-a1b2-a84cc5102bbd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:03:30,071 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91e2605f-eff2-4533-a1b2-a84cc5102bbd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-11-29 05:03:30,263 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-29 05:03:30,263 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 05:03:30,266 INFO L262 TraceCheckSpWp]: Trace formula consists of 464 conjuncts, 32 conjunts are in the unsatisfiable core [2023-11-29 05:03:30,267 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:03:30,609 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 05:03:30,609 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 59 treesize of output 75 [2023-11-29 05:03:30,694 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-11-29 05:03:30,694 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 05:03:31,067 INFO L349 Elim1Store]: treesize reduction 32, result has 73.6 percent of original size [2023-11-29 05:03:31,067 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 46 treesize of output 102 [2023-11-29 05:03:31,242 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-11-29 05:03:31,243 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [420797829] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 05:03:31,243 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 05:03:31,243 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 9] total 29 [2023-11-29 05:03:31,243 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [255550379] [2023-11-29 05:03:31,243 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 05:03:31,243 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2023-11-29 05:03:31,244 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:03:31,244 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2023-11-29 05:03:31,245 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=708, Unknown=0, NotChecked=0, Total=812 [2023-11-29 05:03:31,245 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 33 [2023-11-29 05:03:31,245 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 157 places, 225 transitions, 2844 flow. Second operand has 29 states, 29 states have (on average 6.413793103448276) internal successors, (186), 29 states have internal predecessors, (186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:03:31,245 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 05:03:31,245 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 33 [2023-11-29 05:03:31,245 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 05:03:33,891 INFO L124 PetriNetUnfolderBase]: 3253/4772 cut-off events. [2023-11-29 05:03:33,891 INFO L125 PetriNetUnfolderBase]: For 81019/81019 co-relation queries the response was YES. [2023-11-29 05:03:33,915 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32389 conditions, 4772 events. 3253/4772 cut-off events. For 81019/81019 co-relation queries the response was YES. Maximal size of possible extension queue 263. Compared 23361 event pairs, 400 based on Foata normal form. 1/4739 useless extension candidates. Maximal degree in co-relation 32249. Up to 1740 conditions per place. [2023-11-29 05:03:33,938 INFO L140 encePairwiseOnDemand]: 22/33 looper letters, 234 selfloop transitions, 128 changer transitions 8/371 dead transitions. [2023-11-29 05:03:33,938 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 179 places, 371 transitions, 4648 flow [2023-11-29 05:03:33,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-11-29 05:03:33,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2023-11-29 05:03:33,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 298 transitions. [2023-11-29 05:03:33,940 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3926218708827404 [2023-11-29 05:03:33,940 INFO L72 ComplementDD]: Start complementDD. Operand 23 states and 298 transitions. [2023-11-29 05:03:33,940 INFO L73 IsDeterministic]: Start isDeterministic. Operand 23 states and 298 transitions. [2023-11-29 05:03:33,941 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 05:03:33,941 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 23 states and 298 transitions. [2023-11-29 05:03:33,942 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 24 states, 23 states have (on average 12.956521739130435) internal successors, (298), 23 states have internal predecessors, (298), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:03:33,943 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 24 states, 24 states have (on average 33.0) internal successors, (792), 24 states have internal predecessors, (792), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:03:33,944 INFO L81 ComplementDD]: Finished complementDD. Result has 24 states, 24 states have (on average 33.0) internal successors, (792), 24 states have internal predecessors, (792), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:03:33,944 INFO L175 Difference]: Start difference. First operand has 157 places, 225 transitions, 2844 flow. Second operand 23 states and 298 transitions. [2023-11-29 05:03:33,944 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 179 places, 371 transitions, 4648 flow [2023-11-29 05:03:34,134 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 168 places, 371 transitions, 4492 flow, removed 13 selfloop flow, removed 11 redundant places. [2023-11-29 05:03:34,140 INFO L231 Difference]: Finished difference. Result has 173 places, 236 transitions, 3206 flow [2023-11-29 05:03:34,140 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=2694, PETRI_DIFFERENCE_MINUEND_PLACES=146, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=225, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=119, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=103, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=3206, PETRI_PLACES=173, PETRI_TRANSITIONS=236} [2023-11-29 05:03:34,141 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 140 predicate places. [2023-11-29 05:03:34,141 INFO L495 AbstractCegarLoop]: Abstraction has has 173 places, 236 transitions, 3206 flow [2023-11-29 05:03:34,141 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 6.413793103448276) internal successors, (186), 29 states have internal predecessors, (186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:03:34,141 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 05:03:34,141 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:03:34,146 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91e2605f-eff2-4533-a1b2-a84cc5102bbd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2023-11-29 05:03:34,341 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91e2605f-eff2-4533-a1b2-a84cc5102bbd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2023-11-29 05:03:34,342 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-29 05:03:34,342 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:03:34,342 INFO L85 PathProgramCache]: Analyzing trace with hash -1842789747, now seen corresponding path program 9 times [2023-11-29 05:03:34,342 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:03:34,342 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2000679519] [2023-11-29 05:03:34,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:03:34,342 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:03:34,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:03:35,172 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-11-29 05:03:35,173 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:03:35,173 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2000679519] [2023-11-29 05:03:35,173 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2000679519] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 05:03:35,173 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1784745706] [2023-11-29 05:03:35,173 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-29 05:03:35,173 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:03:35,173 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91e2605f-eff2-4533-a1b2-a84cc5102bbd/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:03:35,174 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91e2605f-eff2-4533-a1b2-a84cc5102bbd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:03:35,174 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91e2605f-eff2-4533-a1b2-a84cc5102bbd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-11-29 05:03:35,387 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-11-29 05:03:35,387 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 05:03:35,390 INFO L262 TraceCheckSpWp]: Trace formula consists of 437 conjuncts, 36 conjunts are in the unsatisfiable core [2023-11-29 05:03:35,391 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:03:35,602 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 05:03:35,603 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 40 treesize of output 40 [2023-11-29 05:03:35,743 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-11-29 05:03:35,743 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 05:03:36,220 INFO L349 Elim1Store]: treesize reduction 36, result has 70.2 percent of original size [2023-11-29 05:03:36,221 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 48 treesize of output 100 [2023-11-29 05:03:36,335 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-11-29 05:03:36,335 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1784745706] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 05:03:36,335 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 05:03:36,335 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 9] total 26 [2023-11-29 05:03:36,335 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1456985463] [2023-11-29 05:03:36,335 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 05:03:36,336 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-11-29 05:03:36,336 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:03:36,336 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-11-29 05:03:36,336 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=562, Unknown=0, NotChecked=0, Total=650 [2023-11-29 05:03:36,337 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 33 [2023-11-29 05:03:36,337 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 173 places, 236 transitions, 3206 flow. Second operand has 26 states, 26 states have (on average 6.461538461538462) internal successors, (168), 26 states have internal predecessors, (168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:03:36,337 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 05:03:36,337 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 33 [2023-11-29 05:03:36,337 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 05:03:39,205 INFO L124 PetriNetUnfolderBase]: 3378/4955 cut-off events. [2023-11-29 05:03:39,205 INFO L125 PetriNetUnfolderBase]: For 105451/105451 co-relation queries the response was YES. [2023-11-29 05:03:39,230 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35635 conditions, 4955 events. 3378/4955 cut-off events. For 105451/105451 co-relation queries the response was YES. Maximal size of possible extension queue 262. Compared 24307 event pairs, 628 based on Foata normal form. 2/4937 useless extension candidates. Maximal degree in co-relation 35490. Up to 2430 conditions per place. [2023-11-29 05:03:39,249 INFO L140 encePairwiseOnDemand]: 21/33 looper letters, 251 selfloop transitions, 119 changer transitions 5/376 dead transitions. [2023-11-29 05:03:39,249 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 196 places, 376 transitions, 4887 flow [2023-11-29 05:03:39,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-11-29 05:03:39,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2023-11-29 05:03:39,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 303 transitions. [2023-11-29 05:03:39,250 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38257575757575757 [2023-11-29 05:03:39,250 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 303 transitions. [2023-11-29 05:03:39,250 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 303 transitions. [2023-11-29 05:03:39,251 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 05:03:39,251 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 303 transitions. [2023-11-29 05:03:39,251 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 12.625) internal successors, (303), 24 states have internal predecessors, (303), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:03:39,252 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 33.0) internal successors, (825), 25 states have internal predecessors, (825), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:03:39,253 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 33.0) internal successors, (825), 25 states have internal predecessors, (825), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:03:39,253 INFO L175 Difference]: Start difference. First operand has 173 places, 236 transitions, 3206 flow. Second operand 24 states and 303 transitions. [2023-11-29 05:03:39,253 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 196 places, 376 transitions, 4887 flow [2023-11-29 05:03:39,455 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 176 places, 376 transitions, 4625 flow, removed 40 selfloop flow, removed 20 redundant places. [2023-11-29 05:03:39,460 INFO L231 Difference]: Finished difference. Result has 180 places, 248 transitions, 3460 flow [2023-11-29 05:03:39,460 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=2950, PETRI_DIFFERENCE_MINUEND_PLACES=153, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=236, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=109, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=124, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=3460, PETRI_PLACES=180, PETRI_TRANSITIONS=248} [2023-11-29 05:03:39,461 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 147 predicate places. [2023-11-29 05:03:39,461 INFO L495 AbstractCegarLoop]: Abstraction has has 180 places, 248 transitions, 3460 flow [2023-11-29 05:03:39,461 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 6.461538461538462) internal successors, (168), 26 states have internal predecessors, (168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:03:39,461 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 05:03:39,461 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:03:39,468 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91e2605f-eff2-4533-a1b2-a84cc5102bbd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2023-11-29 05:03:39,661 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91e2605f-eff2-4533-a1b2-a84cc5102bbd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:03:39,662 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-29 05:03:39,662 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:03:39,662 INFO L85 PathProgramCache]: Analyzing trace with hash -226946819, now seen corresponding path program 10 times [2023-11-29 05:03:39,662 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:03:39,662 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1859936228] [2023-11-29 05:03:39,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:03:39,662 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:03:39,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:03:40,437 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-11-29 05:03:40,437 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:03:40,437 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1859936228] [2023-11-29 05:03:40,437 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1859936228] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 05:03:40,437 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1465584388] [2023-11-29 05:03:40,437 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-29 05:03:40,437 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:03:40,437 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91e2605f-eff2-4533-a1b2-a84cc5102bbd/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:03:40,438 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91e2605f-eff2-4533-a1b2-a84cc5102bbd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:03:40,439 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91e2605f-eff2-4533-a1b2-a84cc5102bbd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-11-29 05:03:40,642 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-29 05:03:40,643 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 05:03:40,645 INFO L262 TraceCheckSpWp]: Trace formula consists of 464 conjuncts, 36 conjunts are in the unsatisfiable core [2023-11-29 05:03:40,647 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:03:40,865 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 05:03:40,865 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 40 treesize of output 40 [2023-11-29 05:03:40,888 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-11-29 05:03:40,888 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 05:03:41,301 INFO L349 Elim1Store]: treesize reduction 8, result has 96.1 percent of original size [2023-11-29 05:03:41,302 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 54 treesize of output 210 [2023-11-29 05:03:48,919 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-11-29 05:03:48,919 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1465584388] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 05:03:48,919 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 05:03:48,919 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 9] total 25 [2023-11-29 05:03:48,919 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1767484603] [2023-11-29 05:03:48,919 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 05:03:48,920 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-11-29 05:03:48,920 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:03:48,920 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-11-29 05:03:48,920 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=512, Unknown=0, NotChecked=0, Total=600 [2023-11-29 05:03:48,920 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 33 [2023-11-29 05:03:48,921 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 180 places, 248 transitions, 3460 flow. Second operand has 25 states, 25 states have (on average 6.4) internal successors, (160), 25 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:03:48,921 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 05:03:48,921 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 33 [2023-11-29 05:03:48,921 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 05:03:51,261 INFO L124 PetriNetUnfolderBase]: 3936/5823 cut-off events. [2023-11-29 05:03:51,261 INFO L125 PetriNetUnfolderBase]: For 135384/135384 co-relation queries the response was YES. [2023-11-29 05:03:51,293 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42619 conditions, 5823 events. 3936/5823 cut-off events. For 135384/135384 co-relation queries the response was YES. Maximal size of possible extension queue 314. Compared 30007 event pairs, 872 based on Foata normal form. 2/5805 useless extension candidates. Maximal degree in co-relation 42472. Up to 4364 conditions per place. [2023-11-29 05:03:51,317 INFO L140 encePairwiseOnDemand]: 21/33 looper letters, 281 selfloop transitions, 110 changer transitions 2/394 dead transitions. [2023-11-29 05:03:51,317 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 199 places, 394 transitions, 5693 flow [2023-11-29 05:03:51,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-11-29 05:03:51,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2023-11-29 05:03:51,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 247 transitions. [2023-11-29 05:03:51,318 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37424242424242427 [2023-11-29 05:03:51,318 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 247 transitions. [2023-11-29 05:03:51,318 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 247 transitions. [2023-11-29 05:03:51,319 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 05:03:51,319 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 247 transitions. [2023-11-29 05:03:51,319 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 21 states, 20 states have (on average 12.35) internal successors, (247), 20 states have internal predecessors, (247), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:03:51,320 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 21 states, 21 states have (on average 33.0) internal successors, (693), 21 states have internal predecessors, (693), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:03:51,320 INFO L81 ComplementDD]: Finished complementDD. Result has 21 states, 21 states have (on average 33.0) internal successors, (693), 21 states have internal predecessors, (693), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:03:51,320 INFO L175 Difference]: Start difference. First operand has 180 places, 248 transitions, 3460 flow. Second operand 20 states and 247 transitions. [2023-11-29 05:03:51,320 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 199 places, 394 transitions, 5693 flow [2023-11-29 05:03:51,591 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 181 places, 394 transitions, 5263 flow, removed 75 selfloop flow, removed 18 redundant places. [2023-11-29 05:03:51,597 INFO L231 Difference]: Finished difference. Result has 187 places, 290 transitions, 3982 flow [2023-11-29 05:03:51,597 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=3090, PETRI_DIFFERENCE_MINUEND_PLACES=162, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=248, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=74, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=166, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=3982, PETRI_PLACES=187, PETRI_TRANSITIONS=290} [2023-11-29 05:03:51,598 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 154 predicate places. [2023-11-29 05:03:51,598 INFO L495 AbstractCegarLoop]: Abstraction has has 187 places, 290 transitions, 3982 flow [2023-11-29 05:03:51,598 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 6.4) internal successors, (160), 25 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:03:51,598 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 05:03:51,598 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:03:51,603 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91e2605f-eff2-4533-a1b2-a84cc5102bbd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2023-11-29 05:03:51,798 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91e2605f-eff2-4533-a1b2-a84cc5102bbd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:03:51,799 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-29 05:03:51,799 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:03:51,799 INFO L85 PathProgramCache]: Analyzing trace with hash -255465847, now seen corresponding path program 11 times [2023-11-29 05:03:51,799 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:03:51,799 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1243105134] [2023-11-29 05:03:51,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:03:51,799 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:03:51,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:03:52,673 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-11-29 05:03:52,673 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:03:52,673 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1243105134] [2023-11-29 05:03:52,673 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1243105134] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 05:03:52,673 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2050354158] [2023-11-29 05:03:52,673 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-29 05:03:52,673 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:03:52,674 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91e2605f-eff2-4533-a1b2-a84cc5102bbd/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:03:52,674 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91e2605f-eff2-4533-a1b2-a84cc5102bbd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:03:52,676 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91e2605f-eff2-4533-a1b2-a84cc5102bbd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-11-29 05:03:53,530 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2023-11-29 05:03:53,530 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 05:03:53,534 INFO L262 TraceCheckSpWp]: Trace formula consists of 464 conjuncts, 36 conjunts are in the unsatisfiable core [2023-11-29 05:03:53,535 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:03:53,738 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 05:03:53,738 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 40 treesize of output 40 [2023-11-29 05:03:53,756 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-11-29 05:03:53,757 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 05:03:54,161 INFO L349 Elim1Store]: treesize reduction 8, result has 96.1 percent of original size [2023-11-29 05:03:54,161 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 54 treesize of output 210 [2023-11-29 05:04:03,050 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-11-29 05:04:03,050 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2050354158] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 05:04:03,050 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 05:04:03,051 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 9] total 25 [2023-11-29 05:04:03,051 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1661970331] [2023-11-29 05:04:03,051 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 05:04:03,051 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-11-29 05:04:03,051 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:04:03,052 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-11-29 05:04:03,052 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=516, Unknown=0, NotChecked=0, Total=600 [2023-11-29 05:04:03,052 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 33 [2023-11-29 05:04:03,053 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 187 places, 290 transitions, 3982 flow. Second operand has 25 states, 25 states have (on average 6.4) internal successors, (160), 25 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:04:03,053 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 05:04:03,053 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 33 [2023-11-29 05:04:03,053 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 05:04:05,712 INFO L124 PetriNetUnfolderBase]: 4818/7169 cut-off events. [2023-11-29 05:04:05,712 INFO L125 PetriNetUnfolderBase]: For 172361/172361 co-relation queries the response was YES. [2023-11-29 05:04:05,759 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54000 conditions, 7169 events. 4818/7169 cut-off events. For 172361/172361 co-relation queries the response was YES. Maximal size of possible extension queue 384. Compared 38784 event pairs, 982 based on Foata normal form. 2/7151 useless extension candidates. Maximal degree in co-relation 53847. Up to 5054 conditions per place. [2023-11-29 05:04:05,801 INFO L140 encePairwiseOnDemand]: 21/33 looper letters, 310 selfloop transitions, 130 changer transitions 2/443 dead transitions. [2023-11-29 05:04:05,801 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 206 places, 443 transitions, 6480 flow [2023-11-29 05:04:05,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-11-29 05:04:05,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2023-11-29 05:04:05,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 251 transitions. [2023-11-29 05:04:05,803 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3803030303030303 [2023-11-29 05:04:05,803 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 251 transitions. [2023-11-29 05:04:05,803 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 251 transitions. [2023-11-29 05:04:05,803 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 05:04:05,803 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 251 transitions. [2023-11-29 05:04:05,804 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 21 states, 20 states have (on average 12.55) internal successors, (251), 20 states have internal predecessors, (251), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:04:05,805 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 21 states, 21 states have (on average 33.0) internal successors, (693), 21 states have internal predecessors, (693), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:04:05,805 INFO L81 ComplementDD]: Finished complementDD. Result has 21 states, 21 states have (on average 33.0) internal successors, (693), 21 states have internal predecessors, (693), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:04:05,805 INFO L175 Difference]: Start difference. First operand has 187 places, 290 transitions, 3982 flow. Second operand 20 states and 251 transitions. [2023-11-29 05:04:05,806 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 206 places, 443 transitions, 6480 flow [2023-11-29 05:04:06,338 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 200 places, 443 transitions, 6351 flow, removed 49 selfloop flow, removed 6 redundant places. [2023-11-29 05:04:06,344 INFO L231 Difference]: Finished difference. Result has 205 places, 328 transitions, 4785 flow [2023-11-29 05:04:06,345 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=3873, PETRI_DIFFERENCE_MINUEND_PLACES=181, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=290, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=98, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=183, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=4785, PETRI_PLACES=205, PETRI_TRANSITIONS=328} [2023-11-29 05:04:06,345 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 172 predicate places. [2023-11-29 05:04:06,345 INFO L495 AbstractCegarLoop]: Abstraction has has 205 places, 328 transitions, 4785 flow [2023-11-29 05:04:06,345 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 6.4) internal successors, (160), 25 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:04:06,345 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 05:04:06,345 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:04:06,351 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91e2605f-eff2-4533-a1b2-a84cc5102bbd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2023-11-29 05:04:06,546 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91e2605f-eff2-4533-a1b2-a84cc5102bbd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2023-11-29 05:04:06,546 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-29 05:04:06,546 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:04:06,546 INFO L85 PathProgramCache]: Analyzing trace with hash 1191923303, now seen corresponding path program 12 times [2023-11-29 05:04:06,546 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:04:06,546 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [883809694] [2023-11-29 05:04:06,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:04:06,547 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:04:06,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:04:07,310 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-11-29 05:04:07,311 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:04:07,311 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [883809694] [2023-11-29 05:04:07,311 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [883809694] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 05:04:07,311 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [316828696] [2023-11-29 05:04:07,311 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-29 05:04:07,311 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:04:07,311 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91e2605f-eff2-4533-a1b2-a84cc5102bbd/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:04:07,312 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91e2605f-eff2-4533-a1b2-a84cc5102bbd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:04:07,312 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91e2605f-eff2-4533-a1b2-a84cc5102bbd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2023-11-29 05:04:07,723 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-11-29 05:04:07,723 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 05:04:07,726 INFO L262 TraceCheckSpWp]: Trace formula consists of 410 conjuncts, 32 conjunts are in the unsatisfiable core [2023-11-29 05:04:07,727 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:04:08,063 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 05:04:08,064 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 59 treesize of output 75 [2023-11-29 05:04:08,157 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-11-29 05:04:08,157 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 05:04:08,643 INFO L349 Elim1Store]: treesize reduction 8, result has 96.1 percent of original size [2023-11-29 05:04:08,643 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 54 treesize of output 210 [2023-11-29 05:04:16,400 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-11-29 05:04:16,400 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [316828696] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 05:04:16,401 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 05:04:16,401 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 9] total 28 [2023-11-29 05:04:16,401 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1104656917] [2023-11-29 05:04:16,401 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 05:04:16,401 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2023-11-29 05:04:16,402 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:04:16,402 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2023-11-29 05:04:16,402 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=641, Unknown=0, NotChecked=0, Total=756 [2023-11-29 05:04:16,403 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 33 [2023-11-29 05:04:16,403 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 205 places, 328 transitions, 4785 flow. Second operand has 28 states, 28 states have (on average 6.535714285714286) internal successors, (183), 28 states have internal predecessors, (183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:04:16,403 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 05:04:16,403 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 33 [2023-11-29 05:04:16,403 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 05:04:19,236 INFO L124 PetriNetUnfolderBase]: 5028/7496 cut-off events. [2023-11-29 05:04:19,236 INFO L125 PetriNetUnfolderBase]: For 189292/189292 co-relation queries the response was YES. [2023-11-29 05:04:19,287 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59081 conditions, 7496 events. 5028/7496 cut-off events. For 189292/189292 co-relation queries the response was YES. Maximal size of possible extension queue 409. Compared 41083 event pairs, 1209 based on Foata normal form. 3/7479 useless extension candidates. Maximal degree in co-relation 58923. Up to 6294 conditions per place. [2023-11-29 05:04:19,320 INFO L140 encePairwiseOnDemand]: 20/33 looper letters, 288 selfloop transitions, 135 changer transitions 3/427 dead transitions. [2023-11-29 05:04:19,320 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 222 places, 427 transitions, 6478 flow [2023-11-29 05:04:19,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-11-29 05:04:19,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2023-11-29 05:04:19,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 215 transitions. [2023-11-29 05:04:19,322 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36195286195286197 [2023-11-29 05:04:19,322 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 215 transitions. [2023-11-29 05:04:19,322 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 215 transitions. [2023-11-29 05:04:19,322 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 05:04:19,322 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 215 transitions. [2023-11-29 05:04:19,323 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 11.944444444444445) internal successors, (215), 18 states have internal predecessors, (215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:04:19,324 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 33.0) internal successors, (627), 19 states have internal predecessors, (627), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:04:19,324 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 33.0) internal successors, (627), 19 states have internal predecessors, (627), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:04:19,324 INFO L175 Difference]: Start difference. First operand has 205 places, 328 transitions, 4785 flow. Second operand 18 states and 215 transitions. [2023-11-29 05:04:19,324 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 222 places, 427 transitions, 6478 flow [2023-11-29 05:04:19,808 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 213 places, 427 transitions, 6294 flow, removed 47 selfloop flow, removed 9 redundant places. [2023-11-29 05:04:19,815 INFO L231 Difference]: Finished difference. Result has 218 places, 353 transitions, 5283 flow [2023-11-29 05:04:19,815 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=4602, PETRI_DIFFERENCE_MINUEND_PLACES=196, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=328, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=113, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=200, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=5283, PETRI_PLACES=218, PETRI_TRANSITIONS=353} [2023-11-29 05:04:19,816 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 185 predicate places. [2023-11-29 05:04:19,816 INFO L495 AbstractCegarLoop]: Abstraction has has 218 places, 353 transitions, 5283 flow [2023-11-29 05:04:19,816 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 6.535714285714286) internal successors, (183), 28 states have internal predecessors, (183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:04:19,816 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 05:04:19,816 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:04:19,821 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91e2605f-eff2-4533-a1b2-a84cc5102bbd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2023-11-29 05:04:20,016 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91e2605f-eff2-4533-a1b2-a84cc5102bbd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2023-11-29 05:04:20,017 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-29 05:04:20,017 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:04:20,017 INFO L85 PathProgramCache]: Analyzing trace with hash -1934549285, now seen corresponding path program 13 times [2023-11-29 05:04:20,017 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:04:20,017 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [435786924] [2023-11-29 05:04:20,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:04:20,018 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:04:20,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:04:20,933 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-11-29 05:04:20,933 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:04:20,933 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [435786924] [2023-11-29 05:04:20,933 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [435786924] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 05:04:20,933 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1861089074] [2023-11-29 05:04:20,933 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-29 05:04:20,933 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:04:20,933 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91e2605f-eff2-4533-a1b2-a84cc5102bbd/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:04:20,934 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91e2605f-eff2-4533-a1b2-a84cc5102bbd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:04:20,939 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91e2605f-eff2-4533-a1b2-a84cc5102bbd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2023-11-29 05:04:21,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:04:21,149 INFO L262 TraceCheckSpWp]: Trace formula consists of 464 conjuncts, 36 conjunts are in the unsatisfiable core [2023-11-29 05:04:21,151 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:04:21,329 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 05:04:21,330 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 40 treesize of output 40 [2023-11-29 05:04:21,360 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-11-29 05:04:21,360 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 05:04:21,823 INFO L349 Elim1Store]: treesize reduction 8, result has 96.1 percent of original size [2023-11-29 05:04:21,824 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 54 treesize of output 210 [2023-11-29 05:04:27,867 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-11-29 05:04:27,868 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1861089074] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 05:04:27,868 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 05:04:27,868 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 9] total 23 [2023-11-29 05:04:27,868 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [362225172] [2023-11-29 05:04:27,868 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 05:04:27,868 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-11-29 05:04:27,869 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:04:27,869 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-11-29 05:04:27,869 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=426, Unknown=0, NotChecked=0, Total=506 [2023-11-29 05:04:27,869 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 33 [2023-11-29 05:04:27,870 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 218 places, 353 transitions, 5283 flow. Second operand has 23 states, 23 states have (on average 6.521739130434782) internal successors, (150), 23 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:04:27,870 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 05:04:27,870 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 33 [2023-11-29 05:04:27,870 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 05:04:30,486 INFO L124 PetriNetUnfolderBase]: 5108/7622 cut-off events. [2023-11-29 05:04:30,486 INFO L125 PetriNetUnfolderBase]: For 193508/193508 co-relation queries the response was YES. [2023-11-29 05:04:30,549 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61784 conditions, 7622 events. 5108/7622 cut-off events. For 193508/193508 co-relation queries the response was YES. Maximal size of possible extension queue 417. Compared 41980 event pairs, 1275 based on Foata normal form. 2/7604 useless extension candidates. Maximal degree in co-relation 61621. Up to 6513 conditions per place. [2023-11-29 05:04:30,585 INFO L140 encePairwiseOnDemand]: 21/33 looper letters, 305 selfloop transitions, 120 changer transitions 2/428 dead transitions. [2023-11-29 05:04:30,585 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 234 places, 428 transitions, 6819 flow [2023-11-29 05:04:30,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-11-29 05:04:30,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2023-11-29 05:04:30,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 197 transitions. [2023-11-29 05:04:30,586 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3511586452762923 [2023-11-29 05:04:30,586 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 197 transitions. [2023-11-29 05:04:30,586 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 197 transitions. [2023-11-29 05:04:30,586 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 05:04:30,586 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 197 transitions. [2023-11-29 05:04:30,587 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 11.588235294117647) internal successors, (197), 17 states have internal predecessors, (197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:04:30,587 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 33.0) internal successors, (594), 18 states have internal predecessors, (594), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:04:30,588 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 33.0) internal successors, (594), 18 states have internal predecessors, (594), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:04:30,588 INFO L175 Difference]: Start difference. First operand has 218 places, 353 transitions, 5283 flow. Second operand 17 states and 197 transitions. [2023-11-29 05:04:30,588 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 234 places, 428 transitions, 6819 flow [2023-11-29 05:04:31,399 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 223 places, 428 transitions, 6594 flow, removed 42 selfloop flow, removed 11 redundant places. [2023-11-29 05:04:31,406 INFO L231 Difference]: Finished difference. Result has 225 places, 362 transitions, 5512 flow [2023-11-29 05:04:31,407 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=5070, PETRI_DIFFERENCE_MINUEND_PLACES=207, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=353, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=114, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=236, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=5512, PETRI_PLACES=225, PETRI_TRANSITIONS=362} [2023-11-29 05:04:31,407 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 192 predicate places. [2023-11-29 05:04:31,407 INFO L495 AbstractCegarLoop]: Abstraction has has 225 places, 362 transitions, 5512 flow [2023-11-29 05:04:31,407 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 6.521739130434782) internal successors, (150), 23 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:04:31,407 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 05:04:31,408 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:04:31,413 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91e2605f-eff2-4533-a1b2-a84cc5102bbd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2023-11-29 05:04:31,608 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91e2605f-eff2-4533-a1b2-a84cc5102bbd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:04:31,608 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-29 05:04:31,608 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:04:31,608 INFO L85 PathProgramCache]: Analyzing trace with hash -517220953, now seen corresponding path program 14 times [2023-11-29 05:04:31,609 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:04:31,609 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [467548984] [2023-11-29 05:04:31,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:04:31,609 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:04:31,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:04:32,325 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-11-29 05:04:32,326 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:04:32,326 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [467548984] [2023-11-29 05:04:32,326 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [467548984] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 05:04:32,326 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1868304988] [2023-11-29 05:04:32,326 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 05:04:32,326 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:04:32,326 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91e2605f-eff2-4533-a1b2-a84cc5102bbd/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:04:32,327 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91e2605f-eff2-4533-a1b2-a84cc5102bbd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:04:32,328 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91e2605f-eff2-4533-a1b2-a84cc5102bbd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2023-11-29 05:04:32,561 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-29 05:04:32,561 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 05:04:32,564 INFO L262 TraceCheckSpWp]: Trace formula consists of 464 conjuncts, 34 conjunts are in the unsatisfiable core [2023-11-29 05:04:32,566 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:04:32,929 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 05:04:32,929 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 59 treesize of output 75 [2023-11-29 05:04:33,010 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-11-29 05:04:33,010 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 05:04:33,542 INFO L349 Elim1Store]: treesize reduction 8, result has 96.1 percent of original size [2023-11-29 05:04:33,543 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 54 treesize of output 210 [2023-11-29 05:04:39,838 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-11-29 05:04:39,838 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1868304988] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 05:04:39,838 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 05:04:39,838 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 9] total 28 [2023-11-29 05:04:39,839 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [647874811] [2023-11-29 05:04:39,839 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 05:04:39,839 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2023-11-29 05:04:39,839 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:04:39,840 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2023-11-29 05:04:39,840 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=656, Unknown=0, NotChecked=0, Total=756 [2023-11-29 05:04:39,840 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 33 [2023-11-29 05:04:39,840 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 225 places, 362 transitions, 5512 flow. Second operand has 28 states, 28 states have (on average 6.464285714285714) internal successors, (181), 28 states have internal predecessors, (181), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:04:39,841 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 05:04:39,841 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 33 [2023-11-29 05:04:39,841 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 05:04:42,819 INFO L124 PetriNetUnfolderBase]: 5230/7824 cut-off events. [2023-11-29 05:04:42,819 INFO L125 PetriNetUnfolderBase]: For 213718/213718 co-relation queries the response was YES. [2023-11-29 05:04:42,883 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64483 conditions, 7824 events. 5230/7824 cut-off events. For 213718/213718 co-relation queries the response was YES. Maximal size of possible extension queue 430. Compared 43386 event pairs, 1251 based on Foata normal form. 4/7780 useless extension candidates. Maximal degree in co-relation 64318. Up to 6385 conditions per place. [2023-11-29 05:04:42,920 INFO L140 encePairwiseOnDemand]: 20/33 looper letters, 320 selfloop transitions, 131 changer transitions 3/455 dead transitions. [2023-11-29 05:04:42,920 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 242 places, 455 transitions, 7290 flow [2023-11-29 05:04:42,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-11-29 05:04:42,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2023-11-29 05:04:42,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 216 transitions. [2023-11-29 05:04:42,921 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36363636363636365 [2023-11-29 05:04:42,921 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 216 transitions. [2023-11-29 05:04:42,921 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 216 transitions. [2023-11-29 05:04:42,922 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 05:04:42,922 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 216 transitions. [2023-11-29 05:04:42,922 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 12.0) internal successors, (216), 18 states have internal predecessors, (216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:04:42,923 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 33.0) internal successors, (627), 19 states have internal predecessors, (627), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:04:42,923 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 33.0) internal successors, (627), 19 states have internal predecessors, (627), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:04:42,923 INFO L175 Difference]: Start difference. First operand has 225 places, 362 transitions, 5512 flow. Second operand 18 states and 216 transitions. [2023-11-29 05:04:42,924 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 242 places, 455 transitions, 7290 flow [2023-11-29 05:04:43,660 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 231 places, 455 transitions, 7156 flow, removed 18 selfloop flow, removed 11 redundant places. [2023-11-29 05:04:43,668 INFO L231 Difference]: Finished difference. Result has 235 places, 376 transitions, 5958 flow [2023-11-29 05:04:43,668 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=5378, PETRI_DIFFERENCE_MINUEND_PLACES=214, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=362, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=121, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=237, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=5958, PETRI_PLACES=235, PETRI_TRANSITIONS=376} [2023-11-29 05:04:43,669 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 202 predicate places. [2023-11-29 05:04:43,669 INFO L495 AbstractCegarLoop]: Abstraction has has 235 places, 376 transitions, 5958 flow [2023-11-29 05:04:43,669 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 6.464285714285714) internal successors, (181), 28 states have internal predecessors, (181), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:04:43,669 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 05:04:43,669 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:04:43,674 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91e2605f-eff2-4533-a1b2-a84cc5102bbd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2023-11-29 05:04:43,870 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91e2605f-eff2-4533-a1b2-a84cc5102bbd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2023-11-29 05:04:43,870 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-29 05:04:43,870 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:04:43,870 INFO L85 PathProgramCache]: Analyzing trace with hash 659123945, now seen corresponding path program 15 times [2023-11-29 05:04:43,870 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:04:43,870 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [710333722] [2023-11-29 05:04:43,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:04:43,870 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:04:43,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:04:44,784 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-11-29 05:04:44,784 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:04:44,784 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [710333722] [2023-11-29 05:04:44,784 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [710333722] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 05:04:44,784 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [575112819] [2023-11-29 05:04:44,784 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-29 05:04:44,784 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:04:44,784 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91e2605f-eff2-4533-a1b2-a84cc5102bbd/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:04:44,785 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91e2605f-eff2-4533-a1b2-a84cc5102bbd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:04:44,786 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91e2605f-eff2-4533-a1b2-a84cc5102bbd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2023-11-29 05:04:45,082 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-11-29 05:04:45,082 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 05:04:45,085 INFO L262 TraceCheckSpWp]: Trace formula consists of 437 conjuncts, 36 conjunts are in the unsatisfiable core [2023-11-29 05:04:45,087 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:04:45,313 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 05:04:45,313 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 40 treesize of output 40 [2023-11-29 05:04:45,510 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-11-29 05:04:45,510 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 05:04:46,096 INFO L349 Elim1Store]: treesize reduction 12, result has 94.1 percent of original size [2023-11-29 05:04:46,097 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 56 treesize of output 208 [2023-11-29 05:04:52,851 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-11-29 05:04:52,851 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [575112819] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 05:04:52,851 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 05:04:52,851 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 9] total 26 [2023-11-29 05:04:52,851 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1276664272] [2023-11-29 05:04:52,851 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 05:04:52,852 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-11-29 05:04:52,852 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:04:52,852 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-11-29 05:04:52,852 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=555, Unknown=0, NotChecked=0, Total=650 [2023-11-29 05:04:52,853 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 33 [2023-11-29 05:04:52,853 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 235 places, 376 transitions, 5958 flow. Second operand has 26 states, 26 states have (on average 6.538461538461538) internal successors, (170), 26 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:04:52,853 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 05:04:52,853 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 33 [2023-11-29 05:04:52,853 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 05:04:56,224 INFO L124 PetriNetUnfolderBase]: 5426/8139 cut-off events. [2023-11-29 05:04:56,225 INFO L125 PetriNetUnfolderBase]: For 240831/240831 co-relation queries the response was YES. [2023-11-29 05:04:56,298 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69918 conditions, 8139 events. 5426/8139 cut-off events. For 240831/240831 co-relation queries the response was YES. Maximal size of possible extension queue 446. Compared 45697 event pairs, 1271 based on Foata normal form. 3/8094 useless extension candidates. Maximal degree in co-relation 69749. Up to 6682 conditions per place. [2023-11-29 05:04:56,336 INFO L140 encePairwiseOnDemand]: 20/33 looper letters, 316 selfloop transitions, 151 changer transitions 6/474 dead transitions. [2023-11-29 05:04:56,336 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 255 places, 474 transitions, 7926 flow [2023-11-29 05:04:56,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-11-29 05:04:56,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2023-11-29 05:04:56,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 241 transitions. [2023-11-29 05:04:56,337 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3477633477633478 [2023-11-29 05:04:56,337 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 241 transitions. [2023-11-29 05:04:56,337 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 241 transitions. [2023-11-29 05:04:56,337 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 05:04:56,338 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 241 transitions. [2023-11-29 05:04:56,338 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 11.476190476190476) internal successors, (241), 21 states have internal predecessors, (241), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:04:56,339 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 33.0) internal successors, (726), 22 states have internal predecessors, (726), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:04:56,339 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 33.0) internal successors, (726), 22 states have internal predecessors, (726), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:04:56,339 INFO L175 Difference]: Start difference. First operand has 235 places, 376 transitions, 5958 flow. Second operand 21 states and 241 transitions. [2023-11-29 05:04:56,339 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 255 places, 474 transitions, 7926 flow [2023-11-29 05:04:57,216 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 244 places, 474 transitions, 7720 flow, removed 47 selfloop flow, removed 11 redundant places. [2023-11-29 05:04:57,224 INFO L231 Difference]: Finished difference. Result has 248 places, 391 transitions, 6453 flow [2023-11-29 05:04:57,224 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=5753, PETRI_DIFFERENCE_MINUEND_PLACES=224, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=376, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=139, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=233, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=6453, PETRI_PLACES=248, PETRI_TRANSITIONS=391} [2023-11-29 05:04:57,225 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 215 predicate places. [2023-11-29 05:04:57,225 INFO L495 AbstractCegarLoop]: Abstraction has has 248 places, 391 transitions, 6453 flow [2023-11-29 05:04:57,225 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 6.538461538461538) internal successors, (170), 26 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:04:57,225 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 05:04:57,225 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:04:57,230 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91e2605f-eff2-4533-a1b2-a84cc5102bbd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2023-11-29 05:04:57,425 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91e2605f-eff2-4533-a1b2-a84cc5102bbd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2023-11-29 05:04:57,426 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-29 05:04:57,426 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:04:57,426 INFO L85 PathProgramCache]: Analyzing trace with hash 1179575463, now seen corresponding path program 16 times [2023-11-29 05:04:57,426 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:04:57,426 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [335228869] [2023-11-29 05:04:57,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:04:57,426 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:04:57,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:04:58,216 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-11-29 05:04:58,216 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:04:58,217 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [335228869] [2023-11-29 05:04:58,217 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [335228869] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 05:04:58,217 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [531915252] [2023-11-29 05:04:58,217 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-29 05:04:58,217 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:04:58,217 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91e2605f-eff2-4533-a1b2-a84cc5102bbd/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:04:58,218 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91e2605f-eff2-4533-a1b2-a84cc5102bbd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:04:58,219 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91e2605f-eff2-4533-a1b2-a84cc5102bbd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2023-11-29 05:04:58,439 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-29 05:04:58,439 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 05:04:58,441 INFO L262 TraceCheckSpWp]: Trace formula consists of 464 conjuncts, 36 conjunts are in the unsatisfiable core [2023-11-29 05:04:58,443 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:04:58,664 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 05:04:58,665 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 40 treesize of output 40 [2023-11-29 05:04:58,683 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-11-29 05:04:58,683 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 05:04:59,131 INFO L349 Elim1Store]: treesize reduction 8, result has 96.1 percent of original size [2023-11-29 05:04:59,131 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 54 treesize of output 210 [2023-11-29 05:05:06,710 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-11-29 05:05:06,710 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [531915252] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 05:05:06,710 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 05:05:06,710 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 9] total 24 [2023-11-29 05:05:06,710 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1958676114] [2023-11-29 05:05:06,710 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 05:05:06,711 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-11-29 05:05:06,711 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:05:06,711 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-11-29 05:05:06,712 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=473, Unknown=0, NotChecked=0, Total=552 [2023-11-29 05:05:06,712 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 33 [2023-11-29 05:05:06,712 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 248 places, 391 transitions, 6453 flow. Second operand has 24 states, 24 states have (on average 6.541666666666667) internal successors, (157), 24 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:05:06,712 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 05:05:06,712 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 33 [2023-11-29 05:05:06,712 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 05:05:09,672 INFO L124 PetriNetUnfolderBase]: 5442/8181 cut-off events. [2023-11-29 05:05:09,672 INFO L125 PetriNetUnfolderBase]: For 255688/255688 co-relation queries the response was YES. [2023-11-29 05:05:09,757 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71979 conditions, 8181 events. 5442/8181 cut-off events. For 255688/255688 co-relation queries the response was YES. Maximal size of possible extension queue 449. Compared 46107 event pairs, 1319 based on Foata normal form. 2/8163 useless extension candidates. Maximal degree in co-relation 71806. Up to 6678 conditions per place. [2023-11-29 05:05:09,802 INFO L140 encePairwiseOnDemand]: 21/33 looper letters, 327 selfloop transitions, 142 changer transitions 2/472 dead transitions. [2023-11-29 05:05:09,802 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 264 places, 472 transitions, 8209 flow [2023-11-29 05:05:09,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-11-29 05:05:09,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2023-11-29 05:05:09,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 205 transitions. [2023-11-29 05:05:09,803 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36541889483065954 [2023-11-29 05:05:09,803 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 205 transitions. [2023-11-29 05:05:09,803 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 205 transitions. [2023-11-29 05:05:09,803 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 05:05:09,804 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 205 transitions. [2023-11-29 05:05:09,804 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 12.058823529411764) internal successors, (205), 17 states have internal predecessors, (205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:05:09,805 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 33.0) internal successors, (594), 18 states have internal predecessors, (594), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:05:09,805 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 33.0) internal successors, (594), 18 states have internal predecessors, (594), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:05:09,806 INFO L175 Difference]: Start difference. First operand has 248 places, 391 transitions, 6453 flow. Second operand 17 states and 205 transitions. [2023-11-29 05:05:09,806 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 264 places, 472 transitions, 8209 flow [2023-11-29 05:05:10,854 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 251 places, 472 transitions, 7931 flow, removed 65 selfloop flow, removed 13 redundant places. [2023-11-29 05:05:10,862 INFO L231 Difference]: Finished difference. Result has 253 places, 400 transitions, 6717 flow [2023-11-29 05:05:10,863 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=6175, PETRI_DIFFERENCE_MINUEND_PLACES=235, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=391, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=134, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=252, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=6717, PETRI_PLACES=253, PETRI_TRANSITIONS=400} [2023-11-29 05:05:10,863 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 220 predicate places. [2023-11-29 05:05:10,863 INFO L495 AbstractCegarLoop]: Abstraction has has 253 places, 400 transitions, 6717 flow [2023-11-29 05:05:10,864 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 6.541666666666667) internal successors, (157), 24 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:05:10,864 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 05:05:10,864 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:05:10,869 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91e2605f-eff2-4533-a1b2-a84cc5102bbd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2023-11-29 05:05:11,064 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91e2605f-eff2-4533-a1b2-a84cc5102bbd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2023-11-29 05:05:11,064 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-29 05:05:11,065 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:05:11,065 INFO L85 PathProgramCache]: Analyzing trace with hash 217874701, now seen corresponding path program 17 times [2023-11-29 05:05:11,065 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:05:11,065 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [321597638] [2023-11-29 05:05:11,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:05:11,065 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:05:11,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:05:11,843 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-11-29 05:05:11,843 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:05:11,843 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [321597638] [2023-11-29 05:05:11,844 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [321597638] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 05:05:11,844 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [524628910] [2023-11-29 05:05:11,844 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-29 05:05:11,844 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:05:11,844 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91e2605f-eff2-4533-a1b2-a84cc5102bbd/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:05:11,845 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91e2605f-eff2-4533-a1b2-a84cc5102bbd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:05:11,847 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91e2605f-eff2-4533-a1b2-a84cc5102bbd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2023-11-29 05:05:12,634 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2023-11-29 05:05:12,634 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 05:05:12,638 INFO L262 TraceCheckSpWp]: Trace formula consists of 464 conjuncts, 30 conjunts are in the unsatisfiable core [2023-11-29 05:05:12,640 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:05:12,930 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 05:05:12,931 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 40 treesize of output 48 [2023-11-29 05:05:12,960 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-11-29 05:05:12,960 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 05:05:13,562 INFO L349 Elim1Store]: treesize reduction 15, result has 95.3 percent of original size [2023-11-29 05:05:13,563 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 89 treesize of output 325 [2023-11-29 05:06:39,183 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-11-29 05:06:39,183 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [524628910] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 05:06:39,183 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 05:06:39,183 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 9] total 30 [2023-11-29 05:06:39,183 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [955567600] [2023-11-29 05:06:39,183 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 05:06:39,184 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2023-11-29 05:06:39,184 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:06:39,184 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2023-11-29 05:06:39,185 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=151, Invalid=719, Unknown=0, NotChecked=0, Total=870 [2023-11-29 05:06:39,185 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 33 [2023-11-29 05:06:39,185 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 253 places, 400 transitions, 6717 flow. Second operand has 30 states, 30 states have (on average 6.433333333333334) internal successors, (193), 30 states have internal predecessors, (193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:06:39,185 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 05:06:39,185 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 33 [2023-11-29 05:06:39,185 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 05:06:42,123 INFO L124 PetriNetUnfolderBase]: 5542/8335 cut-off events. [2023-11-29 05:06:42,124 INFO L125 PetriNetUnfolderBase]: For 284612/284612 co-relation queries the response was YES. [2023-11-29 05:06:42,219 INFO L83 FinitePrefix]: Finished finitePrefix Result has 74864 conditions, 8335 events. 5542/8335 cut-off events. For 284612/284612 co-relation queries the response was YES. Maximal size of possible extension queue 458. Compared 47195 event pairs, 1375 based on Foata normal form. 2/8317 useless extension candidates. Maximal degree in co-relation 74689. Up to 7102 conditions per place. [2023-11-29 05:06:42,259 INFO L140 encePairwiseOnDemand]: 21/33 looper letters, 327 selfloop transitions, 135 changer transitions 2/465 dead transitions. [2023-11-29 05:06:42,259 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 267 places, 465 transitions, 8259 flow [2023-11-29 05:06:42,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-11-29 05:06:42,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2023-11-29 05:06:42,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 177 transitions. [2023-11-29 05:06:42,260 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3575757575757576 [2023-11-29 05:06:42,260 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 177 transitions. [2023-11-29 05:06:42,260 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 177 transitions. [2023-11-29 05:06:42,261 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 05:06:42,261 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 177 transitions. [2023-11-29 05:06:42,261 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 11.8) internal successors, (177), 15 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:06:42,262 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 33.0) internal successors, (528), 16 states have internal predecessors, (528), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:06:42,262 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 33.0) internal successors, (528), 16 states have internal predecessors, (528), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:06:42,263 INFO L175 Difference]: Start difference. First operand has 253 places, 400 transitions, 6717 flow. Second operand 15 states and 177 transitions. [2023-11-29 05:06:42,263 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 267 places, 465 transitions, 8259 flow [2023-11-29 05:06:43,507 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 254 places, 465 transitions, 7957 flow, removed 71 selfloop flow, removed 13 redundant places. [2023-11-29 05:06:43,516 INFO L231 Difference]: Finished difference. Result has 258 places, 412 transitions, 6936 flow [2023-11-29 05:06:43,516 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=6418, PETRI_DIFFERENCE_MINUEND_PLACES=240, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=400, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=125, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=268, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=6936, PETRI_PLACES=258, PETRI_TRANSITIONS=412} [2023-11-29 05:06:43,516 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 225 predicate places. [2023-11-29 05:06:43,516 INFO L495 AbstractCegarLoop]: Abstraction has has 258 places, 412 transitions, 6936 flow [2023-11-29 05:06:43,517 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 6.433333333333334) internal successors, (193), 30 states have internal predecessors, (193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:06:43,517 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 05:06:43,517 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:06:43,522 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91e2605f-eff2-4533-a1b2-a84cc5102bbd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2023-11-29 05:06:43,717 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91e2605f-eff2-4533-a1b2-a84cc5102bbd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:06:43,717 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-29 05:06:43,718 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:06:43,718 INFO L85 PathProgramCache]: Analyzing trace with hash -469153175, now seen corresponding path program 18 times [2023-11-29 05:06:43,718 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:06:43,718 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1429708945] [2023-11-29 05:06:43,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:06:43,718 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:06:43,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:06:44,453 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-11-29 05:06:44,453 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:06:44,453 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1429708945] [2023-11-29 05:06:44,454 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1429708945] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 05:06:44,454 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [513886106] [2023-11-29 05:06:44,454 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-29 05:06:44,454 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:06:44,454 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91e2605f-eff2-4533-a1b2-a84cc5102bbd/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:06:44,455 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91e2605f-eff2-4533-a1b2-a84cc5102bbd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:06:44,456 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91e2605f-eff2-4533-a1b2-a84cc5102bbd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2023-11-29 05:06:44,826 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2023-11-29 05:06:44,826 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 05:06:44,829 INFO L262 TraceCheckSpWp]: Trace formula consists of 464 conjuncts, 38 conjunts are in the unsatisfiable core [2023-11-29 05:06:44,830 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:06:45,110 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 05:06:45,110 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 40 treesize of output 40 [2023-11-29 05:06:45,241 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-11-29 05:06:45,241 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 05:06:45,813 INFO L349 Elim1Store]: treesize reduction 12, result has 94.1 percent of original size [2023-11-29 05:06:45,813 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 56 treesize of output 208 [2023-11-29 05:06:52,300 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-11-29 05:06:52,300 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [513886106] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 05:06:52,300 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 05:06:52,300 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 9] total 26 [2023-11-29 05:06:52,300 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [872386128] [2023-11-29 05:06:52,300 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 05:06:52,301 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-11-29 05:06:52,301 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:06:52,301 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-11-29 05:06:52,302 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=559, Unknown=0, NotChecked=0, Total=650 [2023-11-29 05:06:52,302 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 33 [2023-11-29 05:06:52,302 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 258 places, 412 transitions, 6936 flow. Second operand has 26 states, 26 states have (on average 6.538461538461538) internal successors, (170), 26 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:06:52,302 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 05:06:52,302 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 33 [2023-11-29 05:06:52,302 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 05:06:56,318 INFO L124 PetriNetUnfolderBase]: 5754/8659 cut-off events. [2023-11-29 05:06:56,318 INFO L125 PetriNetUnfolderBase]: For 300694/300694 co-relation queries the response was YES. [2023-11-29 05:06:56,407 INFO L83 FinitePrefix]: Finished finitePrefix Result has 78728 conditions, 8659 events. 5754/8659 cut-off events. For 300694/300694 co-relation queries the response was YES. Maximal size of possible extension queue 472. Compared 49296 event pairs, 1349 based on Foata normal form. 4/8643 useless extension candidates. Maximal degree in co-relation 78550. Up to 6846 conditions per place. [2023-11-29 05:06:56,448 INFO L140 encePairwiseOnDemand]: 20/33 looper letters, 355 selfloop transitions, 160 changer transitions 5/521 dead transitions. [2023-11-29 05:06:56,448 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 279 places, 521 transitions, 9142 flow [2023-11-29 05:06:56,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-11-29 05:06:56,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2023-11-29 05:06:56,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 258 transitions. [2023-11-29 05:06:56,449 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35537190082644626 [2023-11-29 05:06:56,449 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 258 transitions. [2023-11-29 05:06:56,449 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 258 transitions. [2023-11-29 05:06:56,449 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 05:06:56,449 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 258 transitions. [2023-11-29 05:06:56,450 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 23 states, 22 states have (on average 11.727272727272727) internal successors, (258), 22 states have internal predecessors, (258), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:06:56,451 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 23 states, 23 states have (on average 33.0) internal successors, (759), 23 states have internal predecessors, (759), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:06:56,451 INFO L81 ComplementDD]: Finished complementDD. Result has 23 states, 23 states have (on average 33.0) internal successors, (759), 23 states have internal predecessors, (759), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:06:56,451 INFO L175 Difference]: Start difference. First operand has 258 places, 412 transitions, 6936 flow. Second operand 22 states and 258 transitions. [2023-11-29 05:06:56,451 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 279 places, 521 transitions, 9142 flow [2023-11-29 05:06:57,591 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 271 places, 521 transitions, 9007 flow, removed 23 selfloop flow, removed 8 redundant places. [2023-11-29 05:06:57,600 INFO L231 Difference]: Finished difference. Result has 274 places, 428 transitions, 7554 flow [2023-11-29 05:06:57,601 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=6801, PETRI_DIFFERENCE_MINUEND_PLACES=250, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=412, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=149, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=260, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=7554, PETRI_PLACES=274, PETRI_TRANSITIONS=428} [2023-11-29 05:06:57,601 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 241 predicate places. [2023-11-29 05:06:57,601 INFO L495 AbstractCegarLoop]: Abstraction has has 274 places, 428 transitions, 7554 flow [2023-11-29 05:06:57,601 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 6.538461538461538) internal successors, (170), 26 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:06:57,601 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 05:06:57,602 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:06:57,607 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91e2605f-eff2-4533-a1b2-a84cc5102bbd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2023-11-29 05:06:57,802 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91e2605f-eff2-4533-a1b2-a84cc5102bbd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:06:57,802 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-29 05:06:57,802 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:06:57,802 INFO L85 PathProgramCache]: Analyzing trace with hash -630747771, now seen corresponding path program 19 times [2023-11-29 05:06:57,802 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:06:57,802 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [974748765] [2023-11-29 05:06:57,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:06:57,803 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:06:57,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:06:58,674 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-11-29 05:06:58,675 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:06:58,675 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [974748765] [2023-11-29 05:06:58,675 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [974748765] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 05:06:58,675 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [928084164] [2023-11-29 05:06:58,675 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-29 05:06:58,675 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:06:58,675 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91e2605f-eff2-4533-a1b2-a84cc5102bbd/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:06:58,676 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91e2605f-eff2-4533-a1b2-a84cc5102bbd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:06:58,677 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91e2605f-eff2-4533-a1b2-a84cc5102bbd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2023-11-29 05:06:58,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:06:58,919 INFO L262 TraceCheckSpWp]: Trace formula consists of 464 conjuncts, 36 conjunts are in the unsatisfiable core [2023-11-29 05:06:58,921 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:06:59,201 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 05:06:59,202 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 40 treesize of output 40 [2023-11-29 05:06:59,227 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-11-29 05:06:59,227 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 05:06:59,676 INFO L349 Elim1Store]: treesize reduction 8, result has 96.5 percent of original size [2023-11-29 05:06:59,676 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 64 treesize of output 236 [2023-11-29 05:07:09,586 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-11-29 05:07:09,586 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [928084164] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 05:07:09,586 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 05:07:09,587 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 9] total 25 [2023-11-29 05:07:09,587 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [28820990] [2023-11-29 05:07:09,587 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 05:07:09,587 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-11-29 05:07:09,587 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:07:09,588 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-11-29 05:07:09,588 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=499, Unknown=0, NotChecked=0, Total=600 [2023-11-29 05:07:09,588 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 33 [2023-11-29 05:07:09,588 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 274 places, 428 transitions, 7554 flow. Second operand has 25 states, 25 states have (on average 6.44) internal successors, (161), 25 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:07:09,589 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 05:07:09,589 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 33 [2023-11-29 05:07:09,589 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 05:07:13,078 INFO L124 PetriNetUnfolderBase]: 5954/8963 cut-off events. [2023-11-29 05:07:13,078 INFO L125 PetriNetUnfolderBase]: For 334277/334277 co-relation queries the response was YES. [2023-11-29 05:07:13,161 INFO L83 FinitePrefix]: Finished finitePrefix Result has 83383 conditions, 8963 events. 5954/8963 cut-off events. For 334277/334277 co-relation queries the response was YES. Maximal size of possible extension queue 493. Compared 51429 event pairs, 1393 based on Foata normal form. 2/8931 useless extension candidates. Maximal degree in co-relation 83202. Up to 7456 conditions per place. [2023-11-29 05:07:13,201 INFO L140 encePairwiseOnDemand]: 21/33 looper letters, 347 selfloop transitions, 163 changer transitions 2/513 dead transitions. [2023-11-29 05:07:13,201 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 290 places, 513 transitions, 9499 flow [2023-11-29 05:07:13,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-11-29 05:07:13,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2023-11-29 05:07:13,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 201 transitions. [2023-11-29 05:07:13,202 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3582887700534759 [2023-11-29 05:07:13,203 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 201 transitions. [2023-11-29 05:07:13,203 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 201 transitions. [2023-11-29 05:07:13,203 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 05:07:13,203 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 201 transitions. [2023-11-29 05:07:13,203 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 11.823529411764707) internal successors, (201), 17 states have internal predecessors, (201), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:07:13,204 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 33.0) internal successors, (594), 18 states have internal predecessors, (594), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:07:13,205 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 33.0) internal successors, (594), 18 states have internal predecessors, (594), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:07:13,205 INFO L175 Difference]: Start difference. First operand has 274 places, 428 transitions, 7554 flow. Second operand 17 states and 201 transitions. [2023-11-29 05:07:13,205 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 290 places, 513 transitions, 9499 flow [2023-11-29 05:07:14,537 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 275 places, 513 transitions, 9141 flow, removed 90 selfloop flow, removed 15 redundant places. [2023-11-29 05:07:14,549 INFO L231 Difference]: Finished difference. Result has 279 places, 450 transitions, 8000 flow [2023-11-29 05:07:14,550 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=7201, PETRI_DIFFERENCE_MINUEND_PLACES=259, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=428, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=144, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=272, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=8000, PETRI_PLACES=279, PETRI_TRANSITIONS=450} [2023-11-29 05:07:14,550 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 246 predicate places. [2023-11-29 05:07:14,550 INFO L495 AbstractCegarLoop]: Abstraction has has 279 places, 450 transitions, 8000 flow [2023-11-29 05:07:14,550 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 6.44) internal successors, (161), 25 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:07:14,550 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 05:07:14,550 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:07:14,556 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91e2605f-eff2-4533-a1b2-a84cc5102bbd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Ended with exit code 0 [2023-11-29 05:07:14,751 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91e2605f-eff2-4533-a1b2-a84cc5102bbd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:07:14,751 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-29 05:07:14,751 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:07:14,752 INFO L85 PathProgramCache]: Analyzing trace with hash 1395124345, now seen corresponding path program 20 times [2023-11-29 05:07:14,752 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:07:14,752 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1172764175] [2023-11-29 05:07:14,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:07:14,752 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:07:14,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:07:15,539 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-11-29 05:07:15,539 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:07:15,539 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1172764175] [2023-11-29 05:07:15,539 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1172764175] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 05:07:15,539 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1710288326] [2023-11-29 05:07:15,539 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 05:07:15,540 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:07:15,540 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91e2605f-eff2-4533-a1b2-a84cc5102bbd/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:07:15,540 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91e2605f-eff2-4533-a1b2-a84cc5102bbd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:07:15,541 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91e2605f-eff2-4533-a1b2-a84cc5102bbd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2023-11-29 05:07:15,785 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-29 05:07:15,785 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 05:07:15,788 INFO L262 TraceCheckSpWp]: Trace formula consists of 464 conjuncts, 32 conjunts are in the unsatisfiable core [2023-11-29 05:07:15,789 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:07:16,188 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 05:07:16,188 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 59 treesize of output 75 [2023-11-29 05:07:16,293 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-11-29 05:07:16,293 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 05:07:16,916 INFO L349 Elim1Store]: treesize reduction 15, result has 95.3 percent of original size [2023-11-29 05:07:16,916 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 89 treesize of output 325 [2023-11-29 05:07:59,951 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-11-29 05:07:59,951 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1710288326] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 05:07:59,951 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 05:07:59,951 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 9] total 28 [2023-11-29 05:07:59,951 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [915434894] [2023-11-29 05:07:59,951 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 05:07:59,952 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2023-11-29 05:07:59,952 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:07:59,952 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2023-11-29 05:07:59,953 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=653, Unknown=0, NotChecked=0, Total=756 [2023-11-29 05:07:59,953 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 33 [2023-11-29 05:07:59,953 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 279 places, 450 transitions, 8000 flow. Second operand has 28 states, 28 states have (on average 6.428571428571429) internal successors, (180), 28 states have internal predecessors, (180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:07:59,953 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 05:07:59,953 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 33 [2023-11-29 05:07:59,953 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 05:08:03,630 INFO L124 PetriNetUnfolderBase]: 6084/9168 cut-off events. [2023-11-29 05:08:03,630 INFO L125 PetriNetUnfolderBase]: For 342837/342837 co-relation queries the response was YES. [2023-11-29 05:08:03,779 INFO L83 FinitePrefix]: Finished finitePrefix Result has 86298 conditions, 9168 events. 6084/9168 cut-off events. For 342837/342837 co-relation queries the response was YES. Maximal size of possible extension queue 503. Compared 52950 event pairs, 1467 based on Foata normal form. 3/9137 useless extension candidates. Maximal degree in co-relation 86113. Up to 7852 conditions per place. [2023-11-29 05:08:03,824 INFO L140 encePairwiseOnDemand]: 20/33 looper letters, 388 selfloop transitions, 143 changer transitions 3/535 dead transitions. [2023-11-29 05:08:03,825 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 296 places, 535 transitions, 9952 flow [2023-11-29 05:08:03,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-11-29 05:08:03,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2023-11-29 05:08:03,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 215 transitions. [2023-11-29 05:08:03,826 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36195286195286197 [2023-11-29 05:08:03,826 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 215 transitions. [2023-11-29 05:08:03,826 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 215 transitions. [2023-11-29 05:08:03,826 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 05:08:03,826 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 215 transitions. [2023-11-29 05:08:03,827 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 11.944444444444445) internal successors, (215), 18 states have internal predecessors, (215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:08:03,828 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 33.0) internal successors, (627), 19 states have internal predecessors, (627), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:08:03,828 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 33.0) internal successors, (627), 19 states have internal predecessors, (627), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:08:03,828 INFO L175 Difference]: Start difference. First operand has 279 places, 450 transitions, 8000 flow. Second operand 18 states and 215 transitions. [2023-11-29 05:08:03,828 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 296 places, 535 transitions, 9952 flow [2023-11-29 05:08:05,597 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 285 places, 535 transitions, 9698 flow, removed 41 selfloop flow, removed 11 redundant places. [2023-11-29 05:08:05,607 INFO L231 Difference]: Finished difference. Result has 290 places, 465 transitions, 8473 flow [2023-11-29 05:08:05,607 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=7746, PETRI_DIFFERENCE_MINUEND_PLACES=268, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=450, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=129, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=311, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=8473, PETRI_PLACES=290, PETRI_TRANSITIONS=465} [2023-11-29 05:08:05,608 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 257 predicate places. [2023-11-29 05:08:05,608 INFO L495 AbstractCegarLoop]: Abstraction has has 290 places, 465 transitions, 8473 flow [2023-11-29 05:08:05,608 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 6.428571428571429) internal successors, (180), 28 states have internal predecessors, (180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:08:05,608 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 05:08:05,608 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:08:05,613 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91e2605f-eff2-4533-a1b2-a84cc5102bbd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Ended with exit code 0 [2023-11-29 05:08:05,809 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91e2605f-eff2-4533-a1b2-a84cc5102bbd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:08:05,809 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-29 05:08:05,809 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:08:05,809 INFO L85 PathProgramCache]: Analyzing trace with hash 1991739461, now seen corresponding path program 21 times [2023-11-29 05:08:05,809 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:08:05,809 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [671963056] [2023-11-29 05:08:05,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:08:05,810 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:08:05,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:08:06,568 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-11-29 05:08:06,568 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:08:06,568 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [671963056] [2023-11-29 05:08:06,568 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [671963056] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 05:08:06,568 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1828820683] [2023-11-29 05:08:06,568 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-29 05:08:06,568 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:08:06,569 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91e2605f-eff2-4533-a1b2-a84cc5102bbd/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:08:06,569 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91e2605f-eff2-4533-a1b2-a84cc5102bbd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:08:06,570 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91e2605f-eff2-4533-a1b2-a84cc5102bbd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2023-11-29 05:08:06,823 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-11-29 05:08:06,823 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 05:08:06,825 INFO L262 TraceCheckSpWp]: Trace formula consists of 383 conjuncts, 34 conjunts are in the unsatisfiable core [2023-11-29 05:08:06,827 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:08:07,076 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 05:08:07,076 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 40 treesize of output 40 [2023-11-29 05:08:07,117 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-11-29 05:08:07,117 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 05:08:07,495 INFO L349 Elim1Store]: treesize reduction 8, result has 96.5 percent of original size [2023-11-29 05:08:07,495 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 64 treesize of output 236 [2023-11-29 05:08:20,771 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-11-29 05:08:20,771 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1828820683] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 05:08:20,771 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 05:08:20,771 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 9] total 25 [2023-11-29 05:08:20,771 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [999477321] [2023-11-29 05:08:20,771 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 05:08:20,772 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-11-29 05:08:20,772 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:08:20,772 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-11-29 05:08:20,773 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=507, Unknown=0, NotChecked=0, Total=600 [2023-11-29 05:08:20,773 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 33 [2023-11-29 05:08:20,773 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 290 places, 465 transitions, 8473 flow. Second operand has 25 states, 25 states have (on average 6.64) internal successors, (166), 25 states have internal predecessors, (166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:08:20,773 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 05:08:20,773 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 33 [2023-11-29 05:08:20,773 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 05:08:24,571 INFO L124 PetriNetUnfolderBase]: 6282/9468 cut-off events. [2023-11-29 05:08:24,572 INFO L125 PetriNetUnfolderBase]: For 411028/411028 co-relation queries the response was YES. [2023-11-29 05:08:24,663 INFO L83 FinitePrefix]: Finished finitePrefix Result has 92286 conditions, 9468 events. 6282/9468 cut-off events. For 411028/411028 co-relation queries the response was YES. Maximal size of possible extension queue 523. Compared 54991 event pairs, 1425 based on Foata normal form. 2/9422 useless extension candidates. Maximal degree in co-relation 92096. Up to 7921 conditions per place. [2023-11-29 05:08:24,833 INFO L140 encePairwiseOnDemand]: 21/33 looper letters, 380 selfloop transitions, 165 changer transitions 2/548 dead transitions. [2023-11-29 05:08:24,833 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 306 places, 548 transitions, 10449 flow [2023-11-29 05:08:24,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-11-29 05:08:24,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2023-11-29 05:08:24,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 203 transitions. [2023-11-29 05:08:24,834 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36185383244206776 [2023-11-29 05:08:24,834 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 203 transitions. [2023-11-29 05:08:24,834 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 203 transitions. [2023-11-29 05:08:24,834 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 05:08:24,835 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 203 transitions. [2023-11-29 05:08:24,835 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 11.941176470588236) internal successors, (203), 17 states have internal predecessors, (203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:08:24,836 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 33.0) internal successors, (594), 18 states have internal predecessors, (594), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:08:24,836 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 33.0) internal successors, (594), 18 states have internal predecessors, (594), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:08:24,836 INFO L175 Difference]: Start difference. First operand has 290 places, 465 transitions, 8473 flow. Second operand 17 states and 203 transitions. [2023-11-29 05:08:24,836 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 306 places, 548 transitions, 10449 flow [2023-11-29 05:08:26,433 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 295 places, 548 transitions, 9999 flow, removed 139 selfloop flow, removed 11 redundant places. [2023-11-29 05:08:26,446 INFO L231 Difference]: Finished difference. Result has 298 places, 484 transitions, 8782 flow [2023-11-29 05:08:26,446 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=8023, PETRI_DIFFERENCE_MINUEND_PLACES=279, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=465, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=149, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=305, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=8782, PETRI_PLACES=298, PETRI_TRANSITIONS=484} [2023-11-29 05:08:26,447 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 265 predicate places. [2023-11-29 05:08:26,447 INFO L495 AbstractCegarLoop]: Abstraction has has 298 places, 484 transitions, 8782 flow [2023-11-29 05:08:26,447 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 6.64) internal successors, (166), 25 states have internal predecessors, (166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:08:26,447 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 05:08:26,447 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:08:26,452 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91e2605f-eff2-4533-a1b2-a84cc5102bbd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Ended with exit code 0 [2023-11-29 05:08:26,647 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91e2605f-eff2-4533-a1b2-a84cc5102bbd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2023-11-29 05:08:26,648 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-29 05:08:26,648 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:08:26,648 INFO L85 PathProgramCache]: Analyzing trace with hash -974530415, now seen corresponding path program 22 times [2023-11-29 05:08:26,648 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:08:26,648 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [111943353] [2023-11-29 05:08:26,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:08:26,649 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:08:26,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:08:27,395 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-11-29 05:08:27,396 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:08:27,396 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [111943353] [2023-11-29 05:08:27,396 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [111943353] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 05:08:27,396 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [435311883] [2023-11-29 05:08:27,396 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-29 05:08:27,396 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:08:27,396 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91e2605f-eff2-4533-a1b2-a84cc5102bbd/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:08:27,397 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91e2605f-eff2-4533-a1b2-a84cc5102bbd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:08:27,398 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91e2605f-eff2-4533-a1b2-a84cc5102bbd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2023-11-29 05:08:27,648 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-29 05:08:27,648 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 05:08:27,651 INFO L262 TraceCheckSpWp]: Trace formula consists of 464 conjuncts, 36 conjunts are in the unsatisfiable core [2023-11-29 05:08:27,653 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:08:27,966 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 05:08:27,966 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 40 treesize of output 40 [2023-11-29 05:08:27,987 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-11-29 05:08:27,988 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 05:08:28,375 INFO L349 Elim1Store]: treesize reduction 8, result has 96.5 percent of original size [2023-11-29 05:08:28,375 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 64 treesize of output 236 [2023-11-29 05:08:42,022 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-11-29 05:08:42,022 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [435311883] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 05:08:42,022 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 05:08:42,022 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 9] total 25 [2023-11-29 05:08:42,022 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1029172910] [2023-11-29 05:08:42,023 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 05:08:42,023 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-11-29 05:08:42,023 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:08:42,023 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-11-29 05:08:42,024 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=507, Unknown=0, NotChecked=0, Total=600 [2023-11-29 05:08:42,024 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 33 [2023-11-29 05:08:42,024 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 298 places, 484 transitions, 8782 flow. Second operand has 25 states, 25 states have (on average 6.48) internal successors, (162), 25 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:08:42,024 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 05:08:42,024 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 33 [2023-11-29 05:08:42,024 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 05:08:45,878 INFO L124 PetriNetUnfolderBase]: 6312/9530 cut-off events. [2023-11-29 05:08:45,878 INFO L125 PetriNetUnfolderBase]: For 409353/409353 co-relation queries the response was YES. [2023-11-29 05:08:45,971 INFO L83 FinitePrefix]: Finished finitePrefix Result has 93229 conditions, 9530 events. 6312/9530 cut-off events. For 409353/409353 co-relation queries the response was YES. Maximal size of possible extension queue 529. Compared 55712 event pairs, 1342 based on Foata normal form. 2/9454 useless extension candidates. Maximal degree in co-relation 93036. Up to 7931 conditions per place. [2023-11-29 05:08:46,017 INFO L140 encePairwiseOnDemand]: 21/33 looper letters, 381 selfloop transitions, 170 changer transitions 2/554 dead transitions. [2023-11-29 05:08:46,017 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 314 places, 554 transitions, 10549 flow [2023-11-29 05:08:46,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-11-29 05:08:46,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2023-11-29 05:08:46,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 203 transitions. [2023-11-29 05:08:46,019 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36185383244206776 [2023-11-29 05:08:46,019 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 203 transitions. [2023-11-29 05:08:46,019 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 203 transitions. [2023-11-29 05:08:46,019 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 05:08:46,019 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 203 transitions. [2023-11-29 05:08:46,019 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 11.941176470588236) internal successors, (203), 17 states have internal predecessors, (203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:08:46,020 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 33.0) internal successors, (594), 18 states have internal predecessors, (594), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:08:46,020 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 33.0) internal successors, (594), 18 states have internal predecessors, (594), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:08:46,020 INFO L175 Difference]: Start difference. First operand has 298 places, 484 transitions, 8782 flow. Second operand 17 states and 203 transitions. [2023-11-29 05:08:46,020 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 314 places, 554 transitions, 10549 flow [2023-11-29 05:08:47,741 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 303 places, 554 transitions, 10280 flow, removed 60 selfloop flow, removed 11 redundant places. [2023-11-29 05:08:47,751 INFO L231 Difference]: Finished difference. Result has 306 places, 490 transitions, 9050 flow [2023-11-29 05:08:47,752 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=8513, PETRI_DIFFERENCE_MINUEND_PLACES=287, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=484, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=164, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=314, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=9050, PETRI_PLACES=306, PETRI_TRANSITIONS=490} [2023-11-29 05:08:47,752 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 273 predicate places. [2023-11-29 05:08:47,752 INFO L495 AbstractCegarLoop]: Abstraction has has 306 places, 490 transitions, 9050 flow [2023-11-29 05:08:47,752 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 6.48) internal successors, (162), 25 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:08:47,752 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 05:08:47,752 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:08:47,757 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91e2605f-eff2-4533-a1b2-a84cc5102bbd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Ended with exit code 0 [2023-11-29 05:08:47,953 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91e2605f-eff2-4533-a1b2-a84cc5102bbd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2023-11-29 05:08:47,953 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-29 05:08:47,953 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:08:47,953 INFO L85 PathProgramCache]: Analyzing trace with hash -253604293, now seen corresponding path program 23 times [2023-11-29 05:08:47,953 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:08:47,953 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1841298383] [2023-11-29 05:08:47,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:08:47,953 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:08:48,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:08:48,721 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-11-29 05:08:48,721 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:08:48,721 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1841298383] [2023-11-29 05:08:48,721 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1841298383] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 05:08:48,721 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1201189585] [2023-11-29 05:08:48,721 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-29 05:08:48,721 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:08:48,721 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91e2605f-eff2-4533-a1b2-a84cc5102bbd/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:08:48,722 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91e2605f-eff2-4533-a1b2-a84cc5102bbd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:08:48,723 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91e2605f-eff2-4533-a1b2-a84cc5102bbd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2023-11-29 05:08:49,661 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2023-11-29 05:08:49,661 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 05:08:49,665 INFO L262 TraceCheckSpWp]: Trace formula consists of 464 conjuncts, 36 conjunts are in the unsatisfiable core [2023-11-29 05:08:49,666 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:08:49,926 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 05:08:49,927 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 40 treesize of output 40 [2023-11-29 05:08:49,962 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-11-29 05:08:49,963 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 05:08:50,507 INFO L349 Elim1Store]: treesize reduction 15, result has 95.3 percent of original size [2023-11-29 05:08:50,508 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 89 treesize of output 325 [2023-11-29 05:09:18,403 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91e2605f-eff2-4533-a1b2-a84cc5102bbd/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Ended with exit code 101 [2023-11-29 05:09:18,403 WARN L249 Executor]: External (MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91e2605f-eff2-4533-a1b2-a84cc5102bbd/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1) with exit command (exit)) stderr output: (error "out of memory") [2023-11-29 05:09:18,404 WARN L320 FreeRefinementEngine]: Global settings require throwing the following exception [2023-11-29 05:09:18,411 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91e2605f-eff2-4533-a1b2-a84cc5102bbd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Ended with exit code 0 [2023-11-29 05:09:18,605 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91e2605f-eff2-4533-a1b2-a84cc5102bbd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2023-11-29 05:09:18,605 FATAL L? ?]: An unrecoverable error occured during an interaction with an SMT solver: de.uni_freiburg.informatik.ultimate.logic.SMTLIBException: External (MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91e2605f-eff2-4533-a1b2-a84cc5102bbd/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1) with exit command (exit)) Received EOF on stdin. stderr output: (error "out of memory") at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.parse(Executor.java:262) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.parseSuccess(Executor.java:277) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Scriptor.push(Scriptor.java:133) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.arrays.DiffWrapperScript.push(DiffWrapperScript.java:90) at de.uni_freiburg.informatik.ultimate.logic.WrapperScript.push(WrapperScript.java:148) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.scripttransfer.HistoryRecordingScript.push(HistoryRecordingScript.java:107) at de.uni_freiburg.informatik.ultimate.logic.Util.checkSat(Util.java:48) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.SimplifyDDA2.checkRedundancy(SimplifyDDA2.java:268) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.SimplifyDDA2.convertForPreprocessedInputTerms(SimplifyDDA2.java:410) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.SimplifyDDA2.convert(SimplifyDDA2.java:394) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.SimplifyDDA2.convert(SimplifyDDA2.java:1) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine.transform(TermContextTransformationEngine.java:88) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine.transform(TermContextTransformationEngine.java:84) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.SimplifyDDA2.simplify(SimplifyDDA2.java:500) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.SmtUtils.simplify(SmtUtils.java:252) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.SmtUtils.simplifyWithStatistics(SmtUtils.java:324) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify(QuantifierPusher.java:731) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushTermWalker.convert(QuantifierPushTermWalker.java:133) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushTermWalker.convert(QuantifierPushTermWalker.java:1) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine$ApplicationTermTask.doStep(TermContextTransformationEngine.java:209) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine.transform(TermContextTransformationEngine.java:100) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine.transform(TermContextTransformationEngine.java:84) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushTermWalker.eliminate(QuantifierPushTermWalker.java:297) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushUtilsForSubsetPush.pushMinionEliminatees(QuantifierPushUtilsForSubsetPush.java:255) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushUtilsForSubsetPush.sequentialSubsetPush(QuantifierPushUtilsForSubsetPush.java:151) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.tryToPushOverDualFiniteConnective(QuantifierPusher.java:338) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushTermWalker.convert(QuantifierPushTermWalker.java:189) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushTermWalker.convert(QuantifierPushTermWalker.java:1) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine.transform(TermContextTransformationEngine.java:88) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine.transform(TermContextTransformationEngine.java:84) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushTermWalker.eliminate(QuantifierPushTermWalker.java:297) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushTermWalker.eliminate(QuantifierPushTermWalker.java:283) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.PartialQuantifierElimination.eliminate(PartialQuantifierElimination.java:51) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.predicates.IterativePredicateTransformer$QuantifierEliminationPostprocessor.postprocess(IterativePredicateTransformer.java:238) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.predicates.IterativePredicateTransformer.applyPostprocessors(IterativePredicateTransformer.java:420) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.predicates.IterativePredicateTransformer.computeBackwardSequence(IterativePredicateTransformer.java:399) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.predicates.IterativePredicateTransformer.computeWeakestPreconditionSequence(IterativePredicateTransformer.java:271) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.TraceCheckSpWp.computeInterpolantsUsingUnsatCore(TraceCheckSpWp.java:341) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.TraceCheckSpWp.computeInterpolants(TraceCheckSpWp.java:184) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.TraceCheckSpWp.(TraceCheckSpWp.java:162) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSpWp.construct(IpTcStrategyModuleSpWp.java:110) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSpWp.construct(IpTcStrategyModuleSpWp.java:1) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:267) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:148) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:137) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:82) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:337) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:431) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:366) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:415) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:302) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseConcurrentProgram(TraceAbstractionStarter.java:225) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:173) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:154) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:167) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:150) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:127) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:233) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:227) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:144) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:106) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:319) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) Caused by: de.uni_freiburg.informatik.ultimate.logic.SMTLIBException: EOF at de.uni_freiburg.informatik.ultimate.smtsolver.external.Parser$Action$.CUP$do_action(Parser.java:1518) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Parser.do_action(Parser.java:701) at com.github.jhoenicke.javacup.runtime.LRParser.parse(LRParser.java:383) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.parse(Executor.java:258) ... 68 more [2023-11-29 05:09:18,626 INFO L158 Benchmark]: Toolchain (without parser) took 404510.80ms. Allocated memory was 172.0MB in the beginning and 3.1GB in the end (delta: 2.9GB). Free memory was 127.2MB in the beginning and 1.4GB in the end (delta: -1.3GB). Peak memory consumption was 1.8GB. Max. memory is 16.1GB. [2023-11-29 05:09:18,626 INFO L158 Benchmark]: CDTParser took 0.18ms. Allocated memory is still 121.6MB. Free memory is still 69.1MB. There was no memory consumed. Max. memory is 16.1GB. [2023-11-29 05:09:18,626 INFO L158 Benchmark]: CACSL2BoogieTranslator took 253.30ms. Allocated memory is still 172.0MB. Free memory was 127.2MB in the beginning and 114.7MB in the end (delta: 12.6MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2023-11-29 05:09:18,626 INFO L158 Benchmark]: Boogie Procedure Inliner took 50.26ms. Allocated memory is still 172.0MB. Free memory was 114.7MB in the beginning and 111.9MB in the end (delta: 2.8MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2023-11-29 05:09:18,626 INFO L158 Benchmark]: Boogie Preprocessor took 65.01ms. Allocated memory is still 172.0MB. Free memory was 111.9MB in the beginning and 108.4MB in the end (delta: 3.5MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2023-11-29 05:09:18,627 INFO L158 Benchmark]: RCFGBuilder took 981.46ms. Allocated memory is still 172.0MB. Free memory was 108.4MB in the beginning and 81.9MB in the end (delta: 26.5MB). Peak memory consumption was 40.5MB. Max. memory is 16.1GB. [2023-11-29 05:09:18,627 INFO L158 Benchmark]: TraceAbstraction took 403154.06ms. Allocated memory was 172.0MB in the beginning and 3.1GB in the end (delta: 2.9GB). Free memory was 81.6MB in the beginning and 1.4GB in the end (delta: -1.4GB). Peak memory consumption was 1.8GB. Max. memory is 16.1GB. [2023-11-29 05:09:18,628 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.18ms. Allocated memory is still 121.6MB. Free memory is still 69.1MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 253.30ms. Allocated memory is still 172.0MB. Free memory was 127.2MB in the beginning and 114.7MB in the end (delta: 12.6MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 50.26ms. Allocated memory is still 172.0MB. Free memory was 114.7MB in the beginning and 111.9MB in the end (delta: 2.8MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 65.01ms. Allocated memory is still 172.0MB. Free memory was 111.9MB in the beginning and 108.4MB in the end (delta: 3.5MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. * RCFGBuilder took 981.46ms. Allocated memory is still 172.0MB. Free memory was 108.4MB in the beginning and 81.9MB in the end (delta: 26.5MB). Peak memory consumption was 40.5MB. Max. memory is 16.1GB. * TraceAbstraction took 403154.06ms. Allocated memory was 172.0MB in the beginning and 3.1GB in the end (delta: 2.9GB). Free memory was 81.6MB in the beginning and 1.4GB in the end (delta: -1.4GB). Peak memory consumption was 1.8GB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: SMTLIBException: External (MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91e2605f-eff2-4533-a1b2-a84cc5102bbd/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1) with exit command (exit)) Received EOF on stdin. stderr output: (error "out of memory") de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMTLIBException: External (MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91e2605f-eff2-4533-a1b2-a84cc5102bbd/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1) with exit command (exit)) Received EOF on stdin. stderr output: (error "out of memory") : de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.parse(Executor.java:262) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91e2605f-eff2-4533-a1b2-a84cc5102bbd/bin/uautomizer-verify-BQ2R08f2Ya/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91e2605f-eff2-4533-a1b2-a84cc5102bbd/bin/uautomizer-verify-BQ2R08f2Ya/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91e2605f-eff2-4533-a1b2-a84cc5102bbd/bin/uautomizer-verify-BQ2R08f2Ya/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91e2605f-eff2-4533-a1b2-a84cc5102bbd/bin/uautomizer-verify-BQ2R08f2Ya/config/AutomizerReach.xml -i ../../sv-benchmarks/c/weaver/chl-chromosome-trans.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91e2605f-eff2-4533-a1b2-a84cc5102bbd/bin/uautomizer-verify-BQ2R08f2Ya/config/svcomp-Reach-32bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91e2605f-eff2-4533-a1b2-a84cc5102bbd/bin/uautomizer-verify-BQ2R08f2Ya --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 f36f5593156fc25b34b4c706b0d898a2d66ee8bab5f6d91cd69ff9cf3c129193 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-29 05:09:20,542 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-29 05:09:20,615 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91e2605f-eff2-4533-a1b2-a84cc5102bbd/bin/uautomizer-verify-BQ2R08f2Ya/config/svcomp-Reach-32bit-Automizer_Bitvector.epf [2023-11-29 05:09:20,631 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-29 05:09:20,632 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-29 05:09:20,659 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-29 05:09:20,660 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-29 05:09:20,661 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-29 05:09:20,661 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-29 05:09:20,662 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-29 05:09:20,662 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-29 05:09:20,663 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-29 05:09:20,664 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-29 05:09:20,665 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-29 05:09:20,665 INFO L153 SettingsManager]: * Use SBE=true [2023-11-29 05:09:20,666 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-29 05:09:20,666 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-29 05:09:20,667 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-29 05:09:20,667 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-29 05:09:20,668 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-29 05:09:20,668 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-29 05:09:20,669 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-29 05:09:20,670 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-29 05:09:20,670 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-11-29 05:09:20,671 INFO L153 SettingsManager]: * Use bitvectors instead of ints=true [2023-11-29 05:09:20,671 INFO L153 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2023-11-29 05:09:20,671 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-29 05:09:20,672 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-29 05:09:20,672 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-29 05:09:20,673 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-29 05:09:20,673 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-29 05:09:20,673 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-29 05:09:20,674 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-29 05:09:20,674 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-29 05:09:20,674 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-29 05:09:20,675 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-29 05:09:20,675 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-29 05:09:20,675 INFO L153 SettingsManager]: * Trace refinement strategy=WOLF [2023-11-29 05:09:20,675 INFO L153 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2023-11-29 05:09:20,676 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-29 05:09:20,676 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-29 05:09:20,676 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-29 05:09:20,676 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-29 05:09:20,677 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-29 05:09:20,677 INFO L153 SettingsManager]: * Logic for external solver=AUFBV [2023-11-29 05:09:20,677 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91e2605f-eff2-4533-a1b2-a84cc5102bbd/bin/uautomizer-verify-BQ2R08f2Ya/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91e2605f-eff2-4533-a1b2-a84cc5102bbd/bin/uautomizer-verify-BQ2R08f2Ya Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> f36f5593156fc25b34b4c706b0d898a2d66ee8bab5f6d91cd69ff9cf3c129193 [2023-11-29 05:09:20,983 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-29 05:09:21,006 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-29 05:09:21,008 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-29 05:09:21,009 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-29 05:09:21,010 INFO L274 PluginConnector]: CDTParser initialized [2023-11-29 05:09:21,011 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91e2605f-eff2-4533-a1b2-a84cc5102bbd/bin/uautomizer-verify-BQ2R08f2Ya/../../sv-benchmarks/c/weaver/chl-chromosome-trans.wvr.c [2023-11-29 05:09:23,804 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-29 05:09:23,998 INFO L384 CDTParser]: Found 1 translation units. [2023-11-29 05:09:23,999 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91e2605f-eff2-4533-a1b2-a84cc5102bbd/sv-benchmarks/c/weaver/chl-chromosome-trans.wvr.c [2023-11-29 05:09:24,008 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91e2605f-eff2-4533-a1b2-a84cc5102bbd/bin/uautomizer-verify-BQ2R08f2Ya/data/fc0531708/148eee9a27a549fb9300557b807f98f8/FLAGe4c1c148f [2023-11-29 05:09:24,025 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91e2605f-eff2-4533-a1b2-a84cc5102bbd/bin/uautomizer-verify-BQ2R08f2Ya/data/fc0531708/148eee9a27a549fb9300557b807f98f8 [2023-11-29 05:09:24,028 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-29 05:09:24,030 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-29 05:09:24,032 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-29 05:09:24,032 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-29 05:09:24,037 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-29 05:09:24,038 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 05:09:24" (1/1) ... [2023-11-29 05:09:24,039 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@63a9ffb0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 05:09:24, skipping insertion in model container [2023-11-29 05:09:24,039 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 05:09:24" (1/1) ... [2023-11-29 05:09:24,066 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-29 05:09:24,254 WARN L240 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_91e2605f-eff2-4533-a1b2-a84cc5102bbd/sv-benchmarks/c/weaver/chl-chromosome-trans.wvr.c[3073,3086] [2023-11-29 05:09:24,269 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-29 05:09:24,283 INFO L199 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2023-11-29 05:09:24,288 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-29 05:09:24,307 WARN L240 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_91e2605f-eff2-4533-a1b2-a84cc5102bbd/sv-benchmarks/c/weaver/chl-chromosome-trans.wvr.c[3073,3086] [2023-11-29 05:09:24,312 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-29 05:09:24,318 INFO L202 MainTranslator]: Completed pre-run [2023-11-29 05:09:24,345 WARN L240 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_91e2605f-eff2-4533-a1b2-a84cc5102bbd/sv-benchmarks/c/weaver/chl-chromosome-trans.wvr.c[3073,3086] [2023-11-29 05:09:24,351 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-29 05:09:24,370 INFO L206 MainTranslator]: Completed translation [2023-11-29 05:09:24,371 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 05:09:24 WrapperNode [2023-11-29 05:09:24,371 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-29 05:09:24,372 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-29 05:09:24,372 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-29 05:09:24,373 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-29 05:09:24,380 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 05:09:24" (1/1) ... [2023-11-29 05:09:24,393 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 05:09:24" (1/1) ... [2023-11-29 05:09:24,435 INFO L138 Inliner]: procedures = 28, calls = 46, calls flagged for inlining = 16, calls inlined = 24, statements flattened = 276 [2023-11-29 05:09:24,435 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-29 05:09:24,436 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-29 05:09:24,437 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-29 05:09:24,437 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-29 05:09:24,449 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 05:09:24" (1/1) ... [2023-11-29 05:09:24,450 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 05:09:24" (1/1) ... [2023-11-29 05:09:24,456 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 05:09:24" (1/1) ... [2023-11-29 05:09:24,474 INFO L175 MemorySlicer]: Split 17 memory accesses to 5 slices as follows [2, 2, 2, 2, 9]. 53 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0, 0, 0, 0]. The 6 writes are split as follows [0, 1, 1, 1, 3]. [2023-11-29 05:09:24,474 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 05:09:24" (1/1) ... [2023-11-29 05:09:24,475 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 05:09:24" (1/1) ... [2023-11-29 05:09:24,491 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 05:09:24" (1/1) ... [2023-11-29 05:09:24,496 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 05:09:24" (1/1) ... [2023-11-29 05:09:24,500 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 05:09:24" (1/1) ... [2023-11-29 05:09:24,502 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 05:09:24" (1/1) ... [2023-11-29 05:09:24,508 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-29 05:09:24,509 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-29 05:09:24,509 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-29 05:09:24,509 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-29 05:09:24,510 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 05:09:24" (1/1) ... [2023-11-29 05:09:24,516 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-29 05:09:24,529 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91e2605f-eff2-4533-a1b2-a84cc5102bbd/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:09:24,540 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91e2605f-eff2-4533-a1b2-a84cc5102bbd/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2023-11-29 05:09:24,552 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91e2605f-eff2-4533-a1b2-a84cc5102bbd/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2023-11-29 05:09:24,582 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-29 05:09:24,582 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1#0 [2023-11-29 05:09:24,583 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1#1 [2023-11-29 05:09:24,583 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1#2 [2023-11-29 05:09:24,583 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1#3 [2023-11-29 05:09:24,583 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1#4 [2023-11-29 05:09:24,583 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-29 05:09:24,584 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4#0 [2023-11-29 05:09:24,584 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4#1 [2023-11-29 05:09:24,584 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4#2 [2023-11-29 05:09:24,584 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4#3 [2023-11-29 05:09:24,584 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4#4 [2023-11-29 05:09:24,585 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-11-29 05:09:24,585 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-11-29 05:09:24,585 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-11-29 05:09:24,585 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-11-29 05:09:24,585 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2023-11-29 05:09:24,586 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2023-11-29 05:09:24,586 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-29 05:09:24,586 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-29 05:09:24,586 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-29 05:09:24,586 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-29 05:09:24,586 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4#0 [2023-11-29 05:09:24,587 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4#1 [2023-11-29 05:09:24,587 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4#2 [2023-11-29 05:09:24,587 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4#3 [2023-11-29 05:09:24,587 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4#4 [2023-11-29 05:09:24,589 WARN L213 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-11-29 05:09:24,728 INFO L241 CfgBuilder]: Building ICFG [2023-11-29 05:09:24,730 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-29 05:09:25,265 INFO L282 CfgBuilder]: Performing block encoding [2023-11-29 05:09:25,742 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-29 05:09:25,742 INFO L309 CfgBuilder]: Removed 6 assume(true) statements. [2023-11-29 05:09:25,743 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 05:09:25 BoogieIcfgContainer [2023-11-29 05:09:25,743 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-29 05:09:25,745 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-29 05:09:25,746 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-29 05:09:25,748 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-29 05:09:25,749 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.11 05:09:24" (1/3) ... [2023-11-29 05:09:25,749 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@61e1db9f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 05:09:25, skipping insertion in model container [2023-11-29 05:09:25,750 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 05:09:24" (2/3) ... [2023-11-29 05:09:25,750 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@61e1db9f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 05:09:25, skipping insertion in model container [2023-11-29 05:09:25,750 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 05:09:25" (3/3) ... [2023-11-29 05:09:25,751 INFO L112 eAbstractionObserver]: Analyzing ICFG chl-chromosome-trans.wvr.c [2023-11-29 05:09:25,760 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-11-29 05:09:25,771 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-29 05:09:25,771 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-29 05:09:25,771 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-29 05:09:25,841 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2023-11-29 05:09:25,875 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 37 places, 33 transitions, 87 flow [2023-11-29 05:09:25,906 INFO L124 PetriNetUnfolderBase]: 6/30 cut-off events. [2023-11-29 05:09:25,907 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-11-29 05:09:25,910 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43 conditions, 30 events. 6/30 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 18 event pairs, 0 based on Foata normal form. 0/23 useless extension candidates. Maximal degree in co-relation 21. Up to 2 conditions per place. [2023-11-29 05:09:25,910 INFO L82 GeneralOperation]: Start removeDead. Operand has 37 places, 33 transitions, 87 flow [2023-11-29 05:09:25,913 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 33 places, 29 transitions, 76 flow [2023-11-29 05:09:25,922 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-29 05:09:25,927 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopHeads, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@6888db7f, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-29 05:09:25,927 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2023-11-29 05:09:25,942 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-29 05:09:25,942 INFO L124 PetriNetUnfolderBase]: 6/28 cut-off events. [2023-11-29 05:09:25,942 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-11-29 05:09:25,943 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 05:09:25,943 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:09:25,944 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-29 05:09:25,948 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:09:25,949 INFO L85 PathProgramCache]: Analyzing trace with hash -1279864874, now seen corresponding path program 1 times [2023-11-29 05:09:25,974 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-29 05:09:25,975 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1703676968] [2023-11-29 05:09:25,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:09:25,975 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-29 05:09:25,976 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91e2605f-eff2-4533-a1b2-a84cc5102bbd/bin/uautomizer-verify-BQ2R08f2Ya/mathsat [2023-11-29 05:09:25,979 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91e2605f-eff2-4533-a1b2-a84cc5102bbd/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-29 05:09:26,006 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91e2605f-eff2-4533-a1b2-a84cc5102bbd/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2023-11-29 05:09:26,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:09:26,228 INFO L262 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-29 05:09:26,233 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:09:26,290 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:09:26,290 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 05:09:26,291 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-29 05:09:26,291 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1703676968] [2023-11-29 05:09:26,292 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1703676968] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 05:09:26,292 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 05:09:26,292 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-29 05:09:26,293 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [358884741] [2023-11-29 05:09:26,294 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 05:09:26,302 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 05:09:26,307 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-29 05:09:26,332 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 05:09:26,333 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 05:09:26,334 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 33 [2023-11-29 05:09:26,336 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 33 places, 29 transitions, 76 flow. Second operand has 3 states, 3 states have (on average 11.333333333333334) internal successors, (34), 3 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:09:26,336 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 05:09:26,337 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 33 [2023-11-29 05:09:26,338 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 05:09:26,641 INFO L124 PetriNetUnfolderBase]: 223/335 cut-off events. [2023-11-29 05:09:26,641 INFO L125 PetriNetUnfolderBase]: For 29/29 co-relation queries the response was YES. [2023-11-29 05:09:26,644 INFO L83 FinitePrefix]: Finished finitePrefix Result has 713 conditions, 335 events. 223/335 cut-off events. For 29/29 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 773 event pairs, 138 based on Foata normal form. 0/250 useless extension candidates. Maximal degree in co-relation 534. Up to 332 conditions per place. [2023-11-29 05:09:26,648 INFO L140 encePairwiseOnDemand]: 26/33 looper letters, 25 selfloop transitions, 6 changer transitions 0/32 dead transitions. [2023-11-29 05:09:26,648 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 35 places, 32 transitions, 144 flow [2023-11-29 05:09:26,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 05:09:26,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-29 05:09:26,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 46 transitions. [2023-11-29 05:09:26,660 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46464646464646464 [2023-11-29 05:09:26,661 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 46 transitions. [2023-11-29 05:09:26,662 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 46 transitions. [2023-11-29 05:09:26,662 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 05:09:26,665 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 46 transitions. [2023-11-29 05:09:26,667 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 15.333333333333334) internal successors, (46), 3 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:09:26,670 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 33.0) internal successors, (132), 4 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:09:26,670 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 33.0) internal successors, (132), 4 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:09:26,672 INFO L175 Difference]: Start difference. First operand has 33 places, 29 transitions, 76 flow. Second operand 3 states and 46 transitions. [2023-11-29 05:09:26,673 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 35 places, 32 transitions, 144 flow [2023-11-29 05:09:26,676 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 29 places, 32 transitions, 132 flow, removed 0 selfloop flow, removed 6 redundant places. [2023-11-29 05:09:26,678 INFO L231 Difference]: Finished difference. Result has 30 places, 32 transitions, 96 flow [2023-11-29 05:09:26,680 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=64, PETRI_DIFFERENCE_MINUEND_PLACES=27, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=96, PETRI_PLACES=30, PETRI_TRANSITIONS=32} [2023-11-29 05:09:26,684 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, -3 predicate places. [2023-11-29 05:09:26,684 INFO L495 AbstractCegarLoop]: Abstraction has has 30 places, 32 transitions, 96 flow [2023-11-29 05:09:26,684 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 11.333333333333334) internal successors, (34), 3 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:09:26,684 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 05:09:26,684 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:09:26,689 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91e2605f-eff2-4533-a1b2-a84cc5102bbd/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2023-11-29 05:09:26,885 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91e2605f-eff2-4533-a1b2-a84cc5102bbd/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-29 05:09:26,885 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-29 05:09:26,886 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:09:26,886 INFO L85 PathProgramCache]: Analyzing trace with hash -1152442264, now seen corresponding path program 1 times [2023-11-29 05:09:26,887 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-29 05:09:26,888 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1659796940] [2023-11-29 05:09:26,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:09:26,888 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-29 05:09:26,888 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91e2605f-eff2-4533-a1b2-a84cc5102bbd/bin/uautomizer-verify-BQ2R08f2Ya/mathsat [2023-11-29 05:09:26,889 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91e2605f-eff2-4533-a1b2-a84cc5102bbd/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-29 05:09:26,891 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91e2605f-eff2-4533-a1b2-a84cc5102bbd/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2023-11-29 05:09:27,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:09:27,073 INFO L262 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-29 05:09:27,076 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:09:27,116 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-29 05:09:27,116 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 05:09:27,160 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-29 05:09:27,161 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-29 05:09:27,161 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1659796940] [2023-11-29 05:09:27,161 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1659796940] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 05:09:27,162 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 05:09:27,162 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 5 [2023-11-29 05:09:27,162 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1490459411] [2023-11-29 05:09:27,162 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 05:09:27,164 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-29 05:09:27,164 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-29 05:09:27,165 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-29 05:09:27,165 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-11-29 05:09:27,165 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 33 [2023-11-29 05:09:27,166 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 30 places, 32 transitions, 96 flow. Second operand has 6 states, 6 states have (on average 8.666666666666666) internal successors, (52), 6 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:09:27,166 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 05:09:27,166 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 33 [2023-11-29 05:09:27,166 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 05:09:27,667 INFO L124 PetriNetUnfolderBase]: 223/344 cut-off events. [2023-11-29 05:09:27,667 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2023-11-29 05:09:27,668 INFO L83 FinitePrefix]: Finished finitePrefix Result has 726 conditions, 344 events. 223/344 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 770 event pairs, 138 based on Foata normal form. 6/267 useless extension candidates. Maximal degree in co-relation 677. Up to 332 conditions per place. [2023-11-29 05:09:27,671 INFO L140 encePairwiseOnDemand]: 26/33 looper letters, 25 selfloop transitions, 15 changer transitions 0/41 dead transitions. [2023-11-29 05:09:27,671 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 35 places, 41 transitions, 212 flow [2023-11-29 05:09:27,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-29 05:09:27,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-29 05:09:27,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 73 transitions. [2023-11-29 05:09:27,673 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3686868686868687 [2023-11-29 05:09:27,674 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 73 transitions. [2023-11-29 05:09:27,674 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 73 transitions. [2023-11-29 05:09:27,674 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 05:09:27,674 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 73 transitions. [2023-11-29 05:09:27,675 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 12.166666666666666) internal successors, (73), 6 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:09:27,676 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 33.0) internal successors, (231), 7 states have internal predecessors, (231), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:09:27,677 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 33.0) internal successors, (231), 7 states have internal predecessors, (231), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:09:27,677 INFO L175 Difference]: Start difference. First operand has 30 places, 32 transitions, 96 flow. Second operand 6 states and 73 transitions. [2023-11-29 05:09:27,677 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 35 places, 41 transitions, 212 flow [2023-11-29 05:09:27,678 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 34 places, 41 transitions, 206 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-29 05:09:27,680 INFO L231 Difference]: Finished difference. Result has 37 places, 41 transitions, 186 flow [2023-11-29 05:09:27,680 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=90, PETRI_DIFFERENCE_MINUEND_PLACES=29, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=186, PETRI_PLACES=37, PETRI_TRANSITIONS=41} [2023-11-29 05:09:27,681 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 4 predicate places. [2023-11-29 05:09:27,681 INFO L495 AbstractCegarLoop]: Abstraction has has 37 places, 41 transitions, 186 flow [2023-11-29 05:09:27,682 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 8.666666666666666) internal successors, (52), 6 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:09:27,682 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 05:09:27,682 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:09:27,685 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91e2605f-eff2-4533-a1b2-a84cc5102bbd/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Ended with exit code 0 [2023-11-29 05:09:27,885 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91e2605f-eff2-4533-a1b2-a84cc5102bbd/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-29 05:09:27,886 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-29 05:09:27,886 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:09:27,886 INFO L85 PathProgramCache]: Analyzing trace with hash 155874994, now seen corresponding path program 2 times [2023-11-29 05:09:27,887 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-29 05:09:27,887 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [313898375] [2023-11-29 05:09:27,887 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 05:09:27,887 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-29 05:09:27,888 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91e2605f-eff2-4533-a1b2-a84cc5102bbd/bin/uautomizer-verify-BQ2R08f2Ya/mathsat [2023-11-29 05:09:27,888 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91e2605f-eff2-4533-a1b2-a84cc5102bbd/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-29 05:09:27,889 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91e2605f-eff2-4533-a1b2-a84cc5102bbd/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2023-11-29 05:09:28,050 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-11-29 05:09:28,051 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 05:09:28,056 INFO L262 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-29 05:09:28,058 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:09:28,091 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-11-29 05:09:28,091 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 05:09:28,091 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-29 05:09:28,092 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [313898375] [2023-11-29 05:09:28,092 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [313898375] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 05:09:28,092 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 05:09:28,092 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-29 05:09:28,092 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [686657715] [2023-11-29 05:09:28,093 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 05:09:28,093 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-29 05:09:28,093 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-29 05:09:28,094 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-29 05:09:28,094 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-29 05:09:28,094 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 33 [2023-11-29 05:09:28,094 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 37 places, 41 transitions, 186 flow. Second operand has 4 states, 4 states have (on average 10.25) internal successors, (41), 4 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:09:28,095 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 05:09:28,095 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 33 [2023-11-29 05:09:28,095 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 05:09:28,552 INFO L124 PetriNetUnfolderBase]: 369/569 cut-off events. [2023-11-29 05:09:28,553 INFO L125 PetriNetUnfolderBase]: For 7/7 co-relation queries the response was YES. [2023-11-29 05:09:28,554 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1213 conditions, 569 events. 369/569 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 1704 event pairs, 138 based on Foata normal form. 14/431 useless extension candidates. Maximal degree in co-relation 1125. Up to 344 conditions per place. [2023-11-29 05:09:28,558 INFO L140 encePairwiseOnDemand]: 29/33 looper letters, 64 selfloop transitions, 3 changer transitions 2/70 dead transitions. [2023-11-29 05:09:28,558 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 40 places, 70 transitions, 389 flow [2023-11-29 05:09:28,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-29 05:09:28,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-29 05:09:28,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 74 transitions. [2023-11-29 05:09:28,560 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5606060606060606 [2023-11-29 05:09:28,560 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 74 transitions. [2023-11-29 05:09:28,560 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 74 transitions. [2023-11-29 05:09:28,561 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 05:09:28,561 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 74 transitions. [2023-11-29 05:09:28,562 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 18.5) internal successors, (74), 4 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:09:28,562 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 33.0) internal successors, (165), 5 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:09:28,563 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 33.0) internal successors, (165), 5 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:09:28,563 INFO L175 Difference]: Start difference. First operand has 37 places, 41 transitions, 186 flow. Second operand 4 states and 74 transitions. [2023-11-29 05:09:28,563 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 40 places, 70 transitions, 389 flow [2023-11-29 05:09:28,565 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 39 places, 70 transitions, 365 flow, removed 9 selfloop flow, removed 1 redundant places. [2023-11-29 05:09:28,567 INFO L231 Difference]: Finished difference. Result has 41 places, 43 transitions, 182 flow [2023-11-29 05:09:28,568 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=162, PETRI_DIFFERENCE_MINUEND_PLACES=36, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=182, PETRI_PLACES=41, PETRI_TRANSITIONS=43} [2023-11-29 05:09:28,568 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 8 predicate places. [2023-11-29 05:09:28,569 INFO L495 AbstractCegarLoop]: Abstraction has has 41 places, 43 transitions, 182 flow [2023-11-29 05:09:28,569 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 10.25) internal successors, (41), 4 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:09:28,569 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 05:09:28,569 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:09:28,572 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91e2605f-eff2-4533-a1b2-a84cc5102bbd/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Ended with exit code 0 [2023-11-29 05:09:28,769 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91e2605f-eff2-4533-a1b2-a84cc5102bbd/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-29 05:09:28,770 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-29 05:09:28,770 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:09:28,770 INFO L85 PathProgramCache]: Analyzing trace with hash -1594488576, now seen corresponding path program 3 times [2023-11-29 05:09:28,771 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-29 05:09:28,771 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [72798001] [2023-11-29 05:09:28,771 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-29 05:09:28,771 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-29 05:09:28,771 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91e2605f-eff2-4533-a1b2-a84cc5102bbd/bin/uautomizer-verify-BQ2R08f2Ya/mathsat [2023-11-29 05:09:28,772 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91e2605f-eff2-4533-a1b2-a84cc5102bbd/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-29 05:09:28,773 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91e2605f-eff2-4533-a1b2-a84cc5102bbd/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2023-11-29 05:09:28,925 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2023-11-29 05:09:28,926 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 05:09:28,931 INFO L262 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-29 05:09:28,933 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:09:29,009 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-11-29 05:09:29,009 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 05:09:29,009 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-29 05:09:29,010 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [72798001] [2023-11-29 05:09:29,010 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [72798001] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 05:09:29,010 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 05:09:29,010 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-29 05:09:29,010 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1892507243] [2023-11-29 05:09:29,011 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 05:09:29,011 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-29 05:09:29,011 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-29 05:09:29,012 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-29 05:09:29,012 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-11-29 05:09:29,012 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 33 [2023-11-29 05:09:29,013 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 43 transitions, 182 flow. Second operand has 6 states, 6 states have (on average 8.166666666666666) internal successors, (49), 6 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:09:29,013 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 05:09:29,013 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 33 [2023-11-29 05:09:29,013 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 05:09:29,985 INFO L124 PetriNetUnfolderBase]: 894/1332 cut-off events. [2023-11-29 05:09:29,985 INFO L125 PetriNetUnfolderBase]: For 509/509 co-relation queries the response was YES. [2023-11-29 05:09:29,988 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3178 conditions, 1332 events. 894/1332 cut-off events. For 509/509 co-relation queries the response was YES. Maximal size of possible extension queue 67. Compared 4965 event pairs, 242 based on Foata normal form. 2/988 useless extension candidates. Maximal degree in co-relation 3099. Up to 628 conditions per place. [2023-11-29 05:09:29,995 INFO L140 encePairwiseOnDemand]: 26/33 looper letters, 96 selfloop transitions, 14 changer transitions 15/126 dead transitions. [2023-11-29 05:09:29,996 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 126 transitions, 698 flow [2023-11-29 05:09:29,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-29 05:09:29,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-11-29 05:09:30,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 133 transitions. [2023-11-29 05:09:30,001 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5037878787878788 [2023-11-29 05:09:30,001 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 133 transitions. [2023-11-29 05:09:30,002 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 133 transitions. [2023-11-29 05:09:30,002 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 05:09:30,002 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 133 transitions. [2023-11-29 05:09:30,003 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 16.625) internal successors, (133), 8 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:09:30,004 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 33.0) internal successors, (297), 9 states have internal predecessors, (297), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:09:30,005 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 33.0) internal successors, (297), 9 states have internal predecessors, (297), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:09:30,005 INFO L175 Difference]: Start difference. First operand has 41 places, 43 transitions, 182 flow. Second operand 8 states and 133 transitions. [2023-11-29 05:09:30,005 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 126 transitions, 698 flow [2023-11-29 05:09:30,008 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 126 transitions, 670 flow, removed 7 selfloop flow, removed 1 redundant places. [2023-11-29 05:09:30,010 INFO L231 Difference]: Finished difference. Result has 52 places, 55 transitions, 276 flow [2023-11-29 05:09:30,011 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=178, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=276, PETRI_PLACES=52, PETRI_TRANSITIONS=55} [2023-11-29 05:09:30,011 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 19 predicate places. [2023-11-29 05:09:30,011 INFO L495 AbstractCegarLoop]: Abstraction has has 52 places, 55 transitions, 276 flow [2023-11-29 05:09:30,012 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 8.166666666666666) internal successors, (49), 6 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:09:30,012 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 05:09:30,012 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:09:30,015 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91e2605f-eff2-4533-a1b2-a84cc5102bbd/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (5)] Ended with exit code 0 [2023-11-29 05:09:30,212 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91e2605f-eff2-4533-a1b2-a84cc5102bbd/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-29 05:09:30,213 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-29 05:09:30,213 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:09:30,213 INFO L85 PathProgramCache]: Analyzing trace with hash 635134370, now seen corresponding path program 4 times [2023-11-29 05:09:30,213 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-29 05:09:30,214 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1508314316] [2023-11-29 05:09:30,214 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-29 05:09:30,214 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-29 05:09:30,214 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91e2605f-eff2-4533-a1b2-a84cc5102bbd/bin/uautomizer-verify-BQ2R08f2Ya/mathsat [2023-11-29 05:09:30,215 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91e2605f-eff2-4533-a1b2-a84cc5102bbd/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-29 05:09:30,216 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91e2605f-eff2-4533-a1b2-a84cc5102bbd/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2023-11-29 05:09:30,408 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-29 05:09:30,408 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 05:09:30,415 INFO L262 TraceCheckSpWp]: Trace formula consists of 269 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-29 05:09:30,418 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:09:30,489 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2023-11-29 05:09:30,489 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 05:09:30,673 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2023-11-29 05:09:30,673 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-29 05:09:30,673 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1508314316] [2023-11-29 05:09:30,674 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1508314316] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 05:09:30,674 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 05:09:30,674 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2023-11-29 05:09:30,674 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1611211573] [2023-11-29 05:09:30,674 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 05:09:30,675 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-29 05:09:30,675 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-29 05:09:30,676 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-29 05:09:30,676 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2023-11-29 05:09:30,676 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 33 [2023-11-29 05:09:30,676 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 55 transitions, 276 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) [2023-11-29 05:09:30,676 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 05:09:30,677 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 33 [2023-11-29 05:09:30,677 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 05:09:31,418 INFO L124 PetriNetUnfolderBase]: 848/1251 cut-off events. [2023-11-29 05:09:31,418 INFO L125 PetriNetUnfolderBase]: For 1794/1794 co-relation queries the response was YES. [2023-11-29 05:09:31,420 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4417 conditions, 1251 events. 848/1251 cut-off events. For 1794/1794 co-relation queries the response was YES. Maximal size of possible extension queue 59. Compared 4321 event pairs, 483 based on Foata normal form. 1/1002 useless extension candidates. Maximal degree in co-relation 4321. Up to 1233 conditions per place. [2023-11-29 05:09:31,427 INFO L140 encePairwiseOnDemand]: 26/33 looper letters, 39 selfloop transitions, 18 changer transitions 0/58 dead transitions. [2023-11-29 05:09:31,427 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 58 transitions, 408 flow [2023-11-29 05:09:31,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-29 05:09:31,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-11-29 05:09:31,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 74 transitions. [2023-11-29 05:09:31,429 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3203463203463203 [2023-11-29 05:09:31,429 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 74 transitions. [2023-11-29 05:09:31,429 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 74 transitions. [2023-11-29 05:09:31,429 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 05:09:31,429 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 74 transitions. [2023-11-29 05:09:31,430 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 10.571428571428571) internal successors, (74), 7 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:09:31,431 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 33.0) internal successors, (264), 8 states have internal predecessors, (264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:09:31,431 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 33.0) internal successors, (264), 8 states have internal predecessors, (264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:09:31,431 INFO L175 Difference]: Start difference. First operand has 52 places, 55 transitions, 276 flow. Second operand 7 states and 74 transitions. [2023-11-29 05:09:31,432 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 58 transitions, 408 flow [2023-11-29 05:09:31,438 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 58 transitions, 394 flow, removed 7 selfloop flow, removed 1 redundant places. [2023-11-29 05:09:31,440 INFO L231 Difference]: Finished difference. Result has 57 places, 58 transitions, 330 flow [2023-11-29 05:09:31,440 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=262, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=330, PETRI_PLACES=57, PETRI_TRANSITIONS=58} [2023-11-29 05:09:31,441 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 24 predicate places. [2023-11-29 05:09:31,441 INFO L495 AbstractCegarLoop]: Abstraction has has 57 places, 58 transitions, 330 flow [2023-11-29 05:09:31,441 INFO L496 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) [2023-11-29 05:09:31,441 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 05:09:31,441 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:09:31,445 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91e2605f-eff2-4533-a1b2-a84cc5102bbd/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (6)] Ended with exit code 0 [2023-11-29 05:09:31,643 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91e2605f-eff2-4533-a1b2-a84cc5102bbd/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-29 05:09:31,643 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-29 05:09:31,643 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:09:31,644 INFO L85 PathProgramCache]: Analyzing trace with hash 1152626218, now seen corresponding path program 5 times [2023-11-29 05:09:31,644 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-29 05:09:31,644 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [397996303] [2023-11-29 05:09:31,644 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-29 05:09:31,644 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-29 05:09:31,644 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91e2605f-eff2-4533-a1b2-a84cc5102bbd/bin/uautomizer-verify-BQ2R08f2Ya/mathsat [2023-11-29 05:09:31,645 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91e2605f-eff2-4533-a1b2-a84cc5102bbd/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-29 05:09:31,646 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91e2605f-eff2-4533-a1b2-a84cc5102bbd/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2023-11-29 05:09:31,966 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2023-11-29 05:09:31,967 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 05:09:31,979 INFO L262 TraceCheckSpWp]: Trace formula consists of 293 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-29 05:09:31,981 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:09:32,015 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-11-29 05:09:32,015 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 05:09:32,015 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-29 05:09:32,016 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [397996303] [2023-11-29 05:09:32,016 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [397996303] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 05:09:32,016 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 05:09:32,016 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-29 05:09:32,016 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [484198229] [2023-11-29 05:09:32,017 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 05:09:32,017 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-29 05:09:32,017 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-29 05:09:32,018 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-29 05:09:32,018 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-29 05:09:32,018 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 33 [2023-11-29 05:09:32,018 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 58 transitions, 330 flow. Second operand has 4 states, 4 states have (on average 10.25) internal successors, (41), 4 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:09:32,019 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 05:09:32,019 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 33 [2023-11-29 05:09:32,019 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 05:09:32,451 INFO L124 PetriNetUnfolderBase]: 939/1424 cut-off events. [2023-11-29 05:09:32,451 INFO L125 PetriNetUnfolderBase]: For 1371/1371 co-relation queries the response was YES. [2023-11-29 05:09:32,455 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4731 conditions, 1424 events. 939/1424 cut-off events. For 1371/1371 co-relation queries the response was YES. Maximal size of possible extension queue 70. Compared 5423 event pairs, 412 based on Foata normal form. 4/1208 useless extension candidates. Maximal degree in co-relation 4615. Up to 941 conditions per place. [2023-11-29 05:09:32,464 INFO L140 encePairwiseOnDemand]: 30/33 looper letters, 61 selfloop transitions, 5 changer transitions 7/74 dead transitions. [2023-11-29 05:09:32,464 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 74 transitions, 538 flow [2023-11-29 05:09:32,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 05:09:32,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-29 05:09:32,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 55 transitions. [2023-11-29 05:09:32,466 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5555555555555556 [2023-11-29 05:09:32,466 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 55 transitions. [2023-11-29 05:09:32,466 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 55 transitions. [2023-11-29 05:09:32,466 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 05:09:32,467 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 55 transitions. [2023-11-29 05:09:32,467 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 18.333333333333332) internal successors, (55), 3 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:09:32,468 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 33.0) internal successors, (132), 4 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:09:32,468 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 33.0) internal successors, (132), 4 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:09:32,468 INFO L175 Difference]: Start difference. First operand has 57 places, 58 transitions, 330 flow. Second operand 3 states and 55 transitions. [2023-11-29 05:09:32,468 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 74 transitions, 538 flow [2023-11-29 05:09:32,474 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 74 transitions, 502 flow, removed 6 selfloop flow, removed 4 redundant places. [2023-11-29 05:09:32,476 INFO L231 Difference]: Finished difference. Result has 56 places, 55 transitions, 295 flow [2023-11-29 05:09:32,476 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=294, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=295, PETRI_PLACES=56, PETRI_TRANSITIONS=55} [2023-11-29 05:09:32,477 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 23 predicate places. [2023-11-29 05:09:32,477 INFO L495 AbstractCegarLoop]: Abstraction has has 56 places, 55 transitions, 295 flow [2023-11-29 05:09:32,477 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 10.25) internal successors, (41), 4 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:09:32,478 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 05:09:32,478 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:09:32,484 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91e2605f-eff2-4533-a1b2-a84cc5102bbd/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (7)] Ended with exit code 0 [2023-11-29 05:09:32,678 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91e2605f-eff2-4533-a1b2-a84cc5102bbd/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-29 05:09:32,679 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-29 05:09:32,679 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:09:32,679 INFO L85 PathProgramCache]: Analyzing trace with hash 1302919250, now seen corresponding path program 1 times [2023-11-29 05:09:32,680 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-29 05:09:32,680 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [960707001] [2023-11-29 05:09:32,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:09:32,680 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-29 05:09:32,680 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91e2605f-eff2-4533-a1b2-a84cc5102bbd/bin/uautomizer-verify-BQ2R08f2Ya/mathsat [2023-11-29 05:09:32,681 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91e2605f-eff2-4533-a1b2-a84cc5102bbd/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-29 05:09:32,682 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91e2605f-eff2-4533-a1b2-a84cc5102bbd/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2023-11-29 05:09:32,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:09:32,971 INFO L262 TraceCheckSpWp]: Trace formula consists of 301 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-29 05:09:32,974 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:09:33,027 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-11-29 05:09:33,027 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 05:09:33,028 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-29 05:09:33,028 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [960707001] [2023-11-29 05:09:33,028 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [960707001] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 05:09:33,028 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 05:09:33,028 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-29 05:09:33,029 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2030809999] [2023-11-29 05:09:33,029 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 05:09:33,029 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-29 05:09:33,029 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-29 05:09:33,030 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-29 05:09:33,030 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-29 05:09:33,030 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 33 [2023-11-29 05:09:33,030 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 55 transitions, 295 flow. Second operand has 4 states, 4 states have (on average 10.5) internal successors, (42), 4 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:09:33,030 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 05:09:33,030 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 33 [2023-11-29 05:09:33,030 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 05:09:33,518 INFO L124 PetriNetUnfolderBase]: 864/1307 cut-off events. [2023-11-29 05:09:33,518 INFO L125 PetriNetUnfolderBase]: For 1888/1888 co-relation queries the response was YES. [2023-11-29 05:09:33,521 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4537 conditions, 1307 events. 864/1307 cut-off events. For 1888/1888 co-relation queries the response was YES. Maximal size of possible extension queue 62. Compared 4985 event pairs, 287 based on Foata normal form. 40/1133 useless extension candidates. Maximal degree in co-relation 4437. Up to 732 conditions per place. [2023-11-29 05:09:33,527 INFO L140 encePairwiseOnDemand]: 29/33 looper letters, 92 selfloop transitions, 5 changer transitions 0/98 dead transitions. [2023-11-29 05:09:33,527 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 98 transitions, 706 flow [2023-11-29 05:09:33,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-29 05:09:33,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-29 05:09:33,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 73 transitions. [2023-11-29 05:09:33,528 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.553030303030303 [2023-11-29 05:09:33,529 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 73 transitions. [2023-11-29 05:09:33,529 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 73 transitions. [2023-11-29 05:09:33,529 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 05:09:33,529 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 73 transitions. [2023-11-29 05:09:33,529 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 18.25) internal successors, (73), 4 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:09:33,530 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 33.0) internal successors, (165), 5 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:09:33,530 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 33.0) internal successors, (165), 5 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:09:33,530 INFO L175 Difference]: Start difference. First operand has 56 places, 55 transitions, 295 flow. Second operand 4 states and 73 transitions. [2023-11-29 05:09:33,530 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 98 transitions, 706 flow [2023-11-29 05:09:33,535 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 98 transitions, 657 flow, removed 2 selfloop flow, removed 3 redundant places. [2023-11-29 05:09:33,537 INFO L231 Difference]: Finished difference. Result has 58 places, 58 transitions, 318 flow [2023-11-29 05:09:33,537 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=278, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=318, PETRI_PLACES=58, PETRI_TRANSITIONS=58} [2023-11-29 05:09:33,538 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 25 predicate places. [2023-11-29 05:09:33,538 INFO L495 AbstractCegarLoop]: Abstraction has has 58 places, 58 transitions, 318 flow [2023-11-29 05:09:33,538 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 10.5) internal successors, (42), 4 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:09:33,539 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 05:09:33,539 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:09:33,544 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91e2605f-eff2-4533-a1b2-a84cc5102bbd/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (8)] Ended with exit code 0 [2023-11-29 05:09:33,740 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91e2605f-eff2-4533-a1b2-a84cc5102bbd/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-29 05:09:33,740 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-29 05:09:33,740 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:09:33,741 INFO L85 PathProgramCache]: Analyzing trace with hash 243720560, now seen corresponding path program 2 times [2023-11-29 05:09:33,741 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-29 05:09:33,741 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [835490154] [2023-11-29 05:09:33,741 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 05:09:33,741 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-29 05:09:33,741 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91e2605f-eff2-4533-a1b2-a84cc5102bbd/bin/uautomizer-verify-BQ2R08f2Ya/mathsat [2023-11-29 05:09:33,742 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91e2605f-eff2-4533-a1b2-a84cc5102bbd/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-29 05:09:33,743 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91e2605f-eff2-4533-a1b2-a84cc5102bbd/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2023-11-29 05:09:34,066 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-29 05:09:34,066 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 05:09:34,077 INFO L262 TraceCheckSpWp]: Trace formula consists of 301 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-29 05:09:34,079 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:09:34,100 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-11-29 05:09:34,100 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 05:09:34,100 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-29 05:09:34,100 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [835490154] [2023-11-29 05:09:34,101 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [835490154] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 05:09:34,101 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 05:09:34,101 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-29 05:09:34,101 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [175733967] [2023-11-29 05:09:34,101 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 05:09:34,102 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-29 05:09:34,102 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-29 05:09:34,102 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-29 05:09:34,103 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-29 05:09:34,103 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 33 [2023-11-29 05:09:34,103 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 58 transitions, 318 flow. Second operand has 4 states, 4 states have (on average 10.5) internal successors, (42), 4 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:09:34,103 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 05:09:34,103 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 33 [2023-11-29 05:09:34,103 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 05:09:34,571 INFO L124 PetriNetUnfolderBase]: 694/1043 cut-off events. [2023-11-29 05:09:34,571 INFO L125 PetriNetUnfolderBase]: For 1544/1544 co-relation queries the response was YES. [2023-11-29 05:09:34,573 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3708 conditions, 1043 events. 694/1043 cut-off events. For 1544/1544 co-relation queries the response was YES. Maximal size of possible extension queue 50. Compared 3818 event pairs, 83 based on Foata normal form. 40/907 useless extension candidates. Maximal degree in co-relation 3607. Up to 733 conditions per place. [2023-11-29 05:09:34,577 INFO L140 encePairwiseOnDemand]: 27/33 looper letters, 77 selfloop transitions, 8 changer transitions 1/87 dead transitions. [2023-11-29 05:09:34,578 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 87 transitions, 620 flow [2023-11-29 05:09:34,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-29 05:09:34,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-29 05:09:34,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 65 transitions. [2023-11-29 05:09:34,579 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49242424242424243 [2023-11-29 05:09:34,579 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 65 transitions. [2023-11-29 05:09:34,579 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 65 transitions. [2023-11-29 05:09:34,579 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 05:09:34,579 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 65 transitions. [2023-11-29 05:09:34,579 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 16.25) internal successors, (65), 4 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:09:34,580 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 33.0) internal successors, (165), 5 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:09:34,580 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 33.0) internal successors, (165), 5 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:09:34,580 INFO L175 Difference]: Start difference. First operand has 58 places, 58 transitions, 318 flow. Second operand 4 states and 65 transitions. [2023-11-29 05:09:34,581 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 87 transitions, 620 flow [2023-11-29 05:09:34,585 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 87 transitions, 611 flow, removed 2 selfloop flow, removed 1 redundant places. [2023-11-29 05:09:34,586 INFO L231 Difference]: Finished difference. Result has 62 places, 59 transitions, 343 flow [2023-11-29 05:09:34,586 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=311, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=343, PETRI_PLACES=62, PETRI_TRANSITIONS=59} [2023-11-29 05:09:34,587 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 29 predicate places. [2023-11-29 05:09:34,587 INFO L495 AbstractCegarLoop]: Abstraction has has 62 places, 59 transitions, 343 flow [2023-11-29 05:09:34,588 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 10.5) internal successors, (42), 4 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:09:34,588 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 05:09:34,588 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:09:34,593 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91e2605f-eff2-4533-a1b2-a84cc5102bbd/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (9)] Ended with exit code 0 [2023-11-29 05:09:34,791 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91e2605f-eff2-4533-a1b2-a84cc5102bbd/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-29 05:09:34,791 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-29 05:09:34,792 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:09:34,792 INFO L85 PathProgramCache]: Analyzing trace with hash -116941761, now seen corresponding path program 1 times [2023-11-29 05:09:34,792 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-29 05:09:34,792 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [83327933] [2023-11-29 05:09:34,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:09:34,792 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-29 05:09:34,792 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91e2605f-eff2-4533-a1b2-a84cc5102bbd/bin/uautomizer-verify-BQ2R08f2Ya/mathsat [2023-11-29 05:09:34,793 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91e2605f-eff2-4533-a1b2-a84cc5102bbd/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-29 05:09:34,794 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91e2605f-eff2-4533-a1b2-a84cc5102bbd/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2023-11-29 05:09:35,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:09:35,096 INFO L262 TraceCheckSpWp]: Trace formula consists of 309 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-29 05:09:35,097 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:09:35,123 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2023-11-29 05:09:35,124 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 05:09:35,152 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2023-11-29 05:09:35,153 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-29 05:09:35,153 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [83327933] [2023-11-29 05:09:35,153 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [83327933] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-29 05:09:35,153 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-29 05:09:35,153 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 7 [2023-11-29 05:09:35,153 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [867475691] [2023-11-29 05:09:35,153 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 05:09:35,154 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-29 05:09:35,154 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-29 05:09:35,154 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-29 05:09:35,155 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2023-11-29 05:09:35,155 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 33 [2023-11-29 05:09:35,155 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 59 transitions, 343 flow. Second operand has 5 states, 5 states have (on average 9.4) internal successors, (47), 5 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:09:35,155 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 05:09:35,155 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 33 [2023-11-29 05:09:35,155 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 05:09:35,615 INFO L124 PetriNetUnfolderBase]: 728/1081 cut-off events. [2023-11-29 05:09:35,615 INFO L125 PetriNetUnfolderBase]: For 2126/2126 co-relation queries the response was YES. [2023-11-29 05:09:35,618 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3957 conditions, 1081 events. 728/1081 cut-off events. For 2126/2126 co-relation queries the response was YES. Maximal size of possible extension queue 54. Compared 3668 event pairs, 111 based on Foata normal form. 24/917 useless extension candidates. Maximal degree in co-relation 3853. Up to 503 conditions per place. [2023-11-29 05:09:35,624 INFO L140 encePairwiseOnDemand]: 26/33 looper letters, 90 selfloop transitions, 10 changer transitions 1/102 dead transitions. [2023-11-29 05:09:35,625 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 102 transitions, 769 flow [2023-11-29 05:09:35,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-29 05:09:35,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-29 05:09:35,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 81 transitions. [2023-11-29 05:09:35,625 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4909090909090909 [2023-11-29 05:09:35,626 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 81 transitions. [2023-11-29 05:09:35,626 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 81 transitions. [2023-11-29 05:09:35,626 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 05:09:35,626 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 81 transitions. [2023-11-29 05:09:35,626 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 16.2) internal successors, (81), 5 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:09:35,626 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 33.0) internal successors, (198), 6 states have internal predecessors, (198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:09:35,627 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 33.0) internal successors, (198), 6 states have internal predecessors, (198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:09:35,627 INFO L175 Difference]: Start difference. First operand has 62 places, 59 transitions, 343 flow. Second operand 5 states and 81 transitions. [2023-11-29 05:09:35,627 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 102 transitions, 769 flow [2023-11-29 05:09:35,630 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 102 transitions, 730 flow, removed 3 selfloop flow, removed 4 redundant places. [2023-11-29 05:09:35,632 INFO L231 Difference]: Finished difference. Result has 63 places, 62 transitions, 386 flow [2023-11-29 05:09:35,632 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=325, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=386, PETRI_PLACES=63, PETRI_TRANSITIONS=62} [2023-11-29 05:09:35,632 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 30 predicate places. [2023-11-29 05:09:35,632 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 62 transitions, 386 flow [2023-11-29 05:09:35,632 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.4) internal successors, (47), 5 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:09:35,633 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 05:09:35,633 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:09:35,639 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91e2605f-eff2-4533-a1b2-a84cc5102bbd/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (10)] Ended with exit code 0 [2023-11-29 05:09:35,833 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91e2605f-eff2-4533-a1b2-a84cc5102bbd/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-29 05:09:35,833 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-29 05:09:35,834 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:09:35,834 INFO L85 PathProgramCache]: Analyzing trace with hash -1288491201, now seen corresponding path program 2 times [2023-11-29 05:09:35,834 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-29 05:09:35,834 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1069960849] [2023-11-29 05:09:35,834 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 05:09:35,835 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-29 05:09:35,835 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91e2605f-eff2-4533-a1b2-a84cc5102bbd/bin/uautomizer-verify-BQ2R08f2Ya/mathsat [2023-11-29 05:09:35,835 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91e2605f-eff2-4533-a1b2-a84cc5102bbd/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-29 05:09:35,836 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91e2605f-eff2-4533-a1b2-a84cc5102bbd/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2023-11-29 05:09:36,108 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-29 05:09:36,108 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 05:09:36,120 INFO L262 TraceCheckSpWp]: Trace formula consists of 309 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-29 05:09:36,125 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:09:36,163 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2023-11-29 05:09:36,163 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 05:09:36,163 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-29 05:09:36,164 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1069960849] [2023-11-29 05:09:36,164 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1069960849] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 05:09:36,164 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 05:09:36,164 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-29 05:09:36,164 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1841526629] [2023-11-29 05:09:36,164 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 05:09:36,164 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-29 05:09:36,165 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-29 05:09:36,165 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-29 05:09:36,165 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-29 05:09:36,165 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 33 [2023-11-29 05:09:36,165 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 62 transitions, 386 flow. Second operand has 5 states, 5 states have (on average 9.4) internal successors, (47), 5 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:09:36,165 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 05:09:36,165 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 33 [2023-11-29 05:09:36,165 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 05:09:36,705 INFO L124 PetriNetUnfolderBase]: 774/1153 cut-off events. [2023-11-29 05:09:36,705 INFO L125 PetriNetUnfolderBase]: For 2330/2330 co-relation queries the response was YES. [2023-11-29 05:09:36,709 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4393 conditions, 1153 events. 774/1153 cut-off events. For 2330/2330 co-relation queries the response was YES. Maximal size of possible extension queue 60. Compared 4055 event pairs, 217 based on Foata normal form. 14/975 useless extension candidates. Maximal degree in co-relation 4288. Up to 652 conditions per place. [2023-11-29 05:09:36,716 INFO L140 encePairwiseOnDemand]: 28/33 looper letters, 75 selfloop transitions, 12 changer transitions 11/99 dead transitions. [2023-11-29 05:09:36,716 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 99 transitions, 734 flow [2023-11-29 05:09:36,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-29 05:09:36,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-29 05:09:36,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 83 transitions. [2023-11-29 05:09:36,718 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.503030303030303 [2023-11-29 05:09:36,718 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 83 transitions. [2023-11-29 05:09:36,718 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 83 transitions. [2023-11-29 05:09:36,718 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 05:09:36,718 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 83 transitions. [2023-11-29 05:09:36,719 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 16.6) internal successors, (83), 5 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:09:36,719 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 33.0) internal successors, (198), 6 states have internal predecessors, (198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:09:36,719 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 33.0) internal successors, (198), 6 states have internal predecessors, (198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:09:36,720 INFO L175 Difference]: Start difference. First operand has 63 places, 62 transitions, 386 flow. Second operand 5 states and 83 transitions. [2023-11-29 05:09:36,720 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 99 transitions, 734 flow [2023-11-29 05:09:36,726 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 99 transitions, 724 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-29 05:09:36,728 INFO L231 Difference]: Finished difference. Result has 67 places, 64 transitions, 420 flow [2023-11-29 05:09:36,728 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=377, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=420, PETRI_PLACES=67, PETRI_TRANSITIONS=64} [2023-11-29 05:09:36,729 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 34 predicate places. [2023-11-29 05:09:36,729 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 64 transitions, 420 flow [2023-11-29 05:09:36,729 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.4) internal successors, (47), 5 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:09:36,729 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 05:09:36,729 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:09:36,735 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91e2605f-eff2-4533-a1b2-a84cc5102bbd/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (11)] Ended with exit code 0 [2023-11-29 05:09:36,930 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91e2605f-eff2-4533-a1b2-a84cc5102bbd/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-29 05:09:36,930 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-29 05:09:36,930 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:09:36,930 INFO L85 PathProgramCache]: Analyzing trace with hash -1913814531, now seen corresponding path program 3 times [2023-11-29 05:09:36,930 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-29 05:09:36,930 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [439803435] [2023-11-29 05:09:36,931 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-29 05:09:36,931 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-29 05:09:36,931 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91e2605f-eff2-4533-a1b2-a84cc5102bbd/bin/uautomizer-verify-BQ2R08f2Ya/mathsat [2023-11-29 05:09:36,931 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91e2605f-eff2-4533-a1b2-a84cc5102bbd/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-29 05:09:36,932 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91e2605f-eff2-4533-a1b2-a84cc5102bbd/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2023-11-29 05:09:37,166 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-11-29 05:09:37,167 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 05:09:37,175 INFO L262 TraceCheckSpWp]: Trace formula consists of 237 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-29 05:09:37,176 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:09:37,206 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2023-11-29 05:09:37,206 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 05:09:37,206 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-29 05:09:37,206 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [439803435] [2023-11-29 05:09:37,206 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [439803435] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 05:09:37,206 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 05:09:37,206 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-29 05:09:37,206 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2098677421] [2023-11-29 05:09:37,207 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 05:09:37,207 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-29 05:09:37,207 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-29 05:09:37,207 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-29 05:09:37,207 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-29 05:09:37,208 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 33 [2023-11-29 05:09:37,208 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 64 transitions, 420 flow. Second operand has 5 states, 5 states have (on average 9.4) internal successors, (47), 5 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:09:37,208 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 05:09:37,208 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 33 [2023-11-29 05:09:37,208 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 05:09:37,826 INFO L124 PetriNetUnfolderBase]: 815/1204 cut-off events. [2023-11-29 05:09:37,826 INFO L125 PetriNetUnfolderBase]: For 2656/2656 co-relation queries the response was YES. [2023-11-29 05:09:37,829 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4812 conditions, 1204 events. 815/1204 cut-off events. For 2656/2656 co-relation queries the response was YES. Maximal size of possible extension queue 63. Compared 4267 event pairs, 217 based on Foata normal form. 24/1022 useless extension candidates. Maximal degree in co-relation 4719. Up to 676 conditions per place. [2023-11-29 05:09:37,834 INFO L140 encePairwiseOnDemand]: 28/33 looper letters, 85 selfloop transitions, 13 changer transitions 0/99 dead transitions. [2023-11-29 05:09:37,834 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 99 transitions, 769 flow [2023-11-29 05:09:37,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-29 05:09:37,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-29 05:09:37,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 83 transitions. [2023-11-29 05:09:37,835 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.503030303030303 [2023-11-29 05:09:37,835 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 83 transitions. [2023-11-29 05:09:37,836 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 83 transitions. [2023-11-29 05:09:37,836 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 05:09:37,836 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 83 transitions. [2023-11-29 05:09:37,836 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 16.6) internal successors, (83), 5 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:09:37,837 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 33.0) internal successors, (198), 6 states have internal predecessors, (198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:09:37,837 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 33.0) internal successors, (198), 6 states have internal predecessors, (198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:09:37,837 INFO L175 Difference]: Start difference. First operand has 67 places, 64 transitions, 420 flow. Second operand 5 states and 83 transitions. [2023-11-29 05:09:37,837 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 99 transitions, 769 flow [2023-11-29 05:09:37,842 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 99 transitions, 756 flow, removed 1 selfloop flow, removed 2 redundant places. [2023-11-29 05:09:37,844 INFO L231 Difference]: Finished difference. Result has 69 places, 65 transitions, 444 flow [2023-11-29 05:09:37,844 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=408, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=64, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=444, PETRI_PLACES=69, PETRI_TRANSITIONS=65} [2023-11-29 05:09:37,844 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 36 predicate places. [2023-11-29 05:09:37,844 INFO L495 AbstractCegarLoop]: Abstraction has has 69 places, 65 transitions, 444 flow [2023-11-29 05:09:37,844 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.4) internal successors, (47), 5 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:09:37,844 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 05:09:37,845 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:09:37,849 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91e2605f-eff2-4533-a1b2-a84cc5102bbd/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (12)] Ended with exit code 0 [2023-11-29 05:09:38,045 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91e2605f-eff2-4533-a1b2-a84cc5102bbd/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-29 05:09:38,045 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-29 05:09:38,045 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:09:38,045 INFO L85 PathProgramCache]: Analyzing trace with hash 361770547, now seen corresponding path program 4 times [2023-11-29 05:09:38,046 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-29 05:09:38,046 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1945930999] [2023-11-29 05:09:38,046 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-29 05:09:38,046 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-29 05:09:38,046 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91e2605f-eff2-4533-a1b2-a84cc5102bbd/bin/uautomizer-verify-BQ2R08f2Ya/mathsat [2023-11-29 05:09:38,047 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91e2605f-eff2-4533-a1b2-a84cc5102bbd/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-29 05:09:38,048 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91e2605f-eff2-4533-a1b2-a84cc5102bbd/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2023-11-29 05:09:38,305 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-29 05:09:38,305 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 05:09:38,319 INFO L262 TraceCheckSpWp]: Trace formula consists of 309 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-29 05:09:38,320 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:09:38,347 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2023-11-29 05:09:38,347 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 05:09:38,347 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-29 05:09:38,348 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1945930999] [2023-11-29 05:09:38,348 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1945930999] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 05:09:38,348 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 05:09:38,348 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-29 05:09:38,348 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1627208478] [2023-11-29 05:09:38,348 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 05:09:38,348 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-29 05:09:38,349 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-29 05:09:38,349 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-29 05:09:38,349 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-29 05:09:38,349 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 33 [2023-11-29 05:09:38,350 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 65 transitions, 444 flow. Second operand has 5 states, 5 states have (on average 9.4) internal successors, (47), 5 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:09:38,350 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 05:09:38,350 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 33 [2023-11-29 05:09:38,350 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 05:09:38,890 INFO L124 PetriNetUnfolderBase]: 791/1180 cut-off events. [2023-11-29 05:09:38,890 INFO L125 PetriNetUnfolderBase]: For 3074/3074 co-relation queries the response was YES. [2023-11-29 05:09:38,894 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4796 conditions, 1180 events. 791/1180 cut-off events. For 3074/3074 co-relation queries the response was YES. Maximal size of possible extension queue 63. Compared 4221 event pairs, 261 based on Foata normal form. 24/998 useless extension candidates. Maximal degree in co-relation 4689. Up to 806 conditions per place. [2023-11-29 05:09:38,899 INFO L140 encePairwiseOnDemand]: 28/33 looper letters, 92 selfloop transitions, 10 changer transitions 1/104 dead transitions. [2023-11-29 05:09:38,899 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 104 transitions, 817 flow [2023-11-29 05:09:38,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-29 05:09:38,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-29 05:09:38,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 85 transitions. [2023-11-29 05:09:38,900 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5151515151515151 [2023-11-29 05:09:38,900 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 85 transitions. [2023-11-29 05:09:38,900 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 85 transitions. [2023-11-29 05:09:38,900 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 05:09:38,900 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 85 transitions. [2023-11-29 05:09:38,901 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 17.0) internal successors, (85), 5 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:09:38,901 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 33.0) internal successors, (198), 6 states have internal predecessors, (198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:09:38,909 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 33.0) internal successors, (198), 6 states have internal predecessors, (198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:09:38,909 INFO L175 Difference]: Start difference. First operand has 69 places, 65 transitions, 444 flow. Second operand 5 states and 85 transitions. [2023-11-29 05:09:38,909 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 104 transitions, 817 flow [2023-11-29 05:09:38,917 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 104 transitions, 787 flow, removed 1 selfloop flow, removed 3 redundant places. [2023-11-29 05:09:38,919 INFO L231 Difference]: Finished difference. Result has 71 places, 65 transitions, 438 flow [2023-11-29 05:09:38,919 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=416, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=65, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=438, PETRI_PLACES=71, PETRI_TRANSITIONS=65} [2023-11-29 05:09:38,919 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 38 predicate places. [2023-11-29 05:09:38,919 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 65 transitions, 438 flow [2023-11-29 05:09:38,920 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.4) internal successors, (47), 5 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:09:38,920 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 05:09:38,920 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:09:38,925 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91e2605f-eff2-4533-a1b2-a84cc5102bbd/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (13)] Ended with exit code 0 [2023-11-29 05:09:39,120 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91e2605f-eff2-4533-a1b2-a84cc5102bbd/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-29 05:09:39,120 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-29 05:09:39,121 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:09:39,121 INFO L85 PathProgramCache]: Analyzing trace with hash -1887788291, now seen corresponding path program 5 times [2023-11-29 05:09:39,121 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-29 05:09:39,121 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [193619435] [2023-11-29 05:09:39,121 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-29 05:09:39,121 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-29 05:09:39,122 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91e2605f-eff2-4533-a1b2-a84cc5102bbd/bin/uautomizer-verify-BQ2R08f2Ya/mathsat [2023-11-29 05:09:39,122 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91e2605f-eff2-4533-a1b2-a84cc5102bbd/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-29 05:09:39,123 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91e2605f-eff2-4533-a1b2-a84cc5102bbd/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2023-11-29 05:09:39,552 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2023-11-29 05:09:39,552 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 05:09:39,566 INFO L262 TraceCheckSpWp]: Trace formula consists of 309 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-29 05:09:39,567 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:09:39,587 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2023-11-29 05:09:39,587 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 05:09:39,587 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-29 05:09:39,587 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [193619435] [2023-11-29 05:09:39,587 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [193619435] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 05:09:39,587 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 05:09:39,587 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-29 05:09:39,587 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1263573661] [2023-11-29 05:09:39,587 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 05:09:39,588 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-29 05:09:39,588 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-29 05:09:39,588 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-29 05:09:39,588 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-29 05:09:39,588 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 33 [2023-11-29 05:09:39,589 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 65 transitions, 438 flow. Second operand has 5 states, 5 states have (on average 9.4) internal successors, (47), 5 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:09:39,589 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 05:09:39,589 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 33 [2023-11-29 05:09:39,589 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 05:09:40,051 INFO L124 PetriNetUnfolderBase]: 702/1036 cut-off events. [2023-11-29 05:09:40,051 INFO L125 PetriNetUnfolderBase]: For 2485/2485 co-relation queries the response was YES. [2023-11-29 05:09:40,053 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4227 conditions, 1036 events. 702/1036 cut-off events. For 2485/2485 co-relation queries the response was YES. Maximal size of possible extension queue 58. Compared 3477 event pairs, 254 based on Foata normal form. 14/866 useless extension candidates. Maximal degree in co-relation 4119. Up to 815 conditions per place. [2023-11-29 05:09:40,058 INFO L140 encePairwiseOnDemand]: 28/33 looper letters, 76 selfloop transitions, 8 changer transitions 11/96 dead transitions. [2023-11-29 05:09:40,058 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 96 transitions, 753 flow [2023-11-29 05:09:40,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-29 05:09:40,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-29 05:09:40,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 78 transitions. [2023-11-29 05:09:40,059 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4727272727272727 [2023-11-29 05:09:40,059 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 78 transitions. [2023-11-29 05:09:40,059 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 78 transitions. [2023-11-29 05:09:40,059 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 05:09:40,059 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 78 transitions. [2023-11-29 05:09:40,060 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 15.6) internal successors, (78), 5 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) [2023-11-29 05:09:40,060 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 33.0) internal successors, (198), 6 states have internal predecessors, (198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:09:40,060 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 33.0) internal successors, (198), 6 states have internal predecessors, (198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:09:40,060 INFO L175 Difference]: Start difference. First operand has 71 places, 65 transitions, 438 flow. Second operand 5 states and 78 transitions. [2023-11-29 05:09:40,060 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 96 transitions, 753 flow [2023-11-29 05:09:40,066 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 96 transitions, 737 flow, removed 1 selfloop flow, removed 3 redundant places. [2023-11-29 05:09:40,067 INFO L231 Difference]: Finished difference. Result has 71 places, 63 transitions, 422 flow [2023-11-29 05:09:40,067 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=414, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=64, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=422, PETRI_PLACES=71, PETRI_TRANSITIONS=63} [2023-11-29 05:09:40,068 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 38 predicate places. [2023-11-29 05:09:40,068 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 63 transitions, 422 flow [2023-11-29 05:09:40,068 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.4) internal successors, (47), 5 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:09:40,068 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 05:09:40,068 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:09:40,075 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91e2605f-eff2-4533-a1b2-a84cc5102bbd/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (14)] Ended with exit code 0 [2023-11-29 05:09:40,268 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91e2605f-eff2-4533-a1b2-a84cc5102bbd/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-29 05:09:40,269 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-29 05:09:40,269 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:09:40,269 INFO L85 PathProgramCache]: Analyzing trace with hash 804046695, now seen corresponding path program 1 times [2023-11-29 05:09:40,269 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-29 05:09:40,269 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1911125846] [2023-11-29 05:09:40,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:09:40,269 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-29 05:09:40,270 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91e2605f-eff2-4533-a1b2-a84cc5102bbd/bin/uautomizer-verify-BQ2R08f2Ya/mathsat [2023-11-29 05:09:40,270 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91e2605f-eff2-4533-a1b2-a84cc5102bbd/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-29 05:09:40,271 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91e2605f-eff2-4533-a1b2-a84cc5102bbd/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (15)] Waiting until timeout for monitored process