./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/weaver/popl20-queue-add-2.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 38b53e6a 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_ff2a69db-f292-4098-8ca3-ff948148af61/bin/uautomizer-ZsLfNo2U6R/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff2a69db-f292-4098-8ca3-ff948148af61/bin/uautomizer-ZsLfNo2U6R/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff2a69db-f292-4098-8ca3-ff948148af61/bin/uautomizer-ZsLfNo2U6R/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff2a69db-f292-4098-8ca3-ff948148af61/bin/uautomizer-ZsLfNo2U6R/config/AutomizerReach.xml -i ../../sv-benchmarks/c/weaver/popl20-queue-add-2.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff2a69db-f292-4098-8ca3-ff948148af61/bin/uautomizer-ZsLfNo2U6R/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff2a69db-f292-4098-8ca3-ff948148af61/bin/uautomizer-ZsLfNo2U6R --witnessprinter.witness.filename witness.graphml --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 89f85a9c071b9d85a8a89a1542b8738a051beeaf8ef3f8b389c5a92dd50b70df --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-38b53e6 [2022-11-25 17:19:48,654 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-25 17:19:48,656 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-25 17:19:48,674 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-25 17:19:48,674 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-25 17:19:48,675 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-25 17:19:48,677 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-25 17:19:48,679 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-25 17:19:48,681 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-25 17:19:48,682 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-25 17:19:48,683 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-25 17:19:48,684 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-25 17:19:48,685 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-25 17:19:48,686 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-25 17:19:48,687 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-25 17:19:48,688 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-25 17:19:48,689 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-25 17:19:48,690 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-25 17:19:48,692 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-25 17:19:48,694 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-25 17:19:48,695 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-25 17:19:48,697 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-25 17:19:48,698 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-25 17:19:48,699 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-25 17:19:48,702 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-25 17:19:48,702 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-25 17:19:48,703 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-25 17:19:48,704 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-25 17:19:48,704 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-25 17:19:48,705 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-25 17:19:48,705 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-25 17:19:48,706 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-25 17:19:48,707 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-25 17:19:48,708 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-25 17:19:48,709 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-25 17:19:48,709 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-25 17:19:48,710 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-25 17:19:48,710 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-25 17:19:48,711 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-25 17:19:48,720 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-25 17:19:48,722 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-25 17:19:48,723 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff2a69db-f292-4098-8ca3-ff948148af61/bin/uautomizer-ZsLfNo2U6R/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-11-25 17:19:48,758 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-25 17:19:48,762 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-25 17:19:48,763 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-25 17:19:48,763 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-25 17:19:48,764 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-25 17:19:48,765 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-25 17:19:48,765 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-25 17:19:48,766 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-25 17:19:48,766 INFO L138 SettingsManager]: * Use SBE=true [2022-11-25 17:19:48,766 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-25 17:19:48,767 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-25 17:19:48,767 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-25 17:19:48,768 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-25 17:19:48,768 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-25 17:19:48,768 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-25 17:19:48,768 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-25 17:19:48,768 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-25 17:19:48,769 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-25 17:19:48,769 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-25 17:19:48,769 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-25 17:19:48,769 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-25 17:19:48,770 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-25 17:19:48,770 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-25 17:19:48,770 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-25 17:19:48,770 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-25 17:19:48,770 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-25 17:19:48,771 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-25 17:19:48,771 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-25 17:19:48,772 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-25 17:19:48,772 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-25 17:19:48,772 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-25 17:19:48,772 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-25 17:19:48,773 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2022-11-25 17:19:48,773 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-11-25 17:19:48,774 INFO L138 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_ff2a69db-f292-4098-8ca3-ff948148af61/bin/uautomizer-ZsLfNo2U6R/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff2a69db-f292-4098-8ca3-ff948148af61/bin/uautomizer-ZsLfNo2U6R Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 89f85a9c071b9d85a8a89a1542b8738a051beeaf8ef3f8b389c5a92dd50b70df [2022-11-25 17:19:49,057 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-25 17:19:49,078 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-25 17:19:49,081 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-25 17:19:49,082 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-25 17:19:49,083 INFO L275 PluginConnector]: CDTParser initialized [2022-11-25 17:19:49,084 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff2a69db-f292-4098-8ca3-ff948148af61/bin/uautomizer-ZsLfNo2U6R/../../sv-benchmarks/c/weaver/popl20-queue-add-2.wvr.c [2022-11-25 17:19:52,145 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-25 17:19:52,401 INFO L351 CDTParser]: Found 1 translation units. [2022-11-25 17:19:52,401 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff2a69db-f292-4098-8ca3-ff948148af61/sv-benchmarks/c/weaver/popl20-queue-add-2.wvr.c [2022-11-25 17:19:52,411 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff2a69db-f292-4098-8ca3-ff948148af61/bin/uautomizer-ZsLfNo2U6R/data/0f98ab4cc/2546c55c9330492c978a345e6aa643c9/FLAG593d2e228 [2022-11-25 17:19:52,427 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff2a69db-f292-4098-8ca3-ff948148af61/bin/uautomizer-ZsLfNo2U6R/data/0f98ab4cc/2546c55c9330492c978a345e6aa643c9 [2022-11-25 17:19:52,430 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-25 17:19:52,431 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-25 17:19:52,433 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-25 17:19:52,433 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-25 17:19:52,438 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-25 17:19:52,439 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 05:19:52" (1/1) ... [2022-11-25 17:19:52,440 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@40cb0be8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:19:52, skipping insertion in model container [2022-11-25 17:19:52,440 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 05:19:52" (1/1) ... [2022-11-25 17:19:52,448 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-25 17:19:52,479 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-25 17:19:52,739 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 17:19:52,745 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 17:19:52,747 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 17:19:52,749 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 17:19:52,752 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 17:19:52,753 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 17:19:52,771 WARN L237 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_ff2a69db-f292-4098-8ca3-ff948148af61/sv-benchmarks/c/weaver/popl20-queue-add-2.wvr.c[2696,2709] [2022-11-25 17:19:52,795 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-25 17:19:52,806 INFO L203 MainTranslator]: Completed pre-run [2022-11-25 17:19:52,827 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 17:19:52,831 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 17:19:52,832 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 17:19:52,834 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 17:19:52,839 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 17:19:52,841 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 17:19:52,854 WARN L237 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_ff2a69db-f292-4098-8ca3-ff948148af61/sv-benchmarks/c/weaver/popl20-queue-add-2.wvr.c[2696,2709] [2022-11-25 17:19:52,870 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-25 17:19:52,885 INFO L208 MainTranslator]: Completed translation [2022-11-25 17:19:52,886 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:19:52 WrapperNode [2022-11-25 17:19:52,886 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-25 17:19:52,887 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-25 17:19:52,887 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-25 17:19:52,888 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-25 17:19:52,895 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:19:52" (1/1) ... [2022-11-25 17:19:52,915 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:19:52" (1/1) ... [2022-11-25 17:19:52,952 INFO L138 Inliner]: procedures = 24, calls = 39, calls flagged for inlining = 12, calls inlined = 12, statements flattened = 154 [2022-11-25 17:19:52,952 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-25 17:19:52,954 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-25 17:19:52,954 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-25 17:19:52,954 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-25 17:19:52,964 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:19:52" (1/1) ... [2022-11-25 17:19:52,966 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:19:52" (1/1) ... [2022-11-25 17:19:52,982 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:19:52" (1/1) ... [2022-11-25 17:19:52,982 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:19:52" (1/1) ... [2022-11-25 17:19:52,988 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:19:52" (1/1) ... [2022-11-25 17:19:52,991 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:19:52" (1/1) ... [2022-11-25 17:19:52,993 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:19:52" (1/1) ... [2022-11-25 17:19:52,994 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:19:52" (1/1) ... [2022-11-25 17:19:53,009 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-25 17:19:53,010 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-25 17:19:53,010 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-25 17:19:53,010 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-25 17:19:53,011 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:19:52" (1/1) ... [2022-11-25 17:19:53,017 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-25 17:19:53,029 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff2a69db-f292-4098-8ca3-ff948148af61/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:19:53,043 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff2a69db-f292-4098-8ca3-ff948148af61/bin/uautomizer-ZsLfNo2U6R/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-25 17:19:53,056 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff2a69db-f292-4098-8ca3-ff948148af61/bin/uautomizer-ZsLfNo2U6R/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-25 17:19:53,083 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-25 17:19:53,083 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-11-25 17:19:53,083 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-11-25 17:19:53,083 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-11-25 17:19:53,083 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-11-25 17:19:53,083 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-25 17:19:53,084 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-25 17:19:53,084 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-25 17:19:53,084 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2022-11-25 17:19:53,084 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2022-11-25 17:19:53,084 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-25 17:19:53,084 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-25 17:19:53,084 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-25 17:19:53,085 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-25 17:19:53,085 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-25 17:19:53,086 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-11-25 17:19:53,191 INFO L235 CfgBuilder]: Building ICFG [2022-11-25 17:19:53,192 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-25 17:19:53,517 INFO L276 CfgBuilder]: Performing block encoding [2022-11-25 17:19:53,660 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-25 17:19:53,660 INFO L300 CfgBuilder]: Removed 3 assume(true) statements. [2022-11-25 17:19:53,663 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 05:19:53 BoogieIcfgContainer [2022-11-25 17:19:53,663 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-25 17:19:53,666 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-25 17:19:53,666 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-25 17:19:53,669 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-25 17:19:53,670 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.11 05:19:52" (1/3) ... [2022-11-25 17:19:53,670 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1f201835 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 05:19:53, skipping insertion in model container [2022-11-25 17:19:53,671 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:19:52" (2/3) ... [2022-11-25 17:19:53,671 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1f201835 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 05:19:53, skipping insertion in model container [2022-11-25 17:19:53,671 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 05:19:53" (3/3) ... [2022-11-25 17:19:53,673 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-queue-add-2.wvr.c [2022-11-25 17:19:53,682 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-11-25 17:19:53,692 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-25 17:19:53,692 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-25 17:19:53,692 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-11-25 17:19:53,756 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2022-11-25 17:19:53,797 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 132 places, 136 transitions, 288 flow [2022-11-25 17:19:53,860 INFO L130 PetriNetUnfolder]: 11/134 cut-off events. [2022-11-25 17:19:53,861 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-11-25 17:19:53,868 INFO L83 FinitePrefix]: Finished finitePrefix Result has 143 conditions, 134 events. 11/134 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 68 event pairs, 0 based on Foata normal form. 0/122 useless extension candidates. Maximal degree in co-relation 99. Up to 3 conditions per place. [2022-11-25 17:19:53,869 INFO L82 GeneralOperation]: Start removeDead. Operand has 132 places, 136 transitions, 288 flow [2022-11-25 17:19:53,873 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 121 places, 125 transitions, 262 flow [2022-11-25 17:19:53,877 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-11-25 17:19:53,903 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 121 places, 125 transitions, 262 flow [2022-11-25 17:19:53,906 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 121 places, 125 transitions, 262 flow [2022-11-25 17:19:53,919 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 121 places, 125 transitions, 262 flow [2022-11-25 17:19:53,963 INFO L130 PetriNetUnfolder]: 11/125 cut-off events. [2022-11-25 17:19:53,963 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-11-25 17:19:53,964 INFO L83 FinitePrefix]: Finished finitePrefix Result has 134 conditions, 125 events. 11/125 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 67 event pairs, 0 based on Foata normal form. 0/114 useless extension candidates. Maximal degree in co-relation 99. Up to 3 conditions per place. [2022-11-25 17:19:53,966 INFO L119 LiptonReduction]: Number of co-enabled transitions 538 [2022-11-25 17:19:59,842 INFO L134 LiptonReduction]: Checked pairs total: 675 [2022-11-25 17:19:59,842 INFO L136 LiptonReduction]: Total number of compositions: 135 [2022-11-25 17:19:59,860 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-25 17:19:59,867 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=LoopsAndPotentialCycles, 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;@3b8fa9ed, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-25 17:19:59,867 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2022-11-25 17:19:59,873 INFO L130 PetriNetUnfolder]: 3/16 cut-off events. [2022-11-25 17:19:59,874 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-11-25 17:19:59,874 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:19:59,875 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:19:59,875 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-25 17:19:59,880 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:19:59,881 INFO L85 PathProgramCache]: Analyzing trace with hash 191838715, now seen corresponding path program 1 times [2022-11-25 17:19:59,890 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:19:59,891 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2051869986] [2022-11-25 17:19:59,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:19:59,892 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:20:00,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:20:00,395 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:20:00,396 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:20:00,396 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2051869986] [2022-11-25 17:20:00,397 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2051869986] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:20:00,397 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 17:20:00,397 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-25 17:20:00,399 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [996011939] [2022-11-25 17:20:00,399 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:20:00,408 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-25 17:20:00,408 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:20:00,434 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-25 17:20:00,438 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-25 17:20:00,489 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 114 out of 271 [2022-11-25 17:20:00,496 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 21 places, 17 transitions, 46 flow. Second operand has 4 states, 4 states have (on average 117.0) internal successors, (468), 4 states have internal predecessors, (468), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:20:00,496 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:20:00,496 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 114 of 271 [2022-11-25 17:20:00,497 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:20:00,628 INFO L130 PetriNetUnfolder]: 45/87 cut-off events. [2022-11-25 17:20:00,629 INFO L131 PetriNetUnfolder]: For 7/7 co-relation queries the response was YES. [2022-11-25 17:20:00,631 INFO L83 FinitePrefix]: Finished finitePrefix Result has 188 conditions, 87 events. 45/87 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 207 event pairs, 18 based on Foata normal form. 5/64 useless extension candidates. Maximal degree in co-relation 120. Up to 76 conditions per place. [2022-11-25 17:20:00,634 INFO L137 encePairwiseOnDemand]: 264/271 looper letters, 14 selfloop transitions, 2 changer transitions 5/23 dead transitions. [2022-11-25 17:20:00,634 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 24 places, 23 transitions, 106 flow [2022-11-25 17:20:00,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-25 17:20:00,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-11-25 17:20:00,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 481 transitions. [2022-11-25 17:20:00,665 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4437269372693727 [2022-11-25 17:20:00,666 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 481 transitions. [2022-11-25 17:20:00,667 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 481 transitions. [2022-11-25 17:20:00,672 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:20:00,675 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 481 transitions. [2022-11-25 17:20:00,680 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 120.25) internal successors, (481), 4 states have internal predecessors, (481), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:20:00,687 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 271.0) internal successors, (1355), 5 states have internal predecessors, (1355), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:20:00,688 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 271.0) internal successors, (1355), 5 states have internal predecessors, (1355), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:20:00,690 INFO L175 Difference]: Start difference. First operand has 21 places, 17 transitions, 46 flow. Second operand 4 states and 481 transitions. [2022-11-25 17:20:00,692 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 24 places, 23 transitions, 106 flow [2022-11-25 17:20:00,695 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 20 places, 23 transitions, 94 flow, removed 0 selfloop flow, removed 4 redundant places. [2022-11-25 17:20:00,698 INFO L231 Difference]: Finished difference. Result has 22 places, 18 transitions, 58 flow [2022-11-25 17:20:00,700 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=271, PETRI_DIFFERENCE_MINUEND_FLOW=38, PETRI_DIFFERENCE_MINUEND_PLACES=17, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=17, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=15, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=58, PETRI_PLACES=22, PETRI_TRANSITIONS=18} [2022-11-25 17:20:00,705 INFO L288 CegarLoopForPetriNet]: 21 programPoint places, 1 predicate places. [2022-11-25 17:20:00,706 INFO L495 AbstractCegarLoop]: Abstraction has has 22 places, 18 transitions, 58 flow [2022-11-25 17:20:00,706 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 117.0) internal successors, (468), 4 states have internal predecessors, (468), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:20:00,708 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:20:00,708 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:20:00,709 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-25 17:20:00,717 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-25 17:20:00,717 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:20:00,721 INFO L85 PathProgramCache]: Analyzing trace with hash -1559045595, now seen corresponding path program 1 times [2022-11-25 17:20:00,721 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:20:00,721 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [257160702] [2022-11-25 17:20:00,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:20:00,722 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:20:00,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:20:01,238 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-25 17:20:01,238 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:20:01,239 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [257160702] [2022-11-25 17:20:01,239 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [257160702] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:20:01,239 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 17:20:01,240 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-25 17:20:01,240 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1547412454] [2022-11-25 17:20:01,240 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:20:01,241 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-25 17:20:01,241 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:20:01,242 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-25 17:20:01,242 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-11-25 17:20:01,324 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 113 out of 271 [2022-11-25 17:20:01,326 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 22 places, 18 transitions, 58 flow. Second operand has 7 states, 7 states have (on average 115.0) internal successors, (805), 7 states have internal predecessors, (805), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:20:01,326 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:20:01,326 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 113 of 271 [2022-11-25 17:20:01,326 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:20:01,472 INFO L130 PetriNetUnfolder]: 72/136 cut-off events. [2022-11-25 17:20:01,472 INFO L131 PetriNetUnfolder]: For 18/21 co-relation queries the response was YES. [2022-11-25 17:20:01,473 INFO L83 FinitePrefix]: Finished finitePrefix Result has 362 conditions, 136 events. 72/136 cut-off events. For 18/21 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 414 event pairs, 15 based on Foata normal form. 1/95 useless extension candidates. Maximal degree in co-relation 350. Up to 77 conditions per place. [2022-11-25 17:20:01,474 INFO L137 encePairwiseOnDemand]: 264/271 looper letters, 32 selfloop transitions, 8 changer transitions 2/43 dead transitions. [2022-11-25 17:20:01,475 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 26 places, 43 transitions, 218 flow [2022-11-25 17:20:01,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-25 17:20:01,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-11-25 17:20:01,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 720 transitions. [2022-11-25 17:20:01,478 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.44280442804428044 [2022-11-25 17:20:01,478 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 720 transitions. [2022-11-25 17:20:01,478 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 720 transitions. [2022-11-25 17:20:01,479 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:20:01,479 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 720 transitions. [2022-11-25 17:20:01,482 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 120.0) internal successors, (720), 6 states have internal predecessors, (720), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:20:01,486 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 271.0) internal successors, (1897), 7 states have internal predecessors, (1897), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:20:01,488 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 271.0) internal successors, (1897), 7 states have internal predecessors, (1897), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:20:01,488 INFO L175 Difference]: Start difference. First operand has 22 places, 18 transitions, 58 flow. Second operand 6 states and 720 transitions. [2022-11-25 17:20:01,488 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 26 places, 43 transitions, 218 flow [2022-11-25 17:20:01,489 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 25 places, 43 transitions, 214 flow, removed 1 selfloop flow, removed 1 redundant places. [2022-11-25 17:20:01,490 INFO L231 Difference]: Finished difference. Result has 28 places, 24 transitions, 112 flow [2022-11-25 17:20:01,491 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=271, PETRI_DIFFERENCE_MINUEND_FLOW=54, PETRI_DIFFERENCE_MINUEND_PLACES=20, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=18, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=12, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=112, PETRI_PLACES=28, PETRI_TRANSITIONS=24} [2022-11-25 17:20:01,495 INFO L288 CegarLoopForPetriNet]: 21 programPoint places, 7 predicate places. [2022-11-25 17:20:01,495 INFO L495 AbstractCegarLoop]: Abstraction has has 28 places, 24 transitions, 112 flow [2022-11-25 17:20:01,496 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 115.0) internal successors, (805), 7 states have internal predecessors, (805), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:20:01,496 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:20:01,497 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:20:01,497 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-25 17:20:01,498 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-25 17:20:01,502 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:20:01,502 INFO L85 PathProgramCache]: Analyzing trace with hash -1643190536, now seen corresponding path program 1 times [2022-11-25 17:20:01,502 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:20:01,502 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1140819428] [2022-11-25 17:20:01,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:20:01,504 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:20:01,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:20:01,690 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-25 17:20:01,691 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:20:01,691 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1140819428] [2022-11-25 17:20:01,691 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1140819428] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:20:01,692 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [78581037] [2022-11-25 17:20:01,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:20:01,692 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:20:01,692 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff2a69db-f292-4098-8ca3-ff948148af61/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:20:01,696 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff2a69db-f292-4098-8ca3-ff948148af61/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:20:01,731 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff2a69db-f292-4098-8ca3-ff948148af61/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-25 17:20:01,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:20:01,828 INFO L263 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-25 17:20:01,838 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:20:02,105 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:20:02,106 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:20:02,352 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:20:02,353 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [78581037] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:20:02,353 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 17:20:02,353 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 6, 6] total 14 [2022-11-25 17:20:02,353 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2027040985] [2022-11-25 17:20:02,353 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 17:20:02,354 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-11-25 17:20:02,354 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:20:02,354 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-11-25 17:20:02,355 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2022-11-25 17:20:02,543 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 108 out of 271 [2022-11-25 17:20:02,546 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 28 places, 24 transitions, 112 flow. Second operand has 15 states, 15 states have (on average 110.53333333333333) internal successors, (1658), 15 states have internal predecessors, (1658), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:20:02,547 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:20:02,547 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 108 of 271 [2022-11-25 17:20:02,547 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:20:02,850 INFO L130 PetriNetUnfolder]: 123/260 cut-off events. [2022-11-25 17:20:02,850 INFO L131 PetriNetUnfolder]: For 209/214 co-relation queries the response was YES. [2022-11-25 17:20:02,854 INFO L83 FinitePrefix]: Finished finitePrefix Result has 861 conditions, 260 events. 123/260 cut-off events. For 209/214 co-relation queries the response was YES. Maximal size of possible extension queue 27. Compared 1025 event pairs, 12 based on Foata normal form. 38/262 useless extension candidates. Maximal degree in co-relation 681. Up to 153 conditions per place. [2022-11-25 17:20:02,858 INFO L137 encePairwiseOnDemand]: 264/271 looper letters, 47 selfloop transitions, 14 changer transitions 5/68 dead transitions. [2022-11-25 17:20:02,858 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 36 places, 68 transitions, 417 flow [2022-11-25 17:20:02,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-25 17:20:02,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-11-25 17:20:02,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1038 transitions. [2022-11-25 17:20:02,862 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.42558425584255843 [2022-11-25 17:20:02,862 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1038 transitions. [2022-11-25 17:20:02,862 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1038 transitions. [2022-11-25 17:20:02,863 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:20:02,863 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1038 transitions. [2022-11-25 17:20:02,866 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 115.33333333333333) internal successors, (1038), 9 states have internal predecessors, (1038), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:20:02,871 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 271.0) internal successors, (2710), 10 states have internal predecessors, (2710), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:20:02,872 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 271.0) internal successors, (2710), 10 states have internal predecessors, (2710), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:20:02,872 INFO L175 Difference]: Start difference. First operand has 28 places, 24 transitions, 112 flow. Second operand 9 states and 1038 transitions. [2022-11-25 17:20:02,873 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 36 places, 68 transitions, 417 flow [2022-11-25 17:20:02,875 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 34 places, 68 transitions, 394 flow, removed 6 selfloop flow, removed 2 redundant places. [2022-11-25 17:20:02,877 INFO L231 Difference]: Finished difference. Result has 40 places, 31 transitions, 211 flow [2022-11-25 17:20:02,877 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=271, PETRI_DIFFERENCE_MINUEND_FLOW=89, PETRI_DIFFERENCE_MINUEND_PLACES=26, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=22, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=12, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=211, PETRI_PLACES=40, PETRI_TRANSITIONS=31} [2022-11-25 17:20:02,879 INFO L288 CegarLoopForPetriNet]: 21 programPoint places, 19 predicate places. [2022-11-25 17:20:02,880 INFO L495 AbstractCegarLoop]: Abstraction has has 40 places, 31 transitions, 211 flow [2022-11-25 17:20:02,881 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 110.53333333333333) internal successors, (1658), 15 states have internal predecessors, (1658), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:20:02,882 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:20:02,882 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:20:02,892 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff2a69db-f292-4098-8ca3-ff948148af61/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-11-25 17:20:03,087 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff2a69db-f292-4098-8ca3-ff948148af61/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:20:03,087 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-25 17:20:03,088 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:20:03,088 INFO L85 PathProgramCache]: Analyzing trace with hash 1803714767, now seen corresponding path program 1 times [2022-11-25 17:20:03,088 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:20:03,088 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1672747118] [2022-11-25 17:20:03,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:20:03,088 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:20:03,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:20:03,271 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:20:03,272 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:20:03,273 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1672747118] [2022-11-25 17:20:03,273 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1672747118] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:20:03,273 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1149239888] [2022-11-25 17:20:03,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:20:03,274 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:20:03,274 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff2a69db-f292-4098-8ca3-ff948148af61/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:20:03,275 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff2a69db-f292-4098-8ca3-ff948148af61/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:20:03,283 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff2a69db-f292-4098-8ca3-ff948148af61/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-25 17:20:03,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:20:03,383 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-25 17:20:03,385 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:20:03,463 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:20:03,463 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:20:03,525 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:20:03,526 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1149239888] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:20:03,526 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 17:20:03,526 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 11 [2022-11-25 17:20:03,527 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2048585132] [2022-11-25 17:20:03,527 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 17:20:03,527 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-25 17:20:03,527 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:20:03,529 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-25 17:20:03,529 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2022-11-25 17:20:03,639 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 110 out of 271 [2022-11-25 17:20:03,640 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 40 places, 31 transitions, 211 flow. Second operand has 12 states, 12 states have (on average 112.0) internal successors, (1344), 12 states have internal predecessors, (1344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:20:03,641 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:20:03,641 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 110 of 271 [2022-11-25 17:20:03,641 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:20:03,784 INFO L130 PetriNetUnfolder]: 81/179 cut-off events. [2022-11-25 17:20:03,784 INFO L131 PetriNetUnfolder]: For 411/416 co-relation queries the response was YES. [2022-11-25 17:20:03,786 INFO L83 FinitePrefix]: Finished finitePrefix Result has 781 conditions, 179 events. 81/179 cut-off events. For 411/416 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 585 event pairs, 36 based on Foata normal form. 11/162 useless extension candidates. Maximal degree in co-relation 752. Up to 158 conditions per place. [2022-11-25 17:20:03,787 INFO L137 encePairwiseOnDemand]: 266/271 looper letters, 23 selfloop transitions, 3 changer transitions 10/38 dead transitions. [2022-11-25 17:20:03,787 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 38 transitions, 300 flow [2022-11-25 17:20:03,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-25 17:20:03,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-11-25 17:20:03,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 689 transitions. [2022-11-25 17:20:03,790 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4237392373923739 [2022-11-25 17:20:03,790 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 689 transitions. [2022-11-25 17:20:03,790 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 689 transitions. [2022-11-25 17:20:03,791 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:20:03,791 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 689 transitions. [2022-11-25 17:20:03,793 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 114.83333333333333) internal successors, (689), 6 states have internal predecessors, (689), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:20:03,796 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 271.0) internal successors, (1897), 7 states have internal predecessors, (1897), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:20:03,796 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 271.0) internal successors, (1897), 7 states have internal predecessors, (1897), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:20:03,797 INFO L175 Difference]: Start difference. First operand has 40 places, 31 transitions, 211 flow. Second operand 6 states and 689 transitions. [2022-11-25 17:20:03,797 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 38 transitions, 300 flow [2022-11-25 17:20:03,829 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 38 transitions, 267 flow, removed 15 selfloop flow, removed 3 redundant places. [2022-11-25 17:20:03,830 INFO L231 Difference]: Finished difference. Result has 42 places, 28 transitions, 169 flow [2022-11-25 17:20:03,830 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=271, PETRI_DIFFERENCE_MINUEND_FLOW=178, PETRI_DIFFERENCE_MINUEND_PLACES=36, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=169, PETRI_PLACES=42, PETRI_TRANSITIONS=28} [2022-11-25 17:20:03,831 INFO L288 CegarLoopForPetriNet]: 21 programPoint places, 21 predicate places. [2022-11-25 17:20:03,831 INFO L495 AbstractCegarLoop]: Abstraction has has 42 places, 28 transitions, 169 flow [2022-11-25 17:20:03,832 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 112.0) internal successors, (1344), 12 states have internal predecessors, (1344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:20:03,832 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:20:03,832 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:20:03,843 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff2a69db-f292-4098-8ca3-ff948148af61/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-25 17:20:04,032 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff2a69db-f292-4098-8ca3-ff948148af61/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:20:04,032 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-25 17:20:04,033 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:20:04,033 INFO L85 PathProgramCache]: Analyzing trace with hash 1196624479, now seen corresponding path program 2 times [2022-11-25 17:20:04,033 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:20:04,033 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [657494577] [2022-11-25 17:20:04,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:20:04,034 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:20:04,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:20:05,095 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:20:05,096 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:20:05,096 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [657494577] [2022-11-25 17:20:05,096 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [657494577] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:20:05,096 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [905618421] [2022-11-25 17:20:05,096 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-25 17:20:05,097 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:20:05,097 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff2a69db-f292-4098-8ca3-ff948148af61/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:20:05,099 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff2a69db-f292-4098-8ca3-ff948148af61/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:20:05,127 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff2a69db-f292-4098-8ca3-ff948148af61/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-25 17:20:05,213 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-25 17:20:05,213 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 17:20:05,215 INFO L263 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 40 conjunts are in the unsatisfiable core [2022-11-25 17:20:05,217 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:20:05,473 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 17:20:05,481 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 21 [2022-11-25 17:20:05,611 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:20:05,612 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:20:05,838 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 17:20:05,839 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 41 [2022-11-25 17:20:05,845 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 18 [2022-11-25 17:20:06,164 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:20:06,164 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [905618421] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:20:06,164 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 17:20:06,164 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 22 [2022-11-25 17:20:06,165 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [131442691] [2022-11-25 17:20:06,165 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 17:20:06,165 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-11-25 17:20:06,165 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:20:06,166 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-11-25 17:20:06,166 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=417, Unknown=0, NotChecked=0, Total=506 [2022-11-25 17:20:07,292 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 98 out of 271 [2022-11-25 17:20:07,295 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 28 transitions, 169 flow. Second operand has 23 states, 23 states have (on average 99.6086956521739) internal successors, (2291), 23 states have internal predecessors, (2291), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:20:07,295 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:20:07,295 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 98 of 271 [2022-11-25 17:20:07,295 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:20:15,154 INFO L130 PetriNetUnfolder]: 339/697 cut-off events. [2022-11-25 17:20:15,155 INFO L131 PetriNetUnfolder]: For 1648/1656 co-relation queries the response was YES. [2022-11-25 17:20:15,157 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3103 conditions, 697 events. 339/697 cut-off events. For 1648/1656 co-relation queries the response was YES. Maximal size of possible extension queue 62. Compared 3579 event pairs, 20 based on Foata normal form. 58/636 useless extension candidates. Maximal degree in co-relation 3077. Up to 337 conditions per place. [2022-11-25 17:20:15,162 INFO L137 encePairwiseOnDemand]: 263/271 looper letters, 141 selfloop transitions, 82 changer transitions 1/226 dead transitions. [2022-11-25 17:20:15,162 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 226 transitions, 1759 flow [2022-11-25 17:20:15,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-11-25 17:20:15,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2022-11-25 17:20:15,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 3836 transitions. [2022-11-25 17:20:15,173 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.3825670689139324 [2022-11-25 17:20:15,174 INFO L72 ComplementDD]: Start complementDD. Operand 37 states and 3836 transitions. [2022-11-25 17:20:15,174 INFO L73 IsDeterministic]: Start isDeterministic. Operand 37 states and 3836 transitions. [2022-11-25 17:20:15,176 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:20:15,177 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 37 states and 3836 transitions. [2022-11-25 17:20:15,187 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 38 states, 37 states have (on average 103.67567567567568) internal successors, (3836), 37 states have internal predecessors, (3836), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:20:15,204 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 38 states, 38 states have (on average 271.0) internal successors, (10298), 38 states have internal predecessors, (10298), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:20:15,208 INFO L81 ComplementDD]: Finished complementDD. Result has 38 states, 38 states have (on average 271.0) internal successors, (10298), 38 states have internal predecessors, (10298), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:20:15,208 INFO L175 Difference]: Start difference. First operand has 42 places, 28 transitions, 169 flow. Second operand 37 states and 3836 transitions. [2022-11-25 17:20:15,208 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 226 transitions, 1759 flow [2022-11-25 17:20:15,217 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 226 transitions, 1573 flow, removed 90 selfloop flow, removed 6 redundant places. [2022-11-25 17:20:15,222 INFO L231 Difference]: Finished difference. Result has 72 places, 123 transitions, 1139 flow [2022-11-25 17:20:15,222 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=271, PETRI_DIFFERENCE_MINUEND_FLOW=151, PETRI_DIFFERENCE_MINUEND_PLACES=31, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=28, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=9, PETRI_DIFFERENCE_SUBTRAHEND_STATES=37, PETRI_FLOW=1139, PETRI_PLACES=72, PETRI_TRANSITIONS=123} [2022-11-25 17:20:15,225 INFO L288 CegarLoopForPetriNet]: 21 programPoint places, 51 predicate places. [2022-11-25 17:20:15,225 INFO L495 AbstractCegarLoop]: Abstraction has has 72 places, 123 transitions, 1139 flow [2022-11-25 17:20:15,226 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 99.6086956521739) internal successors, (2291), 23 states have internal predecessors, (2291), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:20:15,226 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:20:15,226 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:20:15,240 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff2a69db-f292-4098-8ca3-ff948148af61/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-11-25 17:20:15,432 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff2a69db-f292-4098-8ca3-ff948148af61/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:20:15,433 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-25 17:20:15,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:20:15,433 INFO L85 PathProgramCache]: Analyzing trace with hash 536642665, now seen corresponding path program 3 times [2022-11-25 17:20:15,433 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:20:15,434 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1478130062] [2022-11-25 17:20:15,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:20:15,434 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:20:15,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:20:16,180 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:20:16,181 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:20:16,181 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1478130062] [2022-11-25 17:20:16,181 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1478130062] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:20:16,181 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [720961013] [2022-11-25 17:20:16,181 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-25 17:20:16,182 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:20:16,182 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff2a69db-f292-4098-8ca3-ff948148af61/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:20:16,184 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff2a69db-f292-4098-8ca3-ff948148af61/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:20:16,211 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff2a69db-f292-4098-8ca3-ff948148af61/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-25 17:20:16,294 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-25 17:20:16,294 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 17:20:16,296 INFO L263 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 38 conjunts are in the unsatisfiable core [2022-11-25 17:20:16,298 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:20:16,589 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 17:20:16,590 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2022-11-25 17:20:16,712 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:20:16,712 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:20:16,926 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 17:20:16,926 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 41 [2022-11-25 17:20:16,932 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 18 [2022-11-25 17:20:17,256 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:20:17,256 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [720961013] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:20:17,256 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 17:20:17,257 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 22 [2022-11-25 17:20:17,257 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [974608355] [2022-11-25 17:20:17,257 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 17:20:17,257 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-11-25 17:20:17,257 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:20:17,258 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-11-25 17:20:17,258 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=414, Unknown=0, NotChecked=0, Total=506 [2022-11-25 17:20:18,525 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 99 out of 271 [2022-11-25 17:20:18,528 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 123 transitions, 1139 flow. Second operand has 23 states, 23 states have (on average 100.78260869565217) internal successors, (2318), 23 states have internal predecessors, (2318), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:20:18,528 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:20:18,528 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 99 of 271 [2022-11-25 17:20:18,529 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:20:20,620 INFO L130 PetriNetUnfolder]: 370/748 cut-off events. [2022-11-25 17:20:20,620 INFO L131 PetriNetUnfolder]: For 1663/1666 co-relation queries the response was YES. [2022-11-25 17:20:20,623 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3518 conditions, 748 events. 370/748 cut-off events. For 1663/1666 co-relation queries the response was YES. Maximal size of possible extension queue 61. Compared 3779 event pairs, 45 based on Foata normal form. 21/643 useless extension candidates. Maximal degree in co-relation 2252. Up to 379 conditions per place. [2022-11-25 17:20:20,627 INFO L137 encePairwiseOnDemand]: 263/271 looper letters, 117 selfloop transitions, 67 changer transitions 0/186 dead transitions. [2022-11-25 17:20:20,631 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 186 transitions, 1815 flow [2022-11-25 17:20:20,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-11-25 17:20:20,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2022-11-25 17:20:20,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 2189 transitions. [2022-11-25 17:20:20,639 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.38464241785274994 [2022-11-25 17:20:20,639 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 2189 transitions. [2022-11-25 17:20:20,639 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 2189 transitions. [2022-11-25 17:20:20,641 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:20:20,641 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 2189 transitions. [2022-11-25 17:20:20,646 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 104.23809523809524) internal successors, (2189), 21 states have internal predecessors, (2189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:20:20,654 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 271.0) internal successors, (5962), 22 states have internal predecessors, (5962), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:20:20,656 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 271.0) internal successors, (5962), 22 states have internal predecessors, (5962), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:20:20,656 INFO L175 Difference]: Start difference. First operand has 72 places, 123 transitions, 1139 flow. Second operand 21 states and 2189 transitions. [2022-11-25 17:20:20,656 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 186 transitions, 1815 flow [2022-11-25 17:20:20,666 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 186 transitions, 1271 flow, removed 268 selfloop flow, removed 5 redundant places. [2022-11-25 17:20:20,670 INFO L231 Difference]: Finished difference. Result has 91 places, 131 transitions, 929 flow [2022-11-25 17:20:20,671 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=271, PETRI_DIFFERENCE_MINUEND_FLOW=678, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=119, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=929, PETRI_PLACES=91, PETRI_TRANSITIONS=131} [2022-11-25 17:20:20,673 INFO L288 CegarLoopForPetriNet]: 21 programPoint places, 70 predicate places. [2022-11-25 17:20:20,673 INFO L495 AbstractCegarLoop]: Abstraction has has 91 places, 131 transitions, 929 flow [2022-11-25 17:20:20,674 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 100.78260869565217) internal successors, (2318), 23 states have internal predecessors, (2318), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:20:20,675 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:20:20,675 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:20:20,680 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff2a69db-f292-4098-8ca3-ff948148af61/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-25 17:20:20,880 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff2a69db-f292-4098-8ca3-ff948148af61/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:20:20,880 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-25 17:20:20,881 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:20:20,881 INFO L85 PathProgramCache]: Analyzing trace with hash 1043123272, now seen corresponding path program 1 times [2022-11-25 17:20:20,881 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:20:20,881 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1866291947] [2022-11-25 17:20:20,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:20:20,881 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:20:20,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:20:21,754 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:20:21,755 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:20:21,755 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1866291947] [2022-11-25 17:20:21,755 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1866291947] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:20:21,755 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1637073892] [2022-11-25 17:20:21,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:20:21,755 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:20:21,756 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff2a69db-f292-4098-8ca3-ff948148af61/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:20:21,757 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff2a69db-f292-4098-8ca3-ff948148af61/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:20:21,779 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff2a69db-f292-4098-8ca3-ff948148af61/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-25 17:20:21,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:20:21,866 INFO L263 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 45 conjunts are in the unsatisfiable core [2022-11-25 17:20:21,868 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:20:22,322 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-25 17:20:22,365 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:20:22,366 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:20:22,485 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 17:20:22,486 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 30 [2022-11-25 17:20:22,834 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:20:22,835 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1637073892] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:20:22,835 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 17:20:22,835 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 23 [2022-11-25 17:20:22,835 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [20164774] [2022-11-25 17:20:22,835 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 17:20:22,836 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-11-25 17:20:22,836 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:20:22,836 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-11-25 17:20:22,836 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=481, Unknown=0, NotChecked=0, Total=600 [2022-11-25 17:20:23,922 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 94 out of 271 [2022-11-25 17:20:23,925 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 91 places, 131 transitions, 929 flow. Second operand has 25 states, 25 states have (on average 95.88) internal successors, (2397), 25 states have internal predecessors, (2397), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:20:23,926 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:20:23,926 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 94 of 271 [2022-11-25 17:20:23,926 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:20:25,192 INFO L130 PetriNetUnfolder]: 541/1080 cut-off events. [2022-11-25 17:20:25,192 INFO L131 PetriNetUnfolder]: For 1409/1409 co-relation queries the response was YES. [2022-11-25 17:20:25,196 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4132 conditions, 1080 events. 541/1080 cut-off events. For 1409/1409 co-relation queries the response was YES. Maximal size of possible extension queue 90. Compared 6031 event pairs, 47 based on Foata normal form. 6/971 useless extension candidates. Maximal degree in co-relation 3863. Up to 746 conditions per place. [2022-11-25 17:20:25,201 INFO L137 encePairwiseOnDemand]: 261/271 looper letters, 162 selfloop transitions, 74 changer transitions 7/244 dead transitions. [2022-11-25 17:20:25,201 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 107 places, 244 transitions, 2055 flow [2022-11-25 17:20:25,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-11-25 17:20:25,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2022-11-25 17:20:25,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 1696 transitions. [2022-11-25 17:20:25,206 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.36813544606034293 [2022-11-25 17:20:25,206 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 1696 transitions. [2022-11-25 17:20:25,207 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 1696 transitions. [2022-11-25 17:20:25,208 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:20:25,208 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 1696 transitions. [2022-11-25 17:20:25,212 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 99.76470588235294) internal successors, (1696), 17 states have internal predecessors, (1696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:20:25,218 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 271.0) internal successors, (4878), 18 states have internal predecessors, (4878), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:20:25,220 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 271.0) internal successors, (4878), 18 states have internal predecessors, (4878), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:20:25,220 INFO L175 Difference]: Start difference. First operand has 91 places, 131 transitions, 929 flow. Second operand 17 states and 1696 transitions. [2022-11-25 17:20:25,220 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 107 places, 244 transitions, 2055 flow [2022-11-25 17:20:25,233 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 97 places, 244 transitions, 1995 flow, removed 6 selfloop flow, removed 10 redundant places. [2022-11-25 17:20:25,237 INFO L231 Difference]: Finished difference. Result has 104 places, 190 transitions, 1658 flow [2022-11-25 17:20:25,238 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=271, PETRI_DIFFERENCE_MINUEND_FLOW=884, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=131, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=1658, PETRI_PLACES=104, PETRI_TRANSITIONS=190} [2022-11-25 17:20:25,238 INFO L288 CegarLoopForPetriNet]: 21 programPoint places, 83 predicate places. [2022-11-25 17:20:25,239 INFO L495 AbstractCegarLoop]: Abstraction has has 104 places, 190 transitions, 1658 flow [2022-11-25 17:20:25,240 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 95.88) internal successors, (2397), 25 states have internal predecessors, (2397), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:20:25,240 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:20:25,240 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:20:25,257 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff2a69db-f292-4098-8ca3-ff948148af61/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-25 17:20:25,446 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff2a69db-f292-4098-8ca3-ff948148af61/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2022-11-25 17:20:25,446 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-25 17:20:25,446 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:20:25,447 INFO L85 PathProgramCache]: Analyzing trace with hash -1502755722, now seen corresponding path program 2 times [2022-11-25 17:20:25,447 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:20:25,447 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1751292198] [2022-11-25 17:20:25,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:20:25,447 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:20:25,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:20:26,278 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:20:26,279 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:20:26,279 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1751292198] [2022-11-25 17:20:26,279 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1751292198] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:20:26,279 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [744731127] [2022-11-25 17:20:26,280 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-25 17:20:26,280 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:20:26,280 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff2a69db-f292-4098-8ca3-ff948148af61/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:20:26,284 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff2a69db-f292-4098-8ca3-ff948148af61/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:20:26,296 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff2a69db-f292-4098-8ca3-ff948148af61/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-25 17:20:26,404 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-25 17:20:26,404 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 17:20:26,406 INFO L263 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 43 conjunts are in the unsatisfiable core [2022-11-25 17:20:26,408 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:20:26,734 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 7 [2022-11-25 17:20:26,853 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:20:26,853 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:20:27,044 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 17:20:27,045 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 30 [2022-11-25 17:20:27,481 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:20:27,481 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [744731127] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:20:27,481 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 17:20:27,482 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 24 [2022-11-25 17:20:27,482 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [544793020] [2022-11-25 17:20:27,482 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 17:20:27,482 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-11-25 17:20:27,482 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:20:27,483 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-11-25 17:20:27,483 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=532, Unknown=0, NotChecked=0, Total=650 [2022-11-25 17:20:28,697 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 94 out of 271 [2022-11-25 17:20:28,700 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 104 places, 190 transitions, 1658 flow. Second operand has 26 states, 26 states have (on average 95.84615384615384) internal successors, (2492), 26 states have internal predecessors, (2492), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:20:28,701 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:20:28,701 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 94 of 271 [2022-11-25 17:20:28,701 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:20:31,477 INFO L130 PetriNetUnfolder]: 689/1394 cut-off events. [2022-11-25 17:20:31,478 INFO L131 PetriNetUnfolder]: For 3125/3125 co-relation queries the response was YES. [2022-11-25 17:20:31,483 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6087 conditions, 1394 events. 689/1394 cut-off events. For 3125/3125 co-relation queries the response was YES. Maximal size of possible extension queue 124. Compared 8496 event pairs, 61 based on Foata normal form. 10/1319 useless extension candidates. Maximal degree in co-relation 5796. Up to 766 conditions per place. [2022-11-25 17:20:31,491 INFO L137 encePairwiseOnDemand]: 261/271 looper letters, 200 selfloop transitions, 110 changer transitions 30/341 dead transitions. [2022-11-25 17:20:31,491 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 131 places, 341 transitions, 3231 flow [2022-11-25 17:20:31,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-11-25 17:20:31,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2022-11-25 17:20:31,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 2789 transitions. [2022-11-25 17:20:31,500 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.367554032683184 [2022-11-25 17:20:31,500 INFO L72 ComplementDD]: Start complementDD. Operand 28 states and 2789 transitions. [2022-11-25 17:20:31,500 INFO L73 IsDeterministic]: Start isDeterministic. Operand 28 states and 2789 transitions. [2022-11-25 17:20:31,502 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:20:31,502 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 28 states and 2789 transitions. [2022-11-25 17:20:31,520 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 29 states, 28 states have (on average 99.60714285714286) internal successors, (2789), 28 states have internal predecessors, (2789), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:20:31,530 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 29 states, 29 states have (on average 271.0) internal successors, (7859), 29 states have internal predecessors, (7859), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:20:31,533 INFO L81 ComplementDD]: Finished complementDD. Result has 29 states, 29 states have (on average 271.0) internal successors, (7859), 29 states have internal predecessors, (7859), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:20:31,534 INFO L175 Difference]: Start difference. First operand has 104 places, 190 transitions, 1658 flow. Second operand 28 states and 2789 transitions. [2022-11-25 17:20:31,534 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 131 places, 341 transitions, 3231 flow [2022-11-25 17:20:31,558 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 127 places, 341 transitions, 3184 flow, removed 19 selfloop flow, removed 4 redundant places. [2022-11-25 17:20:31,567 INFO L231 Difference]: Finished difference. Result has 140 places, 232 transitions, 2440 flow [2022-11-25 17:20:31,568 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=271, PETRI_DIFFERENCE_MINUEND_FLOW=1613, PETRI_DIFFERENCE_MINUEND_PLACES=100, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=190, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=69, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=97, PETRI_DIFFERENCE_SUBTRAHEND_STATES=28, PETRI_FLOW=2440, PETRI_PLACES=140, PETRI_TRANSITIONS=232} [2022-11-25 17:20:31,570 INFO L288 CegarLoopForPetriNet]: 21 programPoint places, 119 predicate places. [2022-11-25 17:20:31,570 INFO L495 AbstractCegarLoop]: Abstraction has has 140 places, 232 transitions, 2440 flow [2022-11-25 17:20:31,571 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 95.84615384615384) internal successors, (2492), 26 states have internal predecessors, (2492), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:20:31,571 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:20:31,571 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:20:31,582 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff2a69db-f292-4098-8ca3-ff948148af61/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-25 17:20:31,777 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff2a69db-f292-4098-8ca3-ff948148af61/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:20:31,777 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-25 17:20:31,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:20:31,778 INFO L85 PathProgramCache]: Analyzing trace with hash -390139697, now seen corresponding path program 4 times [2022-11-25 17:20:31,778 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:20:31,778 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [143173270] [2022-11-25 17:20:31,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:20:31,778 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:20:31,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:20:32,698 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:20:32,698 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:20:32,699 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [143173270] [2022-11-25 17:20:32,699 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [143173270] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:20:32,699 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1325464553] [2022-11-25 17:20:32,699 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-25 17:20:32,699 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:20:32,700 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff2a69db-f292-4098-8ca3-ff948148af61/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:20:32,704 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff2a69db-f292-4098-8ca3-ff948148af61/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:20:32,713 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff2a69db-f292-4098-8ca3-ff948148af61/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-25 17:20:32,823 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-25 17:20:32,823 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 17:20:32,824 INFO L263 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 22 conjunts are in the unsatisfiable core [2022-11-25 17:20:32,826 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:20:32,955 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 17:20:32,956 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2022-11-25 17:20:32,985 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-25 17:20:32,985 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:20:33,018 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_265 (Array Int Int))) (not (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_265) c_~q~0.base) (+ (* c_~q_front~0 4) c_~q~0.offset)) 0))) is different from false [2022-11-25 17:20:33,033 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 17:20:33,034 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 41 [2022-11-25 17:20:33,046 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 18 [2022-11-25 17:20:33,163 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-25 17:20:33,163 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1325464553] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-25 17:20:33,163 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-25 17:20:33,163 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [8, 6] total 17 [2022-11-25 17:20:33,164 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1891059932] [2022-11-25 17:20:33,164 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:20:33,164 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-25 17:20:33,164 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:20:33,164 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-25 17:20:33,165 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=228, Unknown=1, NotChecked=30, Total=306 [2022-11-25 17:20:33,175 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 100 out of 271 [2022-11-25 17:20:33,176 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 140 places, 232 transitions, 2440 flow. Second operand has 6 states, 6 states have (on average 102.33333333333333) internal successors, (614), 6 states have internal predecessors, (614), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:20:33,176 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:20:33,176 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 100 of 271 [2022-11-25 17:20:33,176 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:20:33,223 WARN L837 $PredicateComparison]: unable to prove that (let ((.cse0 (+ (* c_~q_front~0 4) c_~q~0.offset))) (and (not (= (select (select |c_#memory_int| c_~q~0.base) .cse0) 0)) (forall ((v_ArrVal_265 (Array Int Int))) (not (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_265) c_~q~0.base) .cse0) 0))))) is different from false [2022-11-25 17:20:33,515 INFO L130 PetriNetUnfolder]: 674/1299 cut-off events. [2022-11-25 17:20:33,516 INFO L131 PetriNetUnfolder]: For 5765/5775 co-relation queries the response was YES. [2022-11-25 17:20:33,523 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6705 conditions, 1299 events. 674/1299 cut-off events. For 5765/5775 co-relation queries the response was YES. Maximal size of possible extension queue 107. Compared 7374 event pairs, 123 based on Foata normal form. 16/1246 useless extension candidates. Maximal degree in co-relation 6616. Up to 1188 conditions per place. [2022-11-25 17:20:33,531 INFO L137 encePairwiseOnDemand]: 263/271 looper letters, 227 selfloop transitions, 42 changer transitions 0/272 dead transitions. [2022-11-25 17:20:33,531 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 140 places, 272 transitions, 3416 flow [2022-11-25 17:20:33,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-25 17:20:33,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-11-25 17:20:33,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 532 transitions. [2022-11-25 17:20:33,533 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.392619926199262 [2022-11-25 17:20:33,533 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 532 transitions. [2022-11-25 17:20:33,533 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 532 transitions. [2022-11-25 17:20:33,534 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:20:33,534 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 532 transitions. [2022-11-25 17:20:33,535 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 106.4) internal successors, (532), 5 states have internal predecessors, (532), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:20:33,537 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 271.0) internal successors, (1626), 6 states have internal predecessors, (1626), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:20:33,538 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 271.0) internal successors, (1626), 6 states have internal predecessors, (1626), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:20:33,538 INFO L175 Difference]: Start difference. First operand has 140 places, 232 transitions, 2440 flow. Second operand 5 states and 532 transitions. [2022-11-25 17:20:33,538 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 140 places, 272 transitions, 3416 flow [2022-11-25 17:20:33,594 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 128 places, 272 transitions, 3308 flow, removed 31 selfloop flow, removed 12 redundant places. [2022-11-25 17:20:33,600 INFO L231 Difference]: Finished difference. Result has 130 places, 257 transitions, 2850 flow [2022-11-25 17:20:33,601 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=271, PETRI_DIFFERENCE_MINUEND_FLOW=2307, PETRI_DIFFERENCE_MINUEND_PLACES=124, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=227, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=191, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=2850, PETRI_PLACES=130, PETRI_TRANSITIONS=257} [2022-11-25 17:20:33,601 INFO L288 CegarLoopForPetriNet]: 21 programPoint places, 109 predicate places. [2022-11-25 17:20:33,601 INFO L495 AbstractCegarLoop]: Abstraction has has 130 places, 257 transitions, 2850 flow [2022-11-25 17:20:33,602 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 102.33333333333333) internal successors, (614), 6 states have internal predecessors, (614), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:20:33,602 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:20:33,602 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:20:33,612 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff2a69db-f292-4098-8ca3-ff948148af61/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-25 17:20:33,807 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff2a69db-f292-4098-8ca3-ff948148af61/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:20:33,808 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-25 17:20:33,808 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:20:33,808 INFO L85 PathProgramCache]: Analyzing trace with hash 1242247942, now seen corresponding path program 3 times [2022-11-25 17:20:33,808 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:20:33,808 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1461827173] [2022-11-25 17:20:33,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:20:33,808 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:20:33,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:20:34,949 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:20:34,950 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:20:34,950 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1461827173] [2022-11-25 17:20:34,950 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1461827173] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:20:34,950 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1602648827] [2022-11-25 17:20:34,950 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-25 17:20:34,950 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:20:34,950 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff2a69db-f292-4098-8ca3-ff948148af61/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:20:34,957 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff2a69db-f292-4098-8ca3-ff948148af61/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:20:34,964 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff2a69db-f292-4098-8ca3-ff948148af61/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-25 17:20:35,092 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-25 17:20:35,092 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 17:20:35,094 INFO L263 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 56 conjunts are in the unsatisfiable core [2022-11-25 17:20:35,096 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:20:35,455 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 17:20:35,456 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2022-11-25 17:20:35,665 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 7 [2022-11-25 17:20:35,812 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:20:35,812 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:20:36,289 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 17:20:36,290 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 86 treesize of output 74 [2022-11-25 17:20:36,298 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 57 treesize of output 51 [2022-11-25 17:20:36,304 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 45 [2022-11-25 17:20:36,825 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:20:36,825 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1602648827] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:20:36,826 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 17:20:36,826 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 29 [2022-11-25 17:20:36,826 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [433103279] [2022-11-25 17:20:36,826 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 17:20:36,826 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-11-25 17:20:36,826 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:20:36,827 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-11-25 17:20:36,827 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=795, Unknown=1, NotChecked=0, Total=930 [2022-11-25 17:20:37,662 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 77 out of 271 [2022-11-25 17:20:37,663 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 130 places, 257 transitions, 2850 flow. Second operand has 31 states, 31 states have (on average 78.58064516129032) internal successors, (2436), 31 states have internal predecessors, (2436), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:20:37,664 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:20:37,664 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 77 of 271 [2022-11-25 17:20:37,664 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:20:41,758 WARN L837 $PredicateComparison]: unable to prove that (let ((.cse2 (+ c_~q_front~0 1)) (.cse5 (+ c_~N~0 1)) (.cse6 (+ (* c_~q_front~0 4) c_~q~0.offset))) (let ((.cse0 (let ((.cse7 (+ c_~s~0 (select (select |c_#memory_int| c_~q~0.base) .cse6)))) (and (<= c_~N~0 .cse7) (< .cse7 .cse5)))) (.cse1 (< .cse2 0)) (.cse3 (< |c_thread1Thread1of1ForFork1_~i~0#1| c_~N~0)) (.cse4 (< c_~n~0 (+ c_~q_front~0 2)))) (and (<= c_~N~0 c_~s~0) (or .cse0 .cse1 (<= c_~n~0 .cse2) (<= c_~q_back~0 .cse2)) (or .cse0 .cse1 .cse3 .cse4) (< c_~s~0 .cse5) (or .cse1 (and (forall ((v_ArrVal_300 (Array Int Int))) (< (+ c_~s~0 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_300) c_~q~0.base) .cse6)) .cse5)) (forall ((v_ArrVal_300 (Array Int Int))) (<= c_~N~0 (+ c_~s~0 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_300) c_~q~0.base) .cse6))))) .cse3 .cse4)))) is different from false [2022-11-25 17:20:42,229 INFO L130 PetriNetUnfolder]: 862/1739 cut-off events. [2022-11-25 17:20:42,229 INFO L131 PetriNetUnfolder]: For 7013/7013 co-relation queries the response was YES. [2022-11-25 17:20:42,238 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9046 conditions, 1739 events. 862/1739 cut-off events. For 7013/7013 co-relation queries the response was YES. Maximal size of possible extension queue 163. Compared 11111 event pairs, 80 based on Foata normal form. 8/1710 useless extension candidates. Maximal degree in co-relation 8610. Up to 1035 conditions per place. [2022-11-25 17:20:42,247 INFO L137 encePairwiseOnDemand]: 259/271 looper letters, 233 selfloop transitions, 143 changer transitions 43/420 dead transitions. [2022-11-25 17:20:42,247 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 159 places, 420 transitions, 4915 flow [2022-11-25 17:20:42,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-11-25 17:20:42,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2022-11-25 17:20:42,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 2464 transitions. [2022-11-25 17:20:42,252 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.3030750307503075 [2022-11-25 17:20:42,252 INFO L72 ComplementDD]: Start complementDD. Operand 30 states and 2464 transitions. [2022-11-25 17:20:42,252 INFO L73 IsDeterministic]: Start isDeterministic. Operand 30 states and 2464 transitions. [2022-11-25 17:20:42,253 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:20:42,253 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 30 states and 2464 transitions. [2022-11-25 17:20:42,257 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 31 states, 30 states have (on average 82.13333333333334) internal successors, (2464), 30 states have internal predecessors, (2464), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:20:42,266 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 31 states, 31 states have (on average 271.0) internal successors, (8401), 31 states have internal predecessors, (8401), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:20:42,269 INFO L81 ComplementDD]: Finished complementDD. Result has 31 states, 31 states have (on average 271.0) internal successors, (8401), 31 states have internal predecessors, (8401), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:20:42,269 INFO L175 Difference]: Start difference. First operand has 130 places, 257 transitions, 2850 flow. Second operand 30 states and 2464 transitions. [2022-11-25 17:20:42,269 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 159 places, 420 transitions, 4915 flow [2022-11-25 17:20:42,339 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 158 places, 420 transitions, 4903 flow, removed 4 selfloop flow, removed 1 redundant places. [2022-11-25 17:20:42,346 INFO L231 Difference]: Finished difference. Result has 174 places, 315 transitions, 4010 flow [2022-11-25 17:20:42,347 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=271, PETRI_DIFFERENCE_MINUEND_FLOW=2832, PETRI_DIFFERENCE_MINUEND_PLACES=129, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=256, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=80, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=130, PETRI_DIFFERENCE_SUBTRAHEND_STATES=30, PETRI_FLOW=4010, PETRI_PLACES=174, PETRI_TRANSITIONS=315} [2022-11-25 17:20:42,348 INFO L288 CegarLoopForPetriNet]: 21 programPoint places, 153 predicate places. [2022-11-25 17:20:42,348 INFO L495 AbstractCegarLoop]: Abstraction has has 174 places, 315 transitions, 4010 flow [2022-11-25 17:20:42,349 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 78.58064516129032) internal successors, (2436), 31 states have internal predecessors, (2436), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:20:42,349 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:20:42,349 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:20:42,355 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff2a69db-f292-4098-8ca3-ff948148af61/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-25 17:20:42,555 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff2a69db-f292-4098-8ca3-ff948148af61/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:20:42,555 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-25 17:20:42,555 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:20:42,555 INFO L85 PathProgramCache]: Analyzing trace with hash -2051219672, now seen corresponding path program 4 times [2022-11-25 17:20:42,555 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:20:42,556 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1739189114] [2022-11-25 17:20:42,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:20:42,556 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:20:42,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:20:43,624 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:20:43,624 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:20:43,625 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1739189114] [2022-11-25 17:20:43,625 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1739189114] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:20:43,625 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [14405645] [2022-11-25 17:20:43,625 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-25 17:20:43,625 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:20:43,625 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff2a69db-f292-4098-8ca3-ff948148af61/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:20:43,628 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff2a69db-f292-4098-8ca3-ff948148af61/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:20:43,654 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff2a69db-f292-4098-8ca3-ff948148af61/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-25 17:20:43,750 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-25 17:20:43,750 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 17:20:43,752 INFO L263 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 48 conjunts are in the unsatisfiable core [2022-11-25 17:20:43,754 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:20:44,068 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 17:20:44,069 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2022-11-25 17:20:44,216 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 7 [2022-11-25 17:20:44,324 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:20:44,324 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:20:44,710 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 17:20:44,710 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 144 treesize of output 116 [2022-11-25 17:20:44,720 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 99 treesize of output 87 [2022-11-25 17:20:44,726 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 87 treesize of output 75 [2022-11-25 17:20:45,207 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:20:45,207 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [14405645] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:20:45,207 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 17:20:45,207 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 27 [2022-11-25 17:20:45,207 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1035386695] [2022-11-25 17:20:45,208 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 17:20:45,208 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-11-25 17:20:45,208 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:20:45,209 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-11-25 17:20:45,209 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=693, Unknown=2, NotChecked=0, Total=812 [2022-11-25 17:20:47,302 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 74 out of 271 [2022-11-25 17:20:47,317 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 174 places, 315 transitions, 4010 flow. Second operand has 29 states, 29 states have (on average 75.6896551724138) internal successors, (2195), 29 states have internal predecessors, (2195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:20:47,317 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:20:47,317 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 74 of 271 [2022-11-25 17:20:47,318 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:20:48,556 WARN L837 $PredicateComparison]: unable to prove that (let ((.cse3 (not (<= 0 c_~q_back~0))) (.cse4 (not (< c_~q_back~0 c_~n~0))) (.cse5 (< |c_thread1Thread1of1ForFork1_~i~0#1| c_~N~0)) (.cse1 (+ c_~N~0 1)) (.cse6 (+ (* c_~q_front~0 4) c_~q~0.offset))) (and (let ((.cse2 (select (select |c_#memory_int| c_~q~0.base) .cse6))) (or (let ((.cse0 (+ c_~s~0 .cse2))) (and (<= c_~N~0 .cse0) (< .cse0 .cse1))) .cse3 .cse4 (= .cse2 0) .cse5)) (or .cse3 .cse4 .cse5 (and (forall ((v_ArrVal_335 (Array Int Int))) (let ((.cse7 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_335) c_~q~0.base) .cse6))) (or (= .cse7 0) (< (+ c_~s~0 .cse7) .cse1)))) (forall ((v_ArrVal_335 (Array Int Int))) (let ((.cse8 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_335) c_~q~0.base) .cse6))) (or (= .cse8 0) (<= c_~N~0 (+ c_~s~0 .cse8))))))))) is different from false [2022-11-25 17:20:52,016 WARN L837 $PredicateComparison]: unable to prove that (let ((.cse6 (+ (* c_~q_front~0 4) c_~q~0.offset)) (.cse3 (not (<= 0 c_~q_back~0))) (.cse1 (+ c_~N~0 1)) (.cse4 (not (< c_~q_back~0 c_~n~0))) (.cse5 (< |c_thread1Thread1of1ForFork1_~i~0#1| c_~N~0))) (and (let ((.cse2 (select (select |c_#memory_int| c_~q~0.base) .cse6))) (or (let ((.cse0 (+ c_~s~0 .cse2))) (and (<= c_~N~0 .cse0) (< .cse0 .cse1))) .cse3 .cse4 (= .cse2 0) .cse5)) (or .cse3 .cse4 .cse5 (and (forall ((v_ArrVal_335 (Array Int Int))) (let ((.cse7 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_335) c_~q~0.base) .cse6))) (or (= .cse7 0) (< (+ c_~s~0 .cse7) .cse1)))) (forall ((v_ArrVal_335 (Array Int Int))) (let ((.cse8 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_335) c_~q~0.base) .cse6))) (or (= .cse8 0) (<= c_~N~0 (+ c_~s~0 .cse8))))))) (or .cse3 (and (<= c_~N~0 c_~s~0) (< c_~s~0 .cse1)) .cse4 .cse5))) is different from false [2022-11-25 17:20:54,279 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-25 17:20:55,099 INFO L130 PetriNetUnfolder]: 945/1923 cut-off events. [2022-11-25 17:20:55,100 INFO L131 PetriNetUnfolder]: For 11614/11614 co-relation queries the response was YES. [2022-11-25 17:20:55,116 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11519 conditions, 1923 events. 945/1923 cut-off events. For 11614/11614 co-relation queries the response was YES. Maximal size of possible extension queue 178. Compared 12635 event pairs, 60 based on Foata normal form. 13/1899 useless extension candidates. Maximal degree in co-relation 11317. Up to 959 conditions per place. [2022-11-25 17:20:55,130 INFO L137 encePairwiseOnDemand]: 257/271 looper letters, 224 selfloop transitions, 202 changer transitions 35/462 dead transitions. [2022-11-25 17:20:55,130 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 200 places, 462 transitions, 6149 flow [2022-11-25 17:20:55,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-11-25 17:20:55,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2022-11-25 17:20:55,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 2536 transitions. [2022-11-25 17:20:55,135 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.2924354243542435 [2022-11-25 17:20:55,135 INFO L72 ComplementDD]: Start complementDD. Operand 32 states and 2536 transitions. [2022-11-25 17:20:55,135 INFO L73 IsDeterministic]: Start isDeterministic. Operand 32 states and 2536 transitions. [2022-11-25 17:20:55,136 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:20:55,136 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 32 states and 2536 transitions. [2022-11-25 17:20:55,141 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 33 states, 32 states have (on average 79.25) internal successors, (2536), 32 states have internal predecessors, (2536), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:20:55,152 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 33 states, 33 states have (on average 271.0) internal successors, (8943), 33 states have internal predecessors, (8943), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:20:55,154 INFO L81 ComplementDD]: Finished complementDD. Result has 33 states, 33 states have (on average 271.0) internal successors, (8943), 33 states have internal predecessors, (8943), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:20:55,155 INFO L175 Difference]: Start difference. First operand has 174 places, 315 transitions, 4010 flow. Second operand 32 states and 2536 transitions. [2022-11-25 17:20:55,155 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 200 places, 462 transitions, 6149 flow [2022-11-25 17:20:55,296 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 180 places, 462 transitions, 5883 flow, removed 99 selfloop flow, removed 20 redundant places. [2022-11-25 17:20:55,304 INFO L231 Difference]: Finished difference. Result has 193 places, 358 transitions, 4975 flow [2022-11-25 17:20:55,305 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=271, PETRI_DIFFERENCE_MINUEND_FLOW=3806, PETRI_DIFFERENCE_MINUEND_PLACES=149, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=315, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=157, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=130, PETRI_DIFFERENCE_SUBTRAHEND_STATES=32, PETRI_FLOW=4975, PETRI_PLACES=193, PETRI_TRANSITIONS=358} [2022-11-25 17:20:55,305 INFO L288 CegarLoopForPetriNet]: 21 programPoint places, 172 predicate places. [2022-11-25 17:20:55,306 INFO L495 AbstractCegarLoop]: Abstraction has has 193 places, 358 transitions, 4975 flow [2022-11-25 17:20:55,306 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 75.6896551724138) internal successors, (2195), 29 states have internal predecessors, (2195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:20:55,307 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:20:55,307 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:20:55,319 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff2a69db-f292-4098-8ca3-ff948148af61/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-25 17:20:55,512 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff2a69db-f292-4098-8ca3-ff948148af61/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:20:55,512 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-25 17:20:55,513 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:20:55,513 INFO L85 PathProgramCache]: Analyzing trace with hash 759956026, now seen corresponding path program 5 times [2022-11-25 17:20:55,513 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:20:55,513 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [276491119] [2022-11-25 17:20:55,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:20:55,513 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:20:55,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:20:55,675 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-25 17:20:55,675 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:20:55,676 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [276491119] [2022-11-25 17:20:55,676 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [276491119] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:20:55,676 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1372394366] [2022-11-25 17:20:55,676 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-25 17:20:55,676 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:20:55,676 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff2a69db-f292-4098-8ca3-ff948148af61/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:20:55,677 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff2a69db-f292-4098-8ca3-ff948148af61/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:20:55,717 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff2a69db-f292-4098-8ca3-ff948148af61/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-25 17:20:55,801 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-25 17:20:55,801 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 17:20:55,803 INFO L263 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-25 17:20:55,805 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:20:55,925 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-25 17:20:55,925 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:20:56,054 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-25 17:20:56,055 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1372394366] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:20:56,055 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 17:20:56,055 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 17 [2022-11-25 17:20:56,055 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1447803375] [2022-11-25 17:20:56,056 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 17:20:56,056 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-25 17:20:56,057 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:20:56,057 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-25 17:20:56,058 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=222, Unknown=0, NotChecked=0, Total=306 [2022-11-25 17:20:56,257 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 110 out of 271 [2022-11-25 17:20:56,259 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 193 places, 358 transitions, 4975 flow. Second operand has 18 states, 18 states have (on average 111.72222222222223) internal successors, (2011), 18 states have internal predecessors, (2011), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:20:56,259 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:20:56,259 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 110 of 271 [2022-11-25 17:20:56,259 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:20:56,636 INFO L130 PetriNetUnfolder]: 245/537 cut-off events. [2022-11-25 17:20:56,636 INFO L131 PetriNetUnfolder]: For 6136/6144 co-relation queries the response was YES. [2022-11-25 17:20:56,639 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3790 conditions, 537 events. 245/537 cut-off events. For 6136/6144 co-relation queries the response was YES. Maximal size of possible extension queue 52. Compared 2759 event pairs, 71 based on Foata normal form. 92/618 useless extension candidates. Maximal degree in co-relation 3727. Up to 401 conditions per place. [2022-11-25 17:20:56,643 INFO L137 encePairwiseOnDemand]: 266/271 looper letters, 92 selfloop transitions, 4 changer transitions 40/139 dead transitions. [2022-11-25 17:20:56,643 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 164 places, 139 transitions, 2092 flow [2022-11-25 17:20:56,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-25 17:20:56,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2022-11-25 17:20:56,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 916 transitions. [2022-11-25 17:20:56,646 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4225092250922509 [2022-11-25 17:20:56,646 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 916 transitions. [2022-11-25 17:20:56,646 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 916 transitions. [2022-11-25 17:20:56,647 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:20:56,647 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 916 transitions. [2022-11-25 17:20:56,648 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 114.5) internal successors, (916), 8 states have internal predecessors, (916), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:20:56,650 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 271.0) internal successors, (2439), 9 states have internal predecessors, (2439), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:20:56,651 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 271.0) internal successors, (2439), 9 states have internal predecessors, (2439), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:20:56,651 INFO L175 Difference]: Start difference. First operand has 193 places, 358 transitions, 4975 flow. Second operand 8 states and 916 transitions. [2022-11-25 17:20:56,651 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 164 places, 139 transitions, 2092 flow [2022-11-25 17:20:56,674 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 118 places, 139 transitions, 1744 flow, removed 40 selfloop flow, removed 46 redundant places. [2022-11-25 17:20:56,676 INFO L231 Difference]: Finished difference. Result has 118 places, 99 transitions, 1096 flow [2022-11-25 17:20:56,677 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=271, PETRI_DIFFERENCE_MINUEND_FLOW=1416, PETRI_DIFFERENCE_MINUEND_PLACES=111, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=129, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=125, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1096, PETRI_PLACES=118, PETRI_TRANSITIONS=99} [2022-11-25 17:20:56,677 INFO L288 CegarLoopForPetriNet]: 21 programPoint places, 97 predicate places. [2022-11-25 17:20:56,678 INFO L495 AbstractCegarLoop]: Abstraction has has 118 places, 99 transitions, 1096 flow [2022-11-25 17:20:56,678 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 111.72222222222223) internal successors, (2011), 18 states have internal predecessors, (2011), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:20:56,679 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:20:56,679 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:20:56,685 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff2a69db-f292-4098-8ca3-ff948148af61/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-11-25 17:20:56,884 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff2a69db-f292-4098-8ca3-ff948148af61/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:20:56,885 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-25 17:20:56,885 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:20:56,885 INFO L85 PathProgramCache]: Analyzing trace with hash 744533751, now seen corresponding path program 5 times [2022-11-25 17:20:56,885 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:20:56,885 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [186892356] [2022-11-25 17:20:56,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:20:56,886 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:20:56,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:20:57,386 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:20:57,386 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:20:57,386 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [186892356] [2022-11-25 17:20:57,386 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [186892356] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:20:57,386 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [37697157] [2022-11-25 17:20:57,387 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-25 17:20:57,387 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:20:57,387 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff2a69db-f292-4098-8ca3-ff948148af61/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:20:57,388 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff2a69db-f292-4098-8ca3-ff948148af61/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:20:57,408 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff2a69db-f292-4098-8ca3-ff948148af61/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-25 17:20:57,503 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-11-25 17:20:57,503 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 17:20:57,504 INFO L263 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 33 conjunts are in the unsatisfiable core [2022-11-25 17:20:57,506 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:20:57,764 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-25 17:20:57,764 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:20:57,894 INFO L321 Elim1Store]: treesize reduction 5, result has 58.3 percent of original size [2022-11-25 17:20:57,895 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 16 [2022-11-25 17:20:58,120 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:20:58,120 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [37697157] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:20:58,121 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 17:20:58,121 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 9] total 23 [2022-11-25 17:20:58,121 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [866507623] [2022-11-25 17:20:58,121 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 17:20:58,121 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-11-25 17:20:58,121 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:20:58,122 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-11-25 17:20:58,122 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=399, Unknown=0, NotChecked=0, Total=552 [2022-11-25 17:20:58,746 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 102 out of 271 [2022-11-25 17:20:58,748 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 118 places, 99 transitions, 1096 flow. Second operand has 24 states, 24 states have (on average 103.79166666666667) internal successors, (2491), 24 states have internal predecessors, (2491), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:20:58,748 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:20:58,748 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 102 of 271 [2022-11-25 17:20:58,748 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:20:59,514 INFO L130 PetriNetUnfolder]: 367/774 cut-off events. [2022-11-25 17:20:59,515 INFO L131 PetriNetUnfolder]: For 5052/5058 co-relation queries the response was YES. [2022-11-25 17:20:59,518 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4340 conditions, 774 events. 367/774 cut-off events. For 5052/5058 co-relation queries the response was YES. Maximal size of possible extension queue 68. Compared 4234 event pairs, 46 based on Foata normal form. 50/808 useless extension candidates. Maximal degree in co-relation 4301. Up to 333 conditions per place. [2022-11-25 17:20:59,524 INFO L137 encePairwiseOnDemand]: 263/271 looper letters, 152 selfloop transitions, 60 changer transitions 12/227 dead transitions. [2022-11-25 17:20:59,524 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 111 places, 227 transitions, 2687 flow [2022-11-25 17:20:59,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-11-25 17:20:59,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2022-11-25 17:20:59,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 2053 transitions. [2022-11-25 17:20:59,528 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.39871819770829287 [2022-11-25 17:20:59,528 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 2053 transitions. [2022-11-25 17:20:59,528 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 2053 transitions. [2022-11-25 17:20:59,529 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:20:59,529 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 2053 transitions. [2022-11-25 17:20:59,532 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 108.05263157894737) internal successors, (2053), 19 states have internal predecessors, (2053), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:20:59,538 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 271.0) internal successors, (5420), 20 states have internal predecessors, (5420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:20:59,539 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 271.0) internal successors, (5420), 20 states have internal predecessors, (5420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:20:59,539 INFO L175 Difference]: Start difference. First operand has 118 places, 99 transitions, 1096 flow. Second operand 19 states and 2053 transitions. [2022-11-25 17:20:59,539 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 111 places, 227 transitions, 2687 flow [2022-11-25 17:20:59,562 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 100 places, 227 transitions, 2598 flow, removed 10 selfloop flow, removed 11 redundant places. [2022-11-25 17:20:59,565 INFO L231 Difference]: Finished difference. Result has 111 places, 136 transitions, 1864 flow [2022-11-25 17:20:59,566 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=271, PETRI_DIFFERENCE_MINUEND_FLOW=1026, PETRI_DIFFERENCE_MINUEND_PLACES=82, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=97, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=1864, PETRI_PLACES=111, PETRI_TRANSITIONS=136} [2022-11-25 17:20:59,566 INFO L288 CegarLoopForPetriNet]: 21 programPoint places, 90 predicate places. [2022-11-25 17:20:59,566 INFO L495 AbstractCegarLoop]: Abstraction has has 111 places, 136 transitions, 1864 flow [2022-11-25 17:20:59,567 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 103.79166666666667) internal successors, (2491), 24 states have internal predecessors, (2491), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:20:59,567 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:20:59,567 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:20:59,580 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff2a69db-f292-4098-8ca3-ff948148af61/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-11-25 17:20:59,773 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff2a69db-f292-4098-8ca3-ff948148af61/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-11-25 17:20:59,773 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-25 17:20:59,774 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:20:59,774 INFO L85 PathProgramCache]: Analyzing trace with hash 1437174186, now seen corresponding path program 6 times [2022-11-25 17:20:59,774 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:20:59,774 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [414159507] [2022-11-25 17:20:59,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:20:59,774 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:20:59,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:21:01,163 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:21:01,163 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:21:01,163 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [414159507] [2022-11-25 17:21:01,163 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [414159507] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:21:01,163 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1879326570] [2022-11-25 17:21:01,163 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-25 17:21:01,163 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:21:01,164 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff2a69db-f292-4098-8ca3-ff948148af61/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:21:01,168 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff2a69db-f292-4098-8ca3-ff948148af61/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:21:01,187 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff2a69db-f292-4098-8ca3-ff948148af61/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-11-25 17:21:01,373 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-11-25 17:21:01,374 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 17:21:01,376 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 41 conjunts are in the unsatisfiable core [2022-11-25 17:21:01,377 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:21:01,688 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 17:21:01,689 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2022-11-25 17:21:01,786 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 7 [2022-11-25 17:21:01,866 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-25 17:21:01,866 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:21:02,026 WARN L837 $PredicateComparison]: unable to prove that (let ((.cse1 (+ (* c_~q_front~0 4) c_~q~0.offset))) (and (forall ((v_ArrVal_446 (Array Int Int))) (let ((.cse0 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_446) c_~q~0.base) .cse1))) (or (< (+ c_~s~0 .cse0) (+ c_~N~0 1)) (= .cse0 0)))) (forall ((v_ArrVal_446 (Array Int Int))) (let ((.cse2 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_446) c_~q~0.base) .cse1))) (or (<= c_~N~0 (+ c_~s~0 .cse2)) (= .cse2 0)))))) is different from false [2022-11-25 17:21:02,156 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 17:21:02,157 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 144 treesize of output 116 [2022-11-25 17:21:02,171 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 99 treesize of output 87 [2022-11-25 17:21:02,182 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 87 treesize of output 75 [2022-11-25 17:21:02,494 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-25 17:21:02,494 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1879326570] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:21:02,494 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 17:21:02,494 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8, 7] total 25 [2022-11-25 17:21:02,494 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1489467118] [2022-11-25 17:21:02,495 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 17:21:02,495 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-11-25 17:21:02,495 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:21:02,495 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-11-25 17:21:02,496 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=578, Unknown=1, NotChecked=48, Total=702 [2022-11-25 17:21:02,904 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 77 out of 271 [2022-11-25 17:21:02,905 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 111 places, 136 transitions, 1864 flow. Second operand has 27 states, 27 states have (on average 78.81481481481481) internal successors, (2128), 27 states have internal predecessors, (2128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:21:02,905 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:21:02,905 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 77 of 271 [2022-11-25 17:21:02,905 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:21:04,411 INFO L130 PetriNetUnfolder]: 372/788 cut-off events. [2022-11-25 17:21:04,411 INFO L131 PetriNetUnfolder]: For 7122/7122 co-relation queries the response was YES. [2022-11-25 17:21:04,415 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5141 conditions, 788 events. 372/788 cut-off events. For 7122/7122 co-relation queries the response was YES. Maximal size of possible extension queue 70. Compared 4317 event pairs, 28 based on Foata normal form. 6/791 useless extension candidates. Maximal degree in co-relation 5094. Up to 536 conditions per place. [2022-11-25 17:21:04,419 INFO L137 encePairwiseOnDemand]: 262/271 looper letters, 114 selfloop transitions, 64 changer transitions 4/183 dead transitions. [2022-11-25 17:21:04,419 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 125 places, 183 transitions, 2563 flow [2022-11-25 17:21:04,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-11-25 17:21:04,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2022-11-25 17:21:04,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 1308 transitions. [2022-11-25 17:21:04,431 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.3016605166051661 [2022-11-25 17:21:04,431 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 1308 transitions. [2022-11-25 17:21:04,431 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 1308 transitions. [2022-11-25 17:21:04,431 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:21:04,432 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 1308 transitions. [2022-11-25 17:21:04,434 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 81.75) internal successors, (1308), 16 states have internal predecessors, (1308), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:21:04,438 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 271.0) internal successors, (4607), 17 states have internal predecessors, (4607), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:21:04,439 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 271.0) internal successors, (4607), 17 states have internal predecessors, (4607), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:21:04,439 INFO L175 Difference]: Start difference. First operand has 111 places, 136 transitions, 1864 flow. Second operand 16 states and 1308 transitions. [2022-11-25 17:21:04,439 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 125 places, 183 transitions, 2563 flow [2022-11-25 17:21:04,474 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 117 places, 183 transitions, 2413 flow, removed 56 selfloop flow, removed 8 redundant places. [2022-11-25 17:21:04,477 INFO L231 Difference]: Finished difference. Result has 121 places, 147 transitions, 2055 flow [2022-11-25 17:21:04,477 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=271, PETRI_DIFFERENCE_MINUEND_FLOW=1720, PETRI_DIFFERENCE_MINUEND_PLACES=102, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=136, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=80, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=2055, PETRI_PLACES=121, PETRI_TRANSITIONS=147} [2022-11-25 17:21:04,478 INFO L288 CegarLoopForPetriNet]: 21 programPoint places, 100 predicate places. [2022-11-25 17:21:04,479 INFO L495 AbstractCegarLoop]: Abstraction has has 121 places, 147 transitions, 2055 flow [2022-11-25 17:21:04,479 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 78.81481481481481) internal successors, (2128), 27 states have internal predecessors, (2128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:21:04,479 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:21:04,479 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:21:04,490 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff2a69db-f292-4098-8ca3-ff948148af61/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-11-25 17:21:04,685 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff2a69db-f292-4098-8ca3-ff948148af61/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-11-25 17:21:04,685 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-25 17:21:04,685 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:21:04,685 INFO L85 PathProgramCache]: Analyzing trace with hash 278282793, now seen corresponding path program 7 times [2022-11-25 17:21:04,685 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:21:04,686 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1434203450] [2022-11-25 17:21:04,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:21:04,686 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:21:04,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:21:04,824 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-25 17:21:04,824 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:21:04,824 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1434203450] [2022-11-25 17:21:04,825 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1434203450] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:21:04,825 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1833060771] [2022-11-25 17:21:04,825 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-25 17:21:04,825 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:21:04,825 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff2a69db-f292-4098-8ca3-ff948148af61/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:21:04,826 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff2a69db-f292-4098-8ca3-ff948148af61/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:21:04,855 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff2a69db-f292-4098-8ca3-ff948148af61/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-11-25 17:21:04,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:21:04,948 INFO L263 TraceCheckSpWp]: Trace formula consists of 236 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-25 17:21:04,950 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:21:04,991 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-25 17:21:04,992 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:21:05,152 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-25 17:21:05,153 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1833060771] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:21:05,153 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 17:21:05,153 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 6] total 9 [2022-11-25 17:21:05,153 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [22093464] [2022-11-25 17:21:05,153 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 17:21:05,153 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-25 17:21:05,153 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:21:05,154 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-25 17:21:05,154 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2022-11-25 17:21:05,161 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 116 out of 271 [2022-11-25 17:21:05,161 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 121 places, 147 transitions, 2055 flow. Second operand has 10 states, 10 states have (on average 119.0) internal successors, (1190), 10 states have internal predecessors, (1190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:21:05,162 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:21:05,162 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 116 of 271 [2022-11-25 17:21:05,162 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:21:05,556 INFO L130 PetriNetUnfolder]: 506/1071 cut-off events. [2022-11-25 17:21:05,556 INFO L131 PetriNetUnfolder]: For 10228/10240 co-relation queries the response was YES. [2022-11-25 17:21:05,562 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6965 conditions, 1071 events. 506/1071 cut-off events. For 10228/10240 co-relation queries the response was YES. Maximal size of possible extension queue 96. Compared 6364 event pairs, 35 based on Foata normal form. 34/1096 useless extension candidates. Maximal degree in co-relation 6916. Up to 463 conditions per place. [2022-11-25 17:21:05,567 INFO L137 encePairwiseOnDemand]: 266/271 looper letters, 81 selfloop transitions, 84 changer transitions 34/203 dead transitions. [2022-11-25 17:21:05,567 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 125 places, 203 transitions, 3009 flow [2022-11-25 17:21:05,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-25 17:21:05,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-11-25 17:21:05,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 628 transitions. [2022-11-25 17:21:05,571 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.46346863468634686 [2022-11-25 17:21:05,571 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 628 transitions. [2022-11-25 17:21:05,571 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 628 transitions. [2022-11-25 17:21:05,571 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:21:05,572 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 628 transitions. [2022-11-25 17:21:05,573 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 125.6) internal successors, (628), 5 states have internal predecessors, (628), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:21:05,574 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 271.0) internal successors, (1626), 6 states have internal predecessors, (1626), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:21:05,575 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 271.0) internal successors, (1626), 6 states have internal predecessors, (1626), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:21:05,575 INFO L175 Difference]: Start difference. First operand has 121 places, 147 transitions, 2055 flow. Second operand 5 states and 628 transitions. [2022-11-25 17:21:05,575 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 125 places, 203 transitions, 3009 flow [2022-11-25 17:21:05,615 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 118 places, 203 transitions, 2941 flow, removed 24 selfloop flow, removed 7 redundant places. [2022-11-25 17:21:05,619 INFO L231 Difference]: Finished difference. Result has 120 places, 148 transitions, 2195 flow [2022-11-25 17:21:05,619 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=271, PETRI_DIFFERENCE_MINUEND_FLOW=1987, PETRI_DIFFERENCE_MINUEND_PLACES=114, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=147, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=2195, PETRI_PLACES=120, PETRI_TRANSITIONS=148} [2022-11-25 17:21:05,620 INFO L288 CegarLoopForPetriNet]: 21 programPoint places, 99 predicate places. [2022-11-25 17:21:05,620 INFO L495 AbstractCegarLoop]: Abstraction has has 120 places, 148 transitions, 2195 flow [2022-11-25 17:21:05,621 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 119.0) internal successors, (1190), 10 states have internal predecessors, (1190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:21:05,621 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:21:05,622 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:21:05,632 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff2a69db-f292-4098-8ca3-ff948148af61/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-11-25 17:21:05,827 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff2a69db-f292-4098-8ca3-ff948148af61/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-11-25 17:21:05,827 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-25 17:21:05,828 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:21:05,828 INFO L85 PathProgramCache]: Analyzing trace with hash 119438164, now seen corresponding path program 8 times [2022-11-25 17:21:05,828 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:21:05,828 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1001646723] [2022-11-25 17:21:05,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:21:05,828 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:21:05,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:21:06,583 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:21:06,584 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:21:06,584 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1001646723] [2022-11-25 17:21:06,584 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1001646723] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:21:06,584 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1750294838] [2022-11-25 17:21:06,584 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-25 17:21:06,584 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:21:06,585 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff2a69db-f292-4098-8ca3-ff948148af61/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:21:06,586 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff2a69db-f292-4098-8ca3-ff948148af61/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:21:06,607 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff2a69db-f292-4098-8ca3-ff948148af61/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-11-25 17:21:06,715 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-25 17:21:06,715 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 17:21:06,717 INFO L263 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 28 conjunts are in the unsatisfiable core [2022-11-25 17:21:06,718 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:21:07,200 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:21:07,201 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:21:07,332 INFO L321 Elim1Store]: treesize reduction 5, result has 64.3 percent of original size [2022-11-25 17:21:07,333 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 18 [2022-11-25 17:21:07,853 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:21:07,853 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1750294838] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:21:07,853 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 17:21:07,854 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 29 [2022-11-25 17:21:07,854 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1785414477] [2022-11-25 17:21:07,854 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 17:21:07,854 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-11-25 17:21:07,854 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:21:07,855 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-11-25 17:21:07,855 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=747, Unknown=0, NotChecked=0, Total=870 [2022-11-25 17:21:09,657 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 97 out of 271 [2022-11-25 17:21:09,659 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 120 places, 148 transitions, 2195 flow. Second operand has 30 states, 30 states have (on average 98.76666666666667) internal successors, (2963), 30 states have internal predecessors, (2963), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:21:09,659 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:21:09,660 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 97 of 271 [2022-11-25 17:21:09,660 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:21:13,897 INFO L130 PetriNetUnfolder]: 808/1677 cut-off events. [2022-11-25 17:21:13,898 INFO L131 PetriNetUnfolder]: For 17176/17176 co-relation queries the response was YES. [2022-11-25 17:21:13,905 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12498 conditions, 1677 events. 808/1677 cut-off events. For 17176/17176 co-relation queries the response was YES. Maximal size of possible extension queue 129. Compared 10523 event pairs, 97 based on Foata normal form. 88/1759 useless extension candidates. Maximal degree in co-relation 12446. Up to 889 conditions per place. [2022-11-25 17:21:13,912 INFO L137 encePairwiseOnDemand]: 261/271 looper letters, 239 selfloop transitions, 143 changer transitions 0/383 dead transitions. [2022-11-25 17:21:13,912 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 149 places, 383 transitions, 5681 flow [2022-11-25 17:21:13,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-11-25 17:21:13,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2022-11-25 17:21:13,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 3831 transitions. [2022-11-25 17:21:13,918 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.3820684152787474 [2022-11-25 17:21:13,918 INFO L72 ComplementDD]: Start complementDD. Operand 37 states and 3831 transitions. [2022-11-25 17:21:13,918 INFO L73 IsDeterministic]: Start isDeterministic. Operand 37 states and 3831 transitions. [2022-11-25 17:21:13,919 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:21:13,920 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 37 states and 3831 transitions. [2022-11-25 17:21:13,925 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 38 states, 37 states have (on average 103.54054054054055) internal successors, (3831), 37 states have internal predecessors, (3831), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:21:13,933 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 38 states, 38 states have (on average 271.0) internal successors, (10298), 38 states have internal predecessors, (10298), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:21:13,935 INFO L81 ComplementDD]: Finished complementDD. Result has 38 states, 38 states have (on average 271.0) internal successors, (10298), 38 states have internal predecessors, (10298), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:21:13,936 INFO L175 Difference]: Start difference. First operand has 120 places, 148 transitions, 2195 flow. Second operand 37 states and 3831 transitions. [2022-11-25 17:21:13,936 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 149 places, 383 transitions, 5681 flow [2022-11-25 17:21:14,012 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 139 places, 383 transitions, 4891 flow, removed 366 selfloop flow, removed 10 redundant places. [2022-11-25 17:21:14,019 INFO L231 Difference]: Finished difference. Result has 147 places, 263 transitions, 4172 flow [2022-11-25 17:21:14,019 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=271, PETRI_DIFFERENCE_MINUEND_FLOW=1961, PETRI_DIFFERENCE_MINUEND_PLACES=103, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=148, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=80, PETRI_DIFFERENCE_SUBTRAHEND_STATES=37, PETRI_FLOW=4172, PETRI_PLACES=147, PETRI_TRANSITIONS=263} [2022-11-25 17:21:14,019 INFO L288 CegarLoopForPetriNet]: 21 programPoint places, 126 predicate places. [2022-11-25 17:21:14,020 INFO L495 AbstractCegarLoop]: Abstraction has has 147 places, 263 transitions, 4172 flow [2022-11-25 17:21:14,020 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 98.76666666666667) internal successors, (2963), 30 states have internal predecessors, (2963), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:21:14,020 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:21:14,021 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:21:14,036 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff2a69db-f292-4098-8ca3-ff948148af61/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-11-25 17:21:14,235 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff2a69db-f292-4098-8ca3-ff948148af61/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-11-25 17:21:14,236 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-25 17:21:14,236 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:21:14,236 INFO L85 PathProgramCache]: Analyzing trace with hash -1451226638, now seen corresponding path program 9 times [2022-11-25 17:21:14,236 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:21:14,236 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [953233392] [2022-11-25 17:21:14,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:21:14,236 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:21:14,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:21:14,815 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:21:14,815 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:21:14,815 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [953233392] [2022-11-25 17:21:14,815 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [953233392] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:21:14,816 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1181241681] [2022-11-25 17:21:14,816 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-25 17:21:14,816 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:21:14,816 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff2a69db-f292-4098-8ca3-ff948148af61/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:21:14,817 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff2a69db-f292-4098-8ca3-ff948148af61/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:21:14,835 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff2a69db-f292-4098-8ca3-ff948148af61/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-11-25 17:21:15,030 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-25 17:21:15,030 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 17:21:15,032 INFO L263 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-25 17:21:15,033 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:21:15,204 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-25 17:21:15,204 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:21:15,310 INFO L321 Elim1Store]: treesize reduction 5, result has 58.3 percent of original size [2022-11-25 17:21:15,310 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 16 [2022-11-25 17:21:15,409 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-25 17:21:15,409 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1181241681] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:21:15,409 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 17:21:15,409 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 5, 5] total 18 [2022-11-25 17:21:15,409 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1318943879] [2022-11-25 17:21:15,409 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 17:21:15,410 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-11-25 17:21:15,410 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:21:15,410 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-11-25 17:21:15,410 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=280, Unknown=0, NotChecked=0, Total=342 [2022-11-25 17:21:16,172 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 104 out of 271 [2022-11-25 17:21:16,174 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 147 places, 263 transitions, 4172 flow. Second operand has 19 states, 19 states have (on average 106.15789473684211) internal successors, (2017), 19 states have internal predecessors, (2017), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:21:16,174 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:21:16,174 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 104 of 271 [2022-11-25 17:21:16,174 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:21:17,636 INFO L130 PetriNetUnfolder]: 617/1272 cut-off events. [2022-11-25 17:21:17,636 INFO L131 PetriNetUnfolder]: For 11615/11623 co-relation queries the response was YES. [2022-11-25 17:21:17,641 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8897 conditions, 1272 events. 617/1272 cut-off events. For 11615/11623 co-relation queries the response was YES. Maximal size of possible extension queue 101. Compared 7654 event pairs, 95 based on Foata normal form. 92/1348 useless extension candidates. Maximal degree in co-relation 8845. Up to 661 conditions per place. [2022-11-25 17:21:17,648 INFO L137 encePairwiseOnDemand]: 263/271 looper letters, 153 selfloop transitions, 135 changer transitions 16/308 dead transitions. [2022-11-25 17:21:17,648 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 161 places, 308 transitions, 4779 flow [2022-11-25 17:21:17,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-11-25 17:21:17,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2022-11-25 17:21:17,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 2841 transitions. [2022-11-25 17:21:17,653 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4032074936133977 [2022-11-25 17:21:17,653 INFO L72 ComplementDD]: Start complementDD. Operand 26 states and 2841 transitions. [2022-11-25 17:21:17,653 INFO L73 IsDeterministic]: Start isDeterministic. Operand 26 states and 2841 transitions. [2022-11-25 17:21:17,654 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:21:17,654 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 26 states and 2841 transitions. [2022-11-25 17:21:17,659 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 27 states, 26 states have (on average 109.26923076923077) internal successors, (2841), 26 states have internal predecessors, (2841), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:21:17,665 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 27 states, 27 states have (on average 271.0) internal successors, (7317), 27 states have internal predecessors, (7317), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:21:17,666 INFO L81 ComplementDD]: Finished complementDD. Result has 27 states, 27 states have (on average 271.0) internal successors, (7317), 27 states have internal predecessors, (7317), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:21:17,666 INFO L175 Difference]: Start difference. First operand has 147 places, 263 transitions, 4172 flow. Second operand 26 states and 2841 transitions. [2022-11-25 17:21:17,666 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 161 places, 308 transitions, 4779 flow [2022-11-25 17:21:17,722 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 154 places, 308 transitions, 3997 flow, removed 332 selfloop flow, removed 7 redundant places. [2022-11-25 17:21:17,728 INFO L231 Difference]: Finished difference. Result has 161 places, 225 transitions, 3328 flow [2022-11-25 17:21:17,728 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=271, PETRI_DIFFERENCE_MINUEND_FLOW=2545, PETRI_DIFFERENCE_MINUEND_PLACES=129, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=205, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=115, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=78, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=3328, PETRI_PLACES=161, PETRI_TRANSITIONS=225} [2022-11-25 17:21:17,729 INFO L288 CegarLoopForPetriNet]: 21 programPoint places, 140 predicate places. [2022-11-25 17:21:17,729 INFO L495 AbstractCegarLoop]: Abstraction has has 161 places, 225 transitions, 3328 flow [2022-11-25 17:21:17,729 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 106.15789473684211) internal successors, (2017), 19 states have internal predecessors, (2017), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:21:17,730 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:21:17,730 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:21:17,736 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff2a69db-f292-4098-8ca3-ff948148af61/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2022-11-25 17:21:17,936 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff2a69db-f292-4098-8ca3-ff948148af61/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-11-25 17:21:17,936 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-25 17:21:17,936 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:21:17,936 INFO L85 PathProgramCache]: Analyzing trace with hash 1812576320, now seen corresponding path program 10 times [2022-11-25 17:21:17,937 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:21:17,937 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [605436083] [2022-11-25 17:21:17,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:21:17,937 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:21:17,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:21:18,524 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:21:18,524 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:21:18,524 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [605436083] [2022-11-25 17:21:18,524 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [605436083] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:21:18,525 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1369995927] [2022-11-25 17:21:18,525 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-25 17:21:18,525 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:21:18,525 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff2a69db-f292-4098-8ca3-ff948148af61/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:21:18,526 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff2a69db-f292-4098-8ca3-ff948148af61/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:21:18,532 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff2a69db-f292-4098-8ca3-ff948148af61/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-11-25 17:21:18,667 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-25 17:21:18,667 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 17:21:18,669 INFO L263 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 25 conjunts are in the unsatisfiable core [2022-11-25 17:21:18,670 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:21:18,825 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-25 17:21:18,825 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:21:18,873 INFO L321 Elim1Store]: treesize reduction 5, result has 58.3 percent of original size [2022-11-25 17:21:18,873 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 16 [2022-11-25 17:21:18,947 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-25 17:21:18,947 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1369995927] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:21:18,947 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 17:21:18,947 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 6, 4] total 16 [2022-11-25 17:21:18,948 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [863437955] [2022-11-25 17:21:18,948 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 17:21:18,948 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-11-25 17:21:18,948 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:21:18,948 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-11-25 17:21:18,948 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2022-11-25 17:21:19,672 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 104 out of 271 [2022-11-25 17:21:19,673 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 161 places, 225 transitions, 3328 flow. Second operand has 17 states, 17 states have (on average 106.23529411764706) internal successors, (1806), 17 states have internal predecessors, (1806), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:21:19,674 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:21:19,674 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 104 of 271 [2022-11-25 17:21:19,674 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:21:20,945 INFO L130 PetriNetUnfolder]: 691/1364 cut-off events. [2022-11-25 17:21:20,945 INFO L131 PetriNetUnfolder]: For 12369/12375 co-relation queries the response was YES. [2022-11-25 17:21:20,951 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9001 conditions, 1364 events. 691/1364 cut-off events. For 12369/12375 co-relation queries the response was YES. Maximal size of possible extension queue 104. Compared 7931 event pairs, 61 based on Foata normal form. 46/1399 useless extension candidates. Maximal degree in co-relation 8943. Up to 844 conditions per place. [2022-11-25 17:21:20,959 INFO L137 encePairwiseOnDemand]: 263/271 looper letters, 196 selfloop transitions, 123 changer transitions 0/323 dead transitions. [2022-11-25 17:21:20,959 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 177 places, 323 transitions, 4684 flow [2022-11-25 17:21:20,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-11-25 17:21:20,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2022-11-25 17:21:20,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 2405 transitions. [2022-11-25 17:21:20,963 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4033881247903388 [2022-11-25 17:21:20,964 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 2405 transitions. [2022-11-25 17:21:20,964 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 2405 transitions. [2022-11-25 17:21:20,965 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:21:20,965 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 2405 transitions. [2022-11-25 17:21:20,968 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 23 states, 22 states have (on average 109.31818181818181) internal successors, (2405), 22 states have internal predecessors, (2405), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:21:20,973 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 23 states, 23 states have (on average 271.0) internal successors, (6233), 23 states have internal predecessors, (6233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:21:20,974 INFO L81 ComplementDD]: Finished complementDD. Result has 23 states, 23 states have (on average 271.0) internal successors, (6233), 23 states have internal predecessors, (6233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:21:20,975 INFO L175 Difference]: Start difference. First operand has 161 places, 225 transitions, 3328 flow. Second operand 22 states and 2405 transitions. [2022-11-25 17:21:20,975 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 177 places, 323 transitions, 4684 flow [2022-11-25 17:21:21,047 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 164 places, 323 transitions, 4440 flow, removed 94 selfloop flow, removed 13 redundant places. [2022-11-25 17:21:21,054 INFO L231 Difference]: Finished difference. Result has 169 places, 257 transitions, 3878 flow [2022-11-25 17:21:21,054 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=271, PETRI_DIFFERENCE_MINUEND_FLOW=3085, PETRI_DIFFERENCE_MINUEND_PLACES=143, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=222, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=90, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=102, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=3878, PETRI_PLACES=169, PETRI_TRANSITIONS=257} [2022-11-25 17:21:21,055 INFO L288 CegarLoopForPetriNet]: 21 programPoint places, 148 predicate places. [2022-11-25 17:21:21,055 INFO L495 AbstractCegarLoop]: Abstraction has has 169 places, 257 transitions, 3878 flow [2022-11-25 17:21:21,055 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 106.23529411764706) internal successors, (1806), 17 states have internal predecessors, (1806), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:21:21,055 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:21:21,056 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:21:21,062 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff2a69db-f292-4098-8ca3-ff948148af61/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-11-25 17:21:21,262 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff2a69db-f292-4098-8ca3-ff948148af61/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:21:21,262 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-25 17:21:21,262 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:21:21,262 INFO L85 PathProgramCache]: Analyzing trace with hash -2142122130, now seen corresponding path program 11 times [2022-11-25 17:21:21,262 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:21:21,263 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1953548021] [2022-11-25 17:21:21,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:21:21,263 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:21:21,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:21:22,078 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:21:22,079 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:21:22,079 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1953548021] [2022-11-25 17:21:22,079 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1953548021] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:21:22,079 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1849409274] [2022-11-25 17:21:22,079 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-25 17:21:22,079 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:21:22,079 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff2a69db-f292-4098-8ca3-ff948148af61/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:21:22,081 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff2a69db-f292-4098-8ca3-ff948148af61/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:21:22,107 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff2a69db-f292-4098-8ca3-ff948148af61/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-11-25 17:21:22,216 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-11-25 17:21:22,217 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 17:21:22,219 INFO L263 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 42 conjunts are in the unsatisfiable core [2022-11-25 17:21:22,220 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:21:22,545 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 17:21:22,546 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 21 [2022-11-25 17:21:22,731 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:21:22,732 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:21:23,028 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 17:21:23,028 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 44 [2022-11-25 17:21:23,033 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 18 [2022-11-25 17:21:23,548 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:21:23,548 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1849409274] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:21:23,549 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 17:21:23,549 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 31 [2022-11-25 17:21:23,549 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [208821056] [2022-11-25 17:21:23,549 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 17:21:23,549 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-11-25 17:21:23,549 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:21:23,550 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-11-25 17:21:23,550 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=147, Invalid=845, Unknown=0, NotChecked=0, Total=992 [2022-11-25 17:21:25,175 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 97 out of 271 [2022-11-25 17:21:25,177 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 169 places, 257 transitions, 3878 flow. Second operand has 32 states, 32 states have (on average 98.5625) internal successors, (3154), 32 states have internal predecessors, (3154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:21:25,179 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:21:25,179 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 97 of 271 [2022-11-25 17:21:25,179 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:21:29,458 INFO L130 PetriNetUnfolder]: 985/1873 cut-off events. [2022-11-25 17:21:29,459 INFO L131 PetriNetUnfolder]: For 17822/17831 co-relation queries the response was YES. [2022-11-25 17:21:29,467 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12805 conditions, 1873 events. 985/1873 cut-off events. For 17822/17831 co-relation queries the response was YES. Maximal size of possible extension queue 127. Compared 10958 event pairs, 46 based on Foata normal form. 69/1931 useless extension candidates. Maximal degree in co-relation 12744. Up to 774 conditions per place. [2022-11-25 17:21:29,473 INFO L137 encePairwiseOnDemand]: 263/271 looper letters, 230 selfloop transitions, 244 changer transitions 2/480 dead transitions. [2022-11-25 17:21:29,473 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 201 places, 480 transitions, 7017 flow [2022-11-25 17:21:29,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-11-25 17:21:29,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2022-11-25 17:21:29,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 3401 transitions. [2022-11-25 17:21:29,477 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.38029743933802973 [2022-11-25 17:21:29,478 INFO L72 ComplementDD]: Start complementDD. Operand 33 states and 3401 transitions. [2022-11-25 17:21:29,478 INFO L73 IsDeterministic]: Start isDeterministic. Operand 33 states and 3401 transitions. [2022-11-25 17:21:29,479 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:21:29,479 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 33 states and 3401 transitions. [2022-11-25 17:21:29,484 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 34 states, 33 states have (on average 103.06060606060606) internal successors, (3401), 33 states have internal predecessors, (3401), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:21:29,491 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 34 states, 34 states have (on average 271.0) internal successors, (9214), 34 states have internal predecessors, (9214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:21:29,493 INFO L81 ComplementDD]: Finished complementDD. Result has 34 states, 34 states have (on average 271.0) internal successors, (9214), 34 states have internal predecessors, (9214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:21:29,493 INFO L175 Difference]: Start difference. First operand has 169 places, 257 transitions, 3878 flow. Second operand 33 states and 3401 transitions. [2022-11-25 17:21:29,493 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 201 places, 480 transitions, 7017 flow [2022-11-25 17:21:29,576 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 189 places, 480 transitions, 6615 flow, removed 125 selfloop flow, removed 12 redundant places. [2022-11-25 17:21:29,582 INFO L231 Difference]: Finished difference. Result has 200 places, 351 transitions, 5802 flow [2022-11-25 17:21:29,583 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=271, PETRI_DIFFERENCE_MINUEND_FLOW=3531, PETRI_DIFFERENCE_MINUEND_PLACES=157, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=255, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=153, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=33, PETRI_FLOW=5802, PETRI_PLACES=200, PETRI_TRANSITIONS=351} [2022-11-25 17:21:29,583 INFO L288 CegarLoopForPetriNet]: 21 programPoint places, 179 predicate places. [2022-11-25 17:21:29,583 INFO L495 AbstractCegarLoop]: Abstraction has has 200 places, 351 transitions, 5802 flow [2022-11-25 17:21:29,583 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 98.5625) internal successors, (3154), 32 states have internal predecessors, (3154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:21:29,583 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:21:29,584 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:21:29,592 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff2a69db-f292-4098-8ca3-ff948148af61/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-11-25 17:21:29,784 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff2a69db-f292-4098-8ca3-ff948148af61/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:21:29,784 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-25 17:21:29,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:21:29,785 INFO L85 PathProgramCache]: Analyzing trace with hash 1883532185, now seen corresponding path program 12 times [2022-11-25 17:21:29,785 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:21:29,785 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1065161968] [2022-11-25 17:21:29,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:21:29,785 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:21:29,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:21:30,993 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:21:30,993 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:21:30,993 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1065161968] [2022-11-25 17:21:30,993 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1065161968] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:21:30,993 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [220856782] [2022-11-25 17:21:30,993 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-25 17:21:30,994 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:21:30,994 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff2a69db-f292-4098-8ca3-ff948148af61/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:21:30,995 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff2a69db-f292-4098-8ca3-ff948148af61/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:21:30,997 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff2a69db-f292-4098-8ca3-ff948148af61/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-11-25 17:21:31,134 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-11-25 17:21:31,135 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 17:21:31,138 INFO L263 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 78 conjunts are in the unsatisfiable core [2022-11-25 17:21:31,140 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:21:31,208 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-25 17:21:31,281 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-25 17:21:31,353 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-11-25 17:21:31,411 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-25 17:21:31,529 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-25 17:21:32,010 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 17:21:32,011 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 48 treesize of output 12 [2022-11-25 17:21:32,137 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:21:32,137 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:21:33,975 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 17:21:33,975 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 3 case distinctions, treesize of input 185 treesize of output 111 [2022-11-25 17:21:34,022 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 17:21:34,023 INFO L350 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 546 treesize of output 530 [2022-11-25 17:21:34,074 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 17:21:34,075 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 381 treesize of output 381 [2022-11-25 17:21:34,117 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 17:21:34,118 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 426 treesize of output 374 [2022-11-25 17:21:35,490 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 17:21:35,491 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 3 case distinctions, treesize of input 185 treesize of output 111 [2022-11-25 17:21:35,534 INFO L321 Elim1Store]: treesize reduction 44, result has 17.0 percent of original size [2022-11-25 17:21:35,534 INFO L350 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 546 treesize of output 486 [2022-11-25 17:21:35,577 INFO L321 Elim1Store]: treesize reduction 44, result has 17.0 percent of original size [2022-11-25 17:21:35,578 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 478 treesize of output 382 [2022-11-25 17:21:35,620 INFO L321 Elim1Store]: treesize reduction 44, result has 17.0 percent of original size [2022-11-25 17:21:35,620 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 374 treesize of output 330 [2022-11-25 17:21:35,969 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:21:35,969 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [220856782] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:21:35,969 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 17:21:35,970 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13, 13] total 37 [2022-11-25 17:21:35,970 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1857940628] [2022-11-25 17:21:35,970 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 17:21:35,970 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-11-25 17:21:35,970 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:21:35,971 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-11-25 17:21:35,971 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=183, Invalid=1279, Unknown=20, NotChecked=0, Total=1482 [2022-11-25 17:21:38,258 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 74 out of 271 [2022-11-25 17:21:38,260 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 200 places, 351 transitions, 5802 flow. Second operand has 39 states, 39 states have (on average 75.48717948717949) internal successors, (2944), 39 states have internal predecessors, (2944), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:21:38,260 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:21:38,261 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 74 of 271 [2022-11-25 17:21:38,261 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:21:38,845 WARN L837 $PredicateComparison]: unable to prove that (let ((.cse17 (* 4 |c_ULTIMATE.start_create_fresh_int_array_~i~1#1|)) (.cse19 (* c_~q_front~0 4)) (.cse20 (* 4 c_~q_back~0)) (.cse18 (+ c_~q_front~0 2))) (let ((.cse0 (<= c_~n~0 .cse18)) (.cse7 (not (<= 0 c_~q_back~0))) (.cse8 (not (< c_~q_back~0 c_~n~0))) (.cse5 (+ .cse20 |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset|)) (.cse4 (+ .cse20 4 |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset|)) (.cse2 (+ .cse19 |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset|)) (.cse3 (+ .cse19 4 |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset|)) (.cse11 (select |c_#memory_int| |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|)) (.cse12 (+ .cse17 |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset|)) (.cse9 (< .cse18 0))) (and (or .cse0 (and (forall ((v_ArrVal_683 (Array Int Int)) (v_ArrVal_682 (Array Int Int))) (let ((.cse1 (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_682) |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_683) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|))) (or (< 1 (+ c_~s~0 (select .cse1 .cse2) (select .cse1 .cse3))) (not (= (select .cse1 .cse4) 1)) (not (= (select .cse1 .cse5) 1))))) (forall ((v_ArrVal_683 (Array Int Int)) (v_ArrVal_682 (Array Int Int))) (let ((.cse6 (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_682) |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_683) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|))) (or (< (+ c_~s~0 (select .cse6 .cse2) (select .cse6 .cse3)) 3) (not (= (select .cse6 .cse4) 1)) (not (= (select .cse6 .cse5) 1)))))) .cse7 (< |c_ULTIMATE.start_create_fresh_int_array_~i~1#1| |c_ULTIMATE.start_create_fresh_int_array_~size#1|) .cse8 .cse9) (or .cse0 .cse7 .cse8 (and (forall ((v_ArrVal_680 Int) (v_ArrVal_683 (Array Int Int)) (v_ArrVal_682 (Array Int Int))) (let ((.cse10 (select (store (store (store |c_#memory_int| |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base| (store .cse11 .cse12 v_ArrVal_680)) |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_682) |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_683) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|))) (or (not (= 1 (select .cse10 .cse5))) (not (= (select .cse10 .cse4) 1)) (< (+ c_~s~0 (select .cse10 .cse3) (select .cse10 .cse2)) 3)))) (forall ((v_ArrVal_680 Int) (v_ArrVal_683 (Array Int Int)) (v_ArrVal_682 (Array Int Int))) (let ((.cse13 (select (store (store (store |c_#memory_int| |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base| (store .cse11 .cse12 v_ArrVal_680)) |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_682) |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_683) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|))) (or (< 1 (+ c_~s~0 (select .cse13 .cse3) (select .cse13 .cse2))) (not (= 1 (select .cse13 .cse5))) (not (= (select .cse13 .cse4) 1)))))) (< (+ 1 |c_ULTIMATE.start_create_fresh_int_array_~i~1#1|) |c_ULTIMATE.start_create_fresh_int_array_~size#1|) .cse9) (or .cse0 .cse7 .cse8 (< (+ 2 |c_ULTIMATE.start_create_fresh_int_array_~i~1#1|) |c_ULTIMATE.start_create_fresh_int_array_~size#1|) (let ((.cse15 (+ .cse17 4 |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset|))) (and (forall ((v_ArrVal_680 Int) (v_ArrVal_683 (Array Int Int)) (v_ArrVal_682 (Array Int Int)) (v_ArrVal_679 Int)) (let ((.cse14 (select (store (store (store |c_#memory_int| |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base| (store (store .cse11 .cse12 v_ArrVal_679) .cse15 v_ArrVal_680)) |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_682) |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_683) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|))) (or (not (= (select .cse14 .cse5) 1)) (not (= (select .cse14 .cse4) 1)) (< 1 (+ c_~s~0 (select .cse14 .cse2) (select .cse14 .cse3)))))) (forall ((v_ArrVal_680 Int) (v_ArrVal_683 (Array Int Int)) (v_ArrVal_682 (Array Int Int)) (v_ArrVal_679 Int)) (let ((.cse16 (select (store (store (store |c_#memory_int| |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base| (store (store .cse11 .cse12 v_ArrVal_679) .cse15 v_ArrVal_680)) |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_682) |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_683) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|))) (or (not (= (select .cse16 .cse5) 1)) (not (= (select .cse16 .cse4) 1)) (< (+ c_~s~0 (select .cse16 .cse2) (select .cse16 .cse3)) 3)))))) .cse9)))) is different from false [2022-11-25 17:21:38,882 WARN L837 $PredicateComparison]: unable to prove that (let ((.cse15 (* 4 c_~q_back~0)) (.cse16 (* c_~q_front~0 4)) (.cse14 (+ c_~q_front~0 2))) (let ((.cse0 (<= c_~n~0 .cse14)) (.cse7 (not (<= 0 c_~q_back~0))) (.cse8 (not (< c_~q_back~0 c_~n~0))) (.cse3 (+ .cse16 4 |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset|)) (.cse2 (+ .cse16 |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset|)) (.cse5 (+ .cse15 |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset|)) (.cse4 (+ .cse15 4 |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset|)) (.cse9 (< .cse14 0))) (and (or .cse0 (and (forall ((v_ArrVal_683 (Array Int Int)) (v_ArrVal_682 (Array Int Int))) (let ((.cse1 (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_682) |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_683) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|))) (or (< 1 (+ c_~s~0 (select .cse1 .cse2) (select .cse1 .cse3))) (not (= (select .cse1 .cse4) 1)) (not (= (select .cse1 .cse5) 1))))) (forall ((v_ArrVal_683 (Array Int Int)) (v_ArrVal_682 (Array Int Int))) (let ((.cse6 (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_682) |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_683) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|))) (or (< (+ c_~s~0 (select .cse6 .cse2) (select .cse6 .cse3)) 3) (not (= (select .cse6 .cse4) 1)) (not (= (select .cse6 .cse5) 1)))))) .cse7 (< |c_ULTIMATE.start_create_fresh_int_array_~i~1#1| |c_ULTIMATE.start_create_fresh_int_array_~size#1|) .cse8 .cse9) (or .cse0 .cse7 .cse8 (let ((.cse11 (select |c_#memory_int| |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|)) (.cse12 (+ (* 4 |c_ULTIMATE.start_create_fresh_int_array_~i~1#1|) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset|))) (and (forall ((v_ArrVal_680 Int) (v_ArrVal_683 (Array Int Int)) (v_ArrVal_682 (Array Int Int))) (let ((.cse10 (select (store (store (store |c_#memory_int| |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base| (store .cse11 .cse12 v_ArrVal_680)) |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_682) |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_683) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|))) (or (not (= 1 (select .cse10 .cse5))) (not (= (select .cse10 .cse4) 1)) (< (+ c_~s~0 (select .cse10 .cse3) (select .cse10 .cse2)) 3)))) (forall ((v_ArrVal_680 Int) (v_ArrVal_683 (Array Int Int)) (v_ArrVal_682 (Array Int Int))) (let ((.cse13 (select (store (store (store |c_#memory_int| |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base| (store .cse11 .cse12 v_ArrVal_680)) |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_682) |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_683) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|))) (or (< 1 (+ c_~s~0 (select .cse13 .cse3) (select .cse13 .cse2))) (not (= 1 (select .cse13 .cse5))) (not (= (select .cse13 .cse4) 1))))))) (< (+ 1 |c_ULTIMATE.start_create_fresh_int_array_~i~1#1|) |c_ULTIMATE.start_create_fresh_int_array_~size#1|) .cse9)))) is different from false [2022-11-25 17:21:45,560 WARN L233 SmtUtils]: Spent 6.15s on a formula simplification. DAG size of input: 73 DAG size of output: 55 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-25 17:21:48,104 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-25 17:21:53,259 INFO L130 PetriNetUnfolder]: 1172/2316 cut-off events. [2022-11-25 17:21:53,259 INFO L131 PetriNetUnfolder]: For 24071/24071 co-relation queries the response was YES. [2022-11-25 17:21:53,271 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17185 conditions, 2316 events. 1172/2316 cut-off events. For 24071/24071 co-relation queries the response was YES. Maximal size of possible extension queue 143. Compared 14596 event pairs, 326 based on Foata normal form. 9/2315 useless extension candidates. Maximal degree in co-relation 17113. Up to 1790 conditions per place. [2022-11-25 17:21:53,278 INFO L137 encePairwiseOnDemand]: 261/271 looper letters, 378 selfloop transitions, 92 changer transitions 56/527 dead transitions. [2022-11-25 17:21:53,279 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 238 places, 527 transitions, 9139 flow [2022-11-25 17:21:53,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-11-25 17:21:53,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2022-11-25 17:21:53,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 3052 transitions. [2022-11-25 17:21:53,283 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.28876904153656924 [2022-11-25 17:21:53,284 INFO L72 ComplementDD]: Start complementDD. Operand 39 states and 3052 transitions. [2022-11-25 17:21:53,284 INFO L73 IsDeterministic]: Start isDeterministic. Operand 39 states and 3052 transitions. [2022-11-25 17:21:53,285 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:21:53,286 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 39 states and 3052 transitions. [2022-11-25 17:21:53,289 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 40 states, 39 states have (on average 78.25641025641026) internal successors, (3052), 39 states have internal predecessors, (3052), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:21:53,298 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 40 states, 40 states have (on average 271.0) internal successors, (10840), 40 states have internal predecessors, (10840), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:21:53,300 INFO L81 ComplementDD]: Finished complementDD. Result has 40 states, 40 states have (on average 271.0) internal successors, (10840), 40 states have internal predecessors, (10840), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:21:53,300 INFO L175 Difference]: Start difference. First operand has 200 places, 351 transitions, 5802 flow. Second operand 39 states and 3052 transitions. [2022-11-25 17:21:53,300 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 238 places, 527 transitions, 9139 flow [2022-11-25 17:21:53,536 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 229 places, 527 transitions, 8507 flow, removed 297 selfloop flow, removed 9 redundant places. [2022-11-25 17:21:53,543 INFO L231 Difference]: Finished difference. Result has 248 places, 414 transitions, 6977 flow [2022-11-25 17:21:53,544 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=271, PETRI_DIFFERENCE_MINUEND_FLOW=5300, PETRI_DIFFERENCE_MINUEND_PLACES=191, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=351, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=273, PETRI_DIFFERENCE_SUBTRAHEND_STATES=39, PETRI_FLOW=6977, PETRI_PLACES=248, PETRI_TRANSITIONS=414} [2022-11-25 17:21:53,544 INFO L288 CegarLoopForPetriNet]: 21 programPoint places, 227 predicate places. [2022-11-25 17:21:53,545 INFO L495 AbstractCegarLoop]: Abstraction has has 248 places, 414 transitions, 6977 flow [2022-11-25 17:21:53,545 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 75.48717948717949) internal successors, (2944), 39 states have internal predecessors, (2944), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:21:53,545 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:21:53,545 INFO L209 CegarLoopForPetriNet]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:21:53,557 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff2a69db-f292-4098-8ca3-ff948148af61/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-11-25 17:21:53,751 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff2a69db-f292-4098-8ca3-ff948148af61/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:21:53,752 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-25 17:21:53,752 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:21:53,752 INFO L85 PathProgramCache]: Analyzing trace with hash 1719924222, now seen corresponding path program 13 times [2022-11-25 17:21:53,752 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:21:53,752 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [549271417] [2022-11-25 17:21:53,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:21:53,752 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:21:53,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:21:54,644 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:21:54,644 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:21:54,644 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [549271417] [2022-11-25 17:21:54,644 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [549271417] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:21:54,645 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [771408456] [2022-11-25 17:21:54,645 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-25 17:21:54,645 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:21:54,645 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff2a69db-f292-4098-8ca3-ff948148af61/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:21:54,648 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff2a69db-f292-4098-8ca3-ff948148af61/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:21:54,675 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff2a69db-f292-4098-8ca3-ff948148af61/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-11-25 17:21:54,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:21:54,785 INFO L263 TraceCheckSpWp]: Trace formula consists of 244 conjuncts, 31 conjunts are in the unsatisfiable core [2022-11-25 17:21:54,786 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:21:55,072 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-25 17:21:55,072 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:21:55,164 INFO L321 Elim1Store]: treesize reduction 5, result has 64.3 percent of original size [2022-11-25 17:21:55,165 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 18 [2022-11-25 17:21:55,397 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-25 17:21:55,397 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [771408456] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:21:55,398 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 17:21:55,398 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 7] total 24 [2022-11-25 17:21:55,398 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1880250466] [2022-11-25 17:21:55,398 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 17:21:55,398 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-11-25 17:21:55,398 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:21:55,399 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-11-25 17:21:55,399 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=520, Unknown=0, NotChecked=0, Total=600 [2022-11-25 17:21:56,780 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 99 out of 271 [2022-11-25 17:21:56,782 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 248 places, 414 transitions, 6977 flow. Second operand has 25 states, 25 states have (on average 101.04) internal successors, (2526), 25 states have internal predecessors, (2526), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:21:56,782 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:21:56,782 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 99 of 271 [2022-11-25 17:21:56,782 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:21:58,951 INFO L130 PetriNetUnfolder]: 1280/2507 cut-off events. [2022-11-25 17:21:58,952 INFO L131 PetriNetUnfolder]: For 28541/28541 co-relation queries the response was YES. [2022-11-25 17:21:58,968 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18845 conditions, 2507 events. 1280/2507 cut-off events. For 28541/28541 co-relation queries the response was YES. Maximal size of possible extension queue 161. Compared 15968 event pairs, 21 based on Foata normal form. 20/2517 useless extension candidates. Maximal degree in co-relation 18754. Up to 788 conditions per place. [2022-11-25 17:21:58,977 INFO L137 encePairwiseOnDemand]: 262/271 looper letters, 241 selfloop transitions, 384 changer transitions 2/628 dead transitions. [2022-11-25 17:21:58,977 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 274 places, 628 transitions, 11057 flow [2022-11-25 17:21:58,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-11-25 17:21:58,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2022-11-25 17:21:58,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 3518 transitions. [2022-11-25 17:21:58,982 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.3818102886911222 [2022-11-25 17:21:58,982 INFO L72 ComplementDD]: Start complementDD. Operand 34 states and 3518 transitions. [2022-11-25 17:21:58,982 INFO L73 IsDeterministic]: Start isDeterministic. Operand 34 states and 3518 transitions. [2022-11-25 17:21:58,984 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:21:58,984 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 34 states and 3518 transitions. [2022-11-25 17:21:58,989 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 35 states, 34 states have (on average 103.47058823529412) internal successors, (3518), 34 states have internal predecessors, (3518), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:21:58,996 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 35 states, 35 states have (on average 271.0) internal successors, (9485), 35 states have internal predecessors, (9485), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:21:58,998 INFO L81 ComplementDD]: Finished complementDD. Result has 35 states, 35 states have (on average 271.0) internal successors, (9485), 35 states have internal predecessors, (9485), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:21:58,998 INFO L175 Difference]: Start difference. First operand has 248 places, 414 transitions, 6977 flow. Second operand 34 states and 3518 transitions. [2022-11-25 17:21:58,998 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 274 places, 628 transitions, 11057 flow [2022-11-25 17:21:59,284 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 258 places, 628 transitions, 10877 flow, removed 76 selfloop flow, removed 16 redundant places. [2022-11-25 17:21:59,293 INFO L231 Difference]: Finished difference. Result has 263 places, 525 transitions, 9944 flow [2022-11-25 17:21:59,294 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=271, PETRI_DIFFERENCE_MINUEND_FLOW=6825, PETRI_DIFFERENCE_MINUEND_PLACES=225, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=414, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=284, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=113, PETRI_DIFFERENCE_SUBTRAHEND_STATES=34, PETRI_FLOW=9944, PETRI_PLACES=263, PETRI_TRANSITIONS=525} [2022-11-25 17:21:59,294 INFO L288 CegarLoopForPetriNet]: 21 programPoint places, 242 predicate places. [2022-11-25 17:21:59,294 INFO L495 AbstractCegarLoop]: Abstraction has has 263 places, 525 transitions, 9944 flow [2022-11-25 17:21:59,295 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 101.04) internal successors, (2526), 25 states have internal predecessors, (2526), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:21:59,295 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:21:59,295 INFO L209 CegarLoopForPetriNet]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:21:59,304 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff2a69db-f292-4098-8ca3-ff948148af61/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-11-25 17:21:59,495 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff2a69db-f292-4098-8ca3-ff948148af61/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:21:59,496 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-25 17:21:59,496 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:21:59,496 INFO L85 PathProgramCache]: Analyzing trace with hash 848480122, now seen corresponding path program 14 times [2022-11-25 17:21:59,496 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:21:59,496 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [535205177] [2022-11-25 17:21:59,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:21:59,496 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:21:59,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:22:00,624 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:22:00,624 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:22:00,624 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [535205177] [2022-11-25 17:22:00,624 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [535205177] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:22:00,624 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [446460701] [2022-11-25 17:22:00,625 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-25 17:22:00,625 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:22:00,625 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff2a69db-f292-4098-8ca3-ff948148af61/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:22:00,626 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff2a69db-f292-4098-8ca3-ff948148af61/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:22:00,643 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff2a69db-f292-4098-8ca3-ff948148af61/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-11-25 17:22:00,767 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-25 17:22:00,768 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 17:22:00,770 INFO L263 TraceCheckSpWp]: Trace formula consists of 244 conjuncts, 28 conjunts are in the unsatisfiable core [2022-11-25 17:22:00,771 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:22:01,066 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 17:22:01,071 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 21 [2022-11-25 17:22:01,144 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-25 17:22:01,144 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:22:01,227 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_768 (Array Int Int))) (not (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_768) c_~q~0.base) (+ (* c_~q_front~0 4) c_~q~0.offset 4)) 0))) is different from false [2022-11-25 17:22:01,244 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 17:22:01,244 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 44 [2022-11-25 17:22:01,248 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 18 [2022-11-25 17:22:01,406 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 10 trivial. 2 not checked. [2022-11-25 17:22:01,407 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [446460701] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:22:01,407 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 17:22:01,407 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9, 7] total 26 [2022-11-25 17:22:01,407 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1588544243] [2022-11-25 17:22:01,407 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 17:22:01,408 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-11-25 17:22:01,408 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:22:01,408 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-11-25 17:22:01,409 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=577, Unknown=1, NotChecked=48, Total=702 [2022-11-25 17:22:01,632 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 88 out of 271 [2022-11-25 17:22:01,633 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 263 places, 525 transitions, 9944 flow. Second operand has 27 states, 27 states have (on average 89.81481481481481) internal successors, (2425), 27 states have internal predecessors, (2425), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:22:01,633 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:22:01,633 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 88 of 271 [2022-11-25 17:22:01,634 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:22:03,819 INFO L130 PetriNetUnfolder]: 1316/2550 cut-off events. [2022-11-25 17:22:03,819 INFO L131 PetriNetUnfolder]: For 36013/36023 co-relation queries the response was YES. [2022-11-25 17:22:03,834 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20485 conditions, 2550 events. 1316/2550 cut-off events. For 36013/36023 co-relation queries the response was YES. Maximal size of possible extension queue 166. Compared 16125 event pairs, 34 based on Foata normal form. 70/2617 useless extension candidates. Maximal degree in co-relation 20394. Up to 1102 conditions per place. [2022-11-25 17:22:03,843 INFO L137 encePairwiseOnDemand]: 264/271 looper letters, 327 selfloop transitions, 277 changer transitions 0/612 dead transitions. [2022-11-25 17:22:03,843 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 281 places, 612 transitions, 12103 flow [2022-11-25 17:22:03,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-11-25 17:22:03,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2022-11-25 17:22:03,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 1765 transitions. [2022-11-25 17:22:03,846 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.3427850067974364 [2022-11-25 17:22:03,846 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 1765 transitions. [2022-11-25 17:22:03,846 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 1765 transitions. [2022-11-25 17:22:03,846 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:22:03,846 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 1765 transitions. [2022-11-25 17:22:03,848 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 92.89473684210526) internal successors, (1765), 19 states have internal predecessors, (1765), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:22:03,854 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 271.0) internal successors, (5420), 20 states have internal predecessors, (5420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:22:03,855 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 271.0) internal successors, (5420), 20 states have internal predecessors, (5420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:22:03,855 INFO L175 Difference]: Start difference. First operand has 263 places, 525 transitions, 9944 flow. Second operand 19 states and 1765 transitions. [2022-11-25 17:22:03,856 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 281 places, 612 transitions, 12103 flow [2022-11-25 17:22:04,151 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 271 places, 612 transitions, 11614 flow, removed 220 selfloop flow, removed 10 redundant places. [2022-11-25 17:22:04,161 INFO L231 Difference]: Finished difference. Result has 275 places, 544 transitions, 10681 flow [2022-11-25 17:22:04,162 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=271, PETRI_DIFFERENCE_MINUEND_FLOW=9354, PETRI_DIFFERENCE_MINUEND_PLACES=253, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=518, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=257, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=255, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=10681, PETRI_PLACES=275, PETRI_TRANSITIONS=544} [2022-11-25 17:22:04,162 INFO L288 CegarLoopForPetriNet]: 21 programPoint places, 254 predicate places. [2022-11-25 17:22:04,162 INFO L495 AbstractCegarLoop]: Abstraction has has 275 places, 544 transitions, 10681 flow [2022-11-25 17:22:04,162 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 89.81481481481481) internal successors, (2425), 27 states have internal predecessors, (2425), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:22:04,162 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:22:04,162 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:22:04,167 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff2a69db-f292-4098-8ca3-ff948148af61/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-11-25 17:22:04,363 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff2a69db-f292-4098-8ca3-ff948148af61/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2022-11-25 17:22:04,363 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-25 17:22:04,363 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:22:04,363 INFO L85 PathProgramCache]: Analyzing trace with hash -443457891, now seen corresponding path program 15 times [2022-11-25 17:22:04,363 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:22:04,364 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1630727743] [2022-11-25 17:22:04,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:22:04,364 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:22:04,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:22:06,087 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:22:06,088 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:22:06,088 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1630727743] [2022-11-25 17:22:06,088 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1630727743] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:22:06,088 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1930109474] [2022-11-25 17:22:06,088 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-25 17:22:06,088 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:22:06,088 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff2a69db-f292-4098-8ca3-ff948148af61/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:22:06,089 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff2a69db-f292-4098-8ca3-ff948148af61/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:22:06,103 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff2a69db-f292-4098-8ca3-ff948148af61/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-11-25 17:22:06,540 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-25 17:22:06,540 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 17:22:06,542 INFO L263 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 69 conjunts are in the unsatisfiable core [2022-11-25 17:22:06,543 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:22:07,205 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 17:22:07,213 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 17:22:07,214 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 42 treesize of output 26 [2022-11-25 17:22:07,426 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:22:07,427 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:22:07,961 INFO L321 Elim1Store]: treesize reduction 12, result has 81.5 percent of original size [2022-11-25 17:22:07,962 INFO L350 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 76 treesize of output 78 [2022-11-25 17:22:08,962 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:22:08,962 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1930109474] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:22:08,962 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 17:22:08,962 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 12] total 36 [2022-11-25 17:22:08,962 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1489189699] [2022-11-25 17:22:08,962 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 17:22:08,963 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-11-25 17:22:08,963 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:22:08,963 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-11-25 17:22:08,964 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=231, Invalid=1175, Unknown=0, NotChecked=0, Total=1406 [2022-11-25 17:22:12,284 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 90 out of 271 [2022-11-25 17:22:12,287 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 275 places, 544 transitions, 10681 flow. Second operand has 38 states, 38 states have (on average 91.47368421052632) internal successors, (3476), 38 states have internal predecessors, (3476), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:22:12,287 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:22:12,287 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 90 of 271 [2022-11-25 17:22:12,287 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:22:20,165 INFO L130 PetriNetUnfolder]: 1358/2697 cut-off events. [2022-11-25 17:22:20,165 INFO L131 PetriNetUnfolder]: For 41012/41012 co-relation queries the response was YES. [2022-11-25 17:22:20,183 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22099 conditions, 2697 events. 1358/2697 cut-off events. For 41012/41012 co-relation queries the response was YES. Maximal size of possible extension queue 179. Compared 17807 event pairs, 225 based on Foata normal form. 75/2772 useless extension candidates. Maximal degree in co-relation 22004. Up to 1329 conditions per place. [2022-11-25 17:22:20,260 INFO L137 encePairwiseOnDemand]: 261/271 looper letters, 415 selfloop transitions, 213 changer transitions 35/664 dead transitions. [2022-11-25 17:22:20,260 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 310 places, 664 transitions, 12851 flow [2022-11-25 17:22:20,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-11-25 17:22:20,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2022-11-25 17:22:20,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 3420 transitions. [2022-11-25 17:22:20,265 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.3505535055350554 [2022-11-25 17:22:20,265 INFO L72 ComplementDD]: Start complementDD. Operand 36 states and 3420 transitions. [2022-11-25 17:22:20,265 INFO L73 IsDeterministic]: Start isDeterministic. Operand 36 states and 3420 transitions. [2022-11-25 17:22:20,266 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:22:20,266 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 36 states and 3420 transitions. [2022-11-25 17:22:20,271 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 37 states, 36 states have (on average 95.0) internal successors, (3420), 36 states have internal predecessors, (3420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:22:20,278 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 37 states, 37 states have (on average 271.0) internal successors, (10027), 37 states have internal predecessors, (10027), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:22:20,279 INFO L81 ComplementDD]: Finished complementDD. Result has 37 states, 37 states have (on average 271.0) internal successors, (10027), 37 states have internal predecessors, (10027), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:22:20,279 INFO L175 Difference]: Start difference. First operand has 275 places, 544 transitions, 10681 flow. Second operand 36 states and 3420 transitions. [2022-11-25 17:22:20,279 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 310 places, 664 transitions, 12851 flow [2022-11-25 17:22:20,559 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 296 places, 664 transitions, 12518 flow, removed 72 selfloop flow, removed 14 redundant places. [2022-11-25 17:22:20,570 INFO L231 Difference]: Finished difference. Result has 306 places, 554 transitions, 11132 flow [2022-11-25 17:22:20,570 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=271, PETRI_DIFFERENCE_MINUEND_FLOW=10005, PETRI_DIFFERENCE_MINUEND_PLACES=261, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=515, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=174, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=334, PETRI_DIFFERENCE_SUBTRAHEND_STATES=36, PETRI_FLOW=11132, PETRI_PLACES=306, PETRI_TRANSITIONS=554} [2022-11-25 17:22:20,571 INFO L288 CegarLoopForPetriNet]: 21 programPoint places, 285 predicate places. [2022-11-25 17:22:20,571 INFO L495 AbstractCegarLoop]: Abstraction has has 306 places, 554 transitions, 11132 flow [2022-11-25 17:22:20,571 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 91.47368421052632) internal successors, (3476), 38 states have internal predecessors, (3476), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:22:20,571 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:22:20,571 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:22:20,580 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff2a69db-f292-4098-8ca3-ff948148af61/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2022-11-25 17:22:20,772 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff2a69db-f292-4098-8ca3-ff948148af61/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2022-11-25 17:22:20,772 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-25 17:22:20,772 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:22:20,772 INFO L85 PathProgramCache]: Analyzing trace with hash 1584689473, now seen corresponding path program 16 times [2022-11-25 17:22:20,773 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:22:20,773 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [715405771] [2022-11-25 17:22:20,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:22:20,773 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:22:20,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:22:22,021 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:22:22,021 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:22:22,021 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [715405771] [2022-11-25 17:22:22,021 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [715405771] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:22:22,021 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2087616971] [2022-11-25 17:22:22,022 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-25 17:22:22,022 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:22:22,022 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff2a69db-f292-4098-8ca3-ff948148af61/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:22:22,023 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff2a69db-f292-4098-8ca3-ff948148af61/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:22:22,027 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff2a69db-f292-4098-8ca3-ff948148af61/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-11-25 17:22:22,153 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-25 17:22:22,153 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 17:22:22,155 INFO L263 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 55 conjunts are in the unsatisfiable core [2022-11-25 17:22:22,157 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:22:22,867 INFO L321 Elim1Store]: treesize reduction 24, result has 11.1 percent of original size [2022-11-25 17:22:22,867 INFO L350 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 46 treesize of output 15 [2022-11-25 17:22:22,924 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:22:22,924 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:22:23,333 INFO L321 Elim1Store]: treesize reduction 12, result has 81.5 percent of original size [2022-11-25 17:22:23,334 INFO L350 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 76 treesize of output 78 [2022-11-25 17:22:24,301 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:22:24,302 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2087616971] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:22:24,302 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 17:22:24,302 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 11] total 33 [2022-11-25 17:22:24,302 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [193962191] [2022-11-25 17:22:24,302 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 17:22:24,303 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-11-25 17:22:24,303 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:22:24,303 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-11-25 17:22:24,304 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=179, Invalid=1011, Unknown=0, NotChecked=0, Total=1190 [2022-11-25 17:22:27,023 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 95 out of 271 [2022-11-25 17:22:27,026 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 306 places, 554 transitions, 11132 flow. Second operand has 35 states, 35 states have (on average 96.65714285714286) internal successors, (3383), 35 states have internal predecessors, (3383), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:22:27,026 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:22:27,026 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 95 of 271 [2022-11-25 17:22:27,027 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:22:31,226 INFO L130 PetriNetUnfolder]: 1345/2658 cut-off events. [2022-11-25 17:22:31,226 INFO L131 PetriNetUnfolder]: For 40188/40188 co-relation queries the response was YES. [2022-11-25 17:22:31,247 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22498 conditions, 2658 events. 1345/2658 cut-off events. For 40188/40188 co-relation queries the response was YES. Maximal size of possible extension queue 165. Compared 17057 event pairs, 282 based on Foata normal form. 4/2662 useless extension candidates. Maximal degree in co-relation 22397. Up to 1329 conditions per place. [2022-11-25 17:22:31,257 INFO L137 encePairwiseOnDemand]: 261/271 looper letters, 406 selfloop transitions, 182 changer transitions 36/625 dead transitions. [2022-11-25 17:22:31,257 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 321 places, 625 transitions, 12939 flow [2022-11-25 17:22:31,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-11-25 17:22:31,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2022-11-25 17:22:31,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 2199 transitions. [2022-11-25 17:22:31,260 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.3688359610868836 [2022-11-25 17:22:31,260 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 2199 transitions. [2022-11-25 17:22:31,260 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 2199 transitions. [2022-11-25 17:22:31,261 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:22:31,261 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 2199 transitions. [2022-11-25 17:22:31,264 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 23 states, 22 states have (on average 99.95454545454545) internal successors, (2199), 22 states have internal predecessors, (2199), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:22:31,268 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 23 states, 23 states have (on average 271.0) internal successors, (6233), 23 states have internal predecessors, (6233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:22:31,269 INFO L81 ComplementDD]: Finished complementDD. Result has 23 states, 23 states have (on average 271.0) internal successors, (6233), 23 states have internal predecessors, (6233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:22:31,270 INFO L175 Difference]: Start difference. First operand has 306 places, 554 transitions, 11132 flow. Second operand 22 states and 2199 transitions. [2022-11-25 17:22:31,270 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 321 places, 625 transitions, 12939 flow [2022-11-25 17:22:31,619 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 304 places, 625 transitions, 12666 flow, removed 110 selfloop flow, removed 17 redundant places. [2022-11-25 17:22:31,629 INFO L231 Difference]: Finished difference. Result has 307 places, 553 transitions, 11170 flow [2022-11-25 17:22:31,630 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=271, PETRI_DIFFERENCE_MINUEND_FLOW=10883, PETRI_DIFFERENCE_MINUEND_PLACES=283, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=554, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=170, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=378, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=11170, PETRI_PLACES=307, PETRI_TRANSITIONS=553} [2022-11-25 17:22:31,630 INFO L288 CegarLoopForPetriNet]: 21 programPoint places, 286 predicate places. [2022-11-25 17:22:31,630 INFO L495 AbstractCegarLoop]: Abstraction has has 307 places, 553 transitions, 11170 flow [2022-11-25 17:22:31,631 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 96.65714285714286) internal successors, (3383), 35 states have internal predecessors, (3383), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:22:31,631 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:22:31,631 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:22:31,639 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff2a69db-f292-4098-8ca3-ff948148af61/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2022-11-25 17:22:31,831 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff2a69db-f292-4098-8ca3-ff948148af61/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2022-11-25 17:22:31,831 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-25 17:22:31,832 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:22:31,832 INFO L85 PathProgramCache]: Analyzing trace with hash -1091984421, now seen corresponding path program 17 times [2022-11-25 17:22:31,832 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:22:31,832 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1052115520] [2022-11-25 17:22:31,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:22:31,832 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:22:31,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:22:33,457 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:22:33,457 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:22:33,457 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1052115520] [2022-11-25 17:22:33,457 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1052115520] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:22:33,458 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [161576612] [2022-11-25 17:22:33,458 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-25 17:22:33,458 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:22:33,458 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff2a69db-f292-4098-8ca3-ff948148af61/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:22:33,459 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff2a69db-f292-4098-8ca3-ff948148af61/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:22:33,462 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff2a69db-f292-4098-8ca3-ff948148af61/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-11-25 17:22:33,606 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-11-25 17:22:33,606 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 17:22:33,609 INFO L263 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 55 conjunts are in the unsatisfiable core [2022-11-25 17:22:33,610 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:22:33,942 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 17:22:33,942 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 46 treesize of output 12 [2022-11-25 17:22:34,057 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-25 17:22:34,057 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:22:34,478 INFO L321 Elim1Store]: treesize reduction 14, result has 73.6 percent of original size [2022-11-25 17:22:34,479 INFO L350 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 100 treesize of output 70 [2022-11-25 17:22:34,760 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-25 17:22:34,760 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [161576612] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:22:34,760 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 17:22:34,760 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 8, 7] total 26 [2022-11-25 17:22:34,760 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1678826268] [2022-11-25 17:22:34,760 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 17:22:34,761 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-11-25 17:22:34,761 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:22:34,761 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-11-25 17:22:34,761 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=673, Unknown=0, NotChecked=0, Total=756 [2022-11-25 17:22:37,415 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 91 out of 271 [2022-11-25 17:22:37,418 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 307 places, 553 transitions, 11170 flow. Second operand has 28 states, 28 states have (on average 92.96428571428571) internal successors, (2603), 28 states have internal predecessors, (2603), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:22:37,418 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:22:37,418 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 91 of 271 [2022-11-25 17:22:37,418 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:22:41,309 INFO L130 PetriNetUnfolder]: 1369/2714 cut-off events. [2022-11-25 17:22:41,309 INFO L131 PetriNetUnfolder]: For 40764/40764 co-relation queries the response was YES. [2022-11-25 17:22:41,330 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23134 conditions, 2714 events. 1369/2714 cut-off events. For 40764/40764 co-relation queries the response was YES. Maximal size of possible extension queue 164. Compared 17514 event pairs, 225 based on Foata normal form. 5/2719 useless extension candidates. Maximal degree in co-relation 23034. Up to 2218 conditions per place. [2022-11-25 17:22:41,411 INFO L137 encePairwiseOnDemand]: 262/271 looper letters, 530 selfloop transitions, 109 changer transitions 25/665 dead transitions. [2022-11-25 17:22:41,411 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 333 places, 665 transitions, 13646 flow [2022-11-25 17:22:41,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-11-25 17:22:41,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2022-11-25 17:22:41,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 3430 transitions. [2022-11-25 17:22:41,420 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.35157851578515786 [2022-11-25 17:22:41,420 INFO L72 ComplementDD]: Start complementDD. Operand 36 states and 3430 transitions. [2022-11-25 17:22:41,420 INFO L73 IsDeterministic]: Start isDeterministic. Operand 36 states and 3430 transitions. [2022-11-25 17:22:41,421 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:22:41,421 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 36 states and 3430 transitions. [2022-11-25 17:22:41,426 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 37 states, 36 states have (on average 95.27777777777777) internal successors, (3430), 36 states have internal predecessors, (3430), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:22:41,437 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 37 states, 37 states have (on average 271.0) internal successors, (10027), 37 states have internal predecessors, (10027), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:22:41,439 INFO L81 ComplementDD]: Finished complementDD. Result has 37 states, 37 states have (on average 271.0) internal successors, (10027), 37 states have internal predecessors, (10027), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:22:41,440 INFO L175 Difference]: Start difference. First operand has 307 places, 553 transitions, 11170 flow. Second operand 36 states and 3430 transitions. [2022-11-25 17:22:41,440 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 333 places, 665 transitions, 13646 flow [2022-11-25 17:22:41,813 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 319 places, 665 transitions, 13513 flow, removed 30 selfloop flow, removed 14 redundant places. [2022-11-25 17:22:41,824 INFO L231 Difference]: Finished difference. Result has 324 places, 573 transitions, 11689 flow [2022-11-25 17:22:41,824 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=271, PETRI_DIFFERENCE_MINUEND_FLOW=11046, PETRI_DIFFERENCE_MINUEND_PLACES=284, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=553, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=96, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=453, PETRI_DIFFERENCE_SUBTRAHEND_STATES=36, PETRI_FLOW=11689, PETRI_PLACES=324, PETRI_TRANSITIONS=573} [2022-11-25 17:22:41,825 INFO L288 CegarLoopForPetriNet]: 21 programPoint places, 303 predicate places. [2022-11-25 17:22:41,825 INFO L495 AbstractCegarLoop]: Abstraction has has 324 places, 573 transitions, 11689 flow [2022-11-25 17:22:41,825 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 92.96428571428571) internal successors, (2603), 28 states have internal predecessors, (2603), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:22:41,825 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:22:41,825 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:22:41,830 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff2a69db-f292-4098-8ca3-ff948148af61/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2022-11-25 17:22:42,026 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff2a69db-f292-4098-8ca3-ff948148af61/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:22:42,026 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-25 17:22:42,027 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:22:42,027 INFO L85 PathProgramCache]: Analyzing trace with hash 1041046483, now seen corresponding path program 18 times [2022-11-25 17:22:42,027 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:22:42,027 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [190818242] [2022-11-25 17:22:42,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:22:42,027 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:22:42,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:22:43,107 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:22:43,107 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:22:43,108 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [190818242] [2022-11-25 17:22:43,108 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [190818242] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:22:43,108 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1428166270] [2022-11-25 17:22:43,108 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-25 17:22:43,108 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:22:43,108 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff2a69db-f292-4098-8ca3-ff948148af61/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:22:43,112 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff2a69db-f292-4098-8ca3-ff948148af61/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:22:43,138 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff2a69db-f292-4098-8ca3-ff948148af61/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-11-25 17:22:43,274 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-11-25 17:22:43,274 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 17:22:43,277 INFO L263 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 65 conjunts are in the unsatisfiable core [2022-11-25 17:22:43,278 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:22:43,890 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 17:22:43,891 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 48 treesize of output 12 [2022-11-25 17:22:44,004 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:22:44,004 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:22:44,525 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 17:22:44,525 INFO L350 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 77 treesize of output 78 [2022-11-25 17:22:45,202 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:22:45,202 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1428166270] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:22:45,202 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 17:22:45,202 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 35 [2022-11-25 17:22:45,202 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [348562469] [2022-11-25 17:22:45,203 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 17:22:45,203 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-11-25 17:22:45,203 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:22:45,203 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-11-25 17:22:45,204 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=209, Invalid=1123, Unknown=0, NotChecked=0, Total=1332 [2022-11-25 17:22:47,374 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 94 out of 271 [2022-11-25 17:22:47,376 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 324 places, 573 transitions, 11689 flow. Second operand has 37 states, 37 states have (on average 95.56756756756756) internal successors, (3536), 37 states have internal predecessors, (3536), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:22:47,376 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:22:47,376 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 94 of 271 [2022-11-25 17:22:47,376 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:22:51,204 INFO L130 PetriNetUnfolder]: 1348/2661 cut-off events. [2022-11-25 17:22:51,204 INFO L131 PetriNetUnfolder]: For 40870/40870 co-relation queries the response was YES. [2022-11-25 17:22:51,221 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22814 conditions, 2661 events. 1348/2661 cut-off events. For 40870/40870 co-relation queries the response was YES. Maximal size of possible extension queue 168. Compared 17125 event pairs, 239 based on Foata normal form. 3/2664 useless extension candidates. Maximal degree in co-relation 22711. Up to 2307 conditions per place. [2022-11-25 17:22:51,230 INFO L137 encePairwiseOnDemand]: 261/271 looper letters, 508 selfloop transitions, 94 changer transitions 29/632 dead transitions. [2022-11-25 17:22:51,230 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 349 places, 632 transitions, 13311 flow [2022-11-25 17:22:51,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-11-25 17:22:51,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2022-11-25 17:22:51,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 3032 transitions. [2022-11-25 17:22:51,234 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.3609094155457684 [2022-11-25 17:22:51,234 INFO L72 ComplementDD]: Start complementDD. Operand 31 states and 3032 transitions. [2022-11-25 17:22:51,234 INFO L73 IsDeterministic]: Start isDeterministic. Operand 31 states and 3032 transitions. [2022-11-25 17:22:51,235 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:22:51,235 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 31 states and 3032 transitions. [2022-11-25 17:22:51,238 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 32 states, 31 states have (on average 97.80645161290323) internal successors, (3032), 31 states have internal predecessors, (3032), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:22:51,243 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 32 states, 32 states have (on average 271.0) internal successors, (8672), 32 states have internal predecessors, (8672), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:22:51,245 INFO L81 ComplementDD]: Finished complementDD. Result has 32 states, 32 states have (on average 271.0) internal successors, (8672), 32 states have internal predecessors, (8672), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:22:51,245 INFO L175 Difference]: Start difference. First operand has 324 places, 573 transitions, 11689 flow. Second operand 31 states and 3032 transitions. [2022-11-25 17:22:51,245 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 349 places, 632 transitions, 13311 flow [2022-11-25 17:22:51,595 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 334 places, 632 transitions, 13073 flow, removed 51 selfloop flow, removed 15 redundant places. [2022-11-25 17:22:51,606 INFO L231 Difference]: Finished difference. Result has 337 places, 565 transitions, 11522 flow [2022-11-25 17:22:51,607 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=271, PETRI_DIFFERENCE_MINUEND_FLOW=11438, PETRI_DIFFERENCE_MINUEND_PLACES=304, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=571, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=93, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=477, PETRI_DIFFERENCE_SUBTRAHEND_STATES=31, PETRI_FLOW=11522, PETRI_PLACES=337, PETRI_TRANSITIONS=565} [2022-11-25 17:22:51,607 INFO L288 CegarLoopForPetriNet]: 21 programPoint places, 316 predicate places. [2022-11-25 17:22:51,608 INFO L495 AbstractCegarLoop]: Abstraction has has 337 places, 565 transitions, 11522 flow [2022-11-25 17:22:51,608 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 95.56756756756756) internal successors, (3536), 37 states have internal predecessors, (3536), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:22:51,608 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:22:51,608 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:22:51,613 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff2a69db-f292-4098-8ca3-ff948148af61/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2022-11-25 17:22:51,808 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff2a69db-f292-4098-8ca3-ff948148af61/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2022-11-25 17:22:51,809 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-25 17:22:51,809 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:22:51,809 INFO L85 PathProgramCache]: Analyzing trace with hash 2113778197, now seen corresponding path program 19 times [2022-11-25 17:22:51,809 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:22:51,809 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1400131860] [2022-11-25 17:22:51,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:22:51,809 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:22:51,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:22:53,131 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:22:53,131 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:22:53,132 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1400131860] [2022-11-25 17:22:53,132 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1400131860] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:22:53,132 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [282049250] [2022-11-25 17:22:53,132 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-25 17:22:53,132 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:22:53,133 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff2a69db-f292-4098-8ca3-ff948148af61/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:22:53,134 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff2a69db-f292-4098-8ca3-ff948148af61/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:22:53,137 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff2a69db-f292-4098-8ca3-ff948148af61/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-11-25 17:22:53,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:22:53,272 INFO L263 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 57 conjunts are in the unsatisfiable core [2022-11-25 17:22:53,274 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:22:53,670 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 17:22:53,671 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 30 [2022-11-25 17:22:53,863 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 17:22:53,863 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 46 treesize of output 12 [2022-11-25 17:22:53,917 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-25 17:22:53,917 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:22:54,093 WARN L837 $PredicateComparison]: unable to prove that (let ((.cse4 (* c_~q_front~0 4))) (let ((.cse1 (+ .cse4 c_~q~0.offset)) (.cse2 (+ .cse4 c_~q~0.offset 4))) (and (forall ((v_ArrVal_959 (Array Int Int))) (<= c_~N~0 (let ((.cse0 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_959) c_~q~0.base))) (+ c_~s~0 (select .cse0 .cse1) (select .cse0 .cse2))))) (forall ((v_ArrVal_959 (Array Int Int))) (< (let ((.cse3 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_959) c_~q~0.base))) (+ c_~s~0 (select .cse3 .cse1) (select .cse3 .cse2))) (+ c_~N~0 1)))))) is different from false [2022-11-25 17:22:54,342 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 17:22:54,342 INFO L350 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 139 treesize of output 140 [2022-11-25 17:22:54,353 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 17:22:54,354 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 79 treesize of output 66 [2022-11-25 17:22:54,363 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 17:22:54,363 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 66 treesize of output 53 [2022-11-25 17:22:54,704 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-25 17:22:54,705 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [282049250] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:22:54,705 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 17:22:54,705 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11, 9] total 32 [2022-11-25 17:22:54,705 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1951848563] [2022-11-25 17:22:54,705 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 17:22:54,705 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-11-25 17:22:54,706 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:22:54,706 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-11-25 17:22:54,707 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=962, Unknown=1, NotChecked=62, Total=1122 [2022-11-25 17:22:54,939 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 77 out of 271 [2022-11-25 17:22:54,942 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 337 places, 565 transitions, 11522 flow. Second operand has 34 states, 34 states have (on average 78.6470588235294) internal successors, (2674), 34 states have internal predecessors, (2674), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:22:54,942 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:22:54,942 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 77 of 271 [2022-11-25 17:22:54,942 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:22:56,755 WARN L837 $PredicateComparison]: unable to prove that (let ((.cse6 (* c_~q_front~0 4))) (let ((.cse3 (+ .cse6 c_~q~0.offset)) (.cse4 (+ .cse6 c_~q~0.offset 4))) (let ((.cse0 (forall ((v_ArrVal_959 (Array Int Int))) (<= c_~N~0 (let ((.cse5 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_959) c_~q~0.base))) (+ c_~s~0 (select .cse5 .cse3) (select .cse5 .cse4)))))) (.cse1 (forall ((v_ArrVal_959 (Array Int Int))) (< (let ((.cse2 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_959) c_~q~0.base))) (+ c_~s~0 (select .cse2 .cse3) (select .cse2 .cse4))) (+ c_~N~0 1))))) (and (or (and .cse0 .cse1) (< |c_thread1Thread1of1ForFork1_~i~0#1| c_~N~0)) .cse0 .cse1)))) is different from false [2022-11-25 17:22:58,036 INFO L130 PetriNetUnfolder]: 1433/2867 cut-off events. [2022-11-25 17:22:58,037 INFO L131 PetriNetUnfolder]: For 41974/41974 co-relation queries the response was YES. [2022-11-25 17:22:58,072 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24319 conditions, 2867 events. 1433/2867 cut-off events. For 41974/41974 co-relation queries the response was YES. Maximal size of possible extension queue 192. Compared 19239 event pairs, 127 based on Foata normal form. 4/2871 useless extension candidates. Maximal degree in co-relation 24212. Up to 2079 conditions per place. [2022-11-25 17:22:58,082 INFO L137 encePairwiseOnDemand]: 260/271 looper letters, 446 selfloop transitions, 218 changer transitions 6/671 dead transitions. [2022-11-25 17:22:58,083 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 351 places, 671 transitions, 14224 flow [2022-11-25 17:22:58,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-11-25 17:22:58,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2022-11-25 17:22:58,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 1957 transitions. [2022-11-25 17:22:58,086 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.3008917589175892 [2022-11-25 17:22:58,086 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 1957 transitions. [2022-11-25 17:22:58,086 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 1957 transitions. [2022-11-25 17:22:58,087 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:22:58,087 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 1957 transitions. [2022-11-25 17:22:58,090 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 81.54166666666667) internal successors, (1957), 24 states have internal predecessors, (1957), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:22:58,092 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 271.0) internal successors, (6775), 25 states have internal predecessors, (6775), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:22:58,093 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 271.0) internal successors, (6775), 25 states have internal predecessors, (6775), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:22:58,093 INFO L175 Difference]: Start difference. First operand has 337 places, 565 transitions, 11522 flow. Second operand 24 states and 1957 transitions. [2022-11-25 17:22:58,093 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 351 places, 671 transitions, 14224 flow [2022-11-25 17:22:58,539 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 329 places, 671 transitions, 14041 flow, removed 18 selfloop flow, removed 22 redundant places. [2022-11-25 17:22:58,553 INFO L231 Difference]: Finished difference. Result has 337 places, 617 transitions, 13114 flow [2022-11-25 17:22:58,553 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=271, PETRI_DIFFERENCE_MINUEND_FLOW=11341, PETRI_DIFFERENCE_MINUEND_PLACES=306, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=565, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=168, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=351, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=13114, PETRI_PLACES=337, PETRI_TRANSITIONS=617} [2022-11-25 17:22:58,554 INFO L288 CegarLoopForPetriNet]: 21 programPoint places, 316 predicate places. [2022-11-25 17:22:58,554 INFO L495 AbstractCegarLoop]: Abstraction has has 337 places, 617 transitions, 13114 flow [2022-11-25 17:22:58,554 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 78.6470588235294) internal successors, (2674), 34 states have internal predecessors, (2674), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:22:58,554 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:22:58,554 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:22:58,559 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff2a69db-f292-4098-8ca3-ff948148af61/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2022-11-25 17:22:58,755 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26,26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff2a69db-f292-4098-8ca3-ff948148af61/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:22:58,755 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-25 17:22:58,755 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:22:58,755 INFO L85 PathProgramCache]: Analyzing trace with hash 780221707, now seen corresponding path program 20 times [2022-11-25 17:22:58,755 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:22:58,756 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [71665971] [2022-11-25 17:22:58,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:22:58,756 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:22:58,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:23:00,445 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:23:00,445 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:23:00,445 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [71665971] [2022-11-25 17:23:00,445 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [71665971] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:23:00,445 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1328387412] [2022-11-25 17:23:00,446 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-25 17:23:00,446 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:23:00,446 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff2a69db-f292-4098-8ca3-ff948148af61/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:23:00,447 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff2a69db-f292-4098-8ca3-ff948148af61/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:23:00,450 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff2a69db-f292-4098-8ca3-ff948148af61/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2022-11-25 17:23:00,591 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-25 17:23:00,591 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 17:23:00,594 INFO L263 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 59 conjunts are in the unsatisfiable core [2022-11-25 17:23:00,595 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:23:00,966 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 17:23:00,967 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 30 [2022-11-25 17:23:01,288 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 17:23:01,289 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 48 treesize of output 12 [2022-11-25 17:23:01,373 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-25 17:23:01,373 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:23:01,932 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 17:23:01,932 INFO L350 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 139 treesize of output 140 [2022-11-25 17:23:01,941 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 17:23:01,942 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 79 treesize of output 66 [2022-11-25 17:23:01,950 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 17:23:01,951 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 66 treesize of output 53 [2022-11-25 17:23:02,232 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-25 17:23:02,232 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1328387412] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:23:02,232 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 17:23:02,232 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11, 9] total 32 [2022-11-25 17:23:02,233 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [96328863] [2022-11-25 17:23:02,233 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 17:23:02,233 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-11-25 17:23:02,233 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:23:02,233 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-11-25 17:23:02,234 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=1026, Unknown=2, NotChecked=0, Total=1122 [2022-11-25 17:23:07,347 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 74 out of 271 [2022-11-25 17:23:07,349 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 337 places, 617 transitions, 13114 flow. Second operand has 34 states, 34 states have (on average 75.61764705882354) internal successors, (2571), 34 states have internal predecessors, (2571), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:23:07,349 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:23:07,349 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 74 of 271 [2022-11-25 17:23:07,349 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:23:14,369 INFO L130 PetriNetUnfolder]: 1657/3283 cut-off events. [2022-11-25 17:23:14,369 INFO L131 PetriNetUnfolder]: For 50798/50798 co-relation queries the response was YES. [2022-11-25 17:23:14,401 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28945 conditions, 3283 events. 1657/3283 cut-off events. For 50798/50798 co-relation queries the response was YES. Maximal size of possible extension queue 192. Compared 21983 event pairs, 108 based on Foata normal form. 14/3297 useless extension candidates. Maximal degree in co-relation 28833. Up to 1998 conditions per place. [2022-11-25 17:23:14,414 INFO L137 encePairwiseOnDemand]: 262/271 looper letters, 470 selfloop transitions, 311 changer transitions 68/850 dead transitions. [2022-11-25 17:23:14,414 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 382 places, 850 transitions, 17364 flow [2022-11-25 17:23:14,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-11-25 17:23:14,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2022-11-25 17:23:14,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 3765 transitions. [2022-11-25 17:23:14,420 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.2894372693726937 [2022-11-25 17:23:14,420 INFO L72 ComplementDD]: Start complementDD. Operand 48 states and 3765 transitions. [2022-11-25 17:23:14,420 INFO L73 IsDeterministic]: Start isDeterministic. Operand 48 states and 3765 transitions. [2022-11-25 17:23:14,421 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:23:14,421 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 48 states and 3765 transitions. [2022-11-25 17:23:14,427 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 49 states, 48 states have (on average 78.4375) internal successors, (3765), 48 states have internal predecessors, (3765), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:23:14,436 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 49 states, 49 states have (on average 271.0) internal successors, (13279), 49 states have internal predecessors, (13279), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:23:14,439 INFO L81 ComplementDD]: Finished complementDD. Result has 49 states, 49 states have (on average 271.0) internal successors, (13279), 49 states have internal predecessors, (13279), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:23:14,439 INFO L175 Difference]: Start difference. First operand has 337 places, 617 transitions, 13114 flow. Second operand 48 states and 3765 transitions. [2022-11-25 17:23:14,439 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 382 places, 850 transitions, 17364 flow [2022-11-25 17:23:15,224 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 370 places, 850 transitions, 17051 flow, removed 102 selfloop flow, removed 12 redundant places. [2022-11-25 17:23:15,249 INFO L231 Difference]: Finished difference. Result has 391 places, 708 transitions, 15174 flow [2022-11-25 17:23:15,250 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=271, PETRI_DIFFERENCE_MINUEND_FLOW=12702, PETRI_DIFFERENCE_MINUEND_PLACES=323, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=610, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=224, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=331, PETRI_DIFFERENCE_SUBTRAHEND_STATES=48, PETRI_FLOW=15174, PETRI_PLACES=391, PETRI_TRANSITIONS=708} [2022-11-25 17:23:15,251 INFO L288 CegarLoopForPetriNet]: 21 programPoint places, 370 predicate places. [2022-11-25 17:23:15,251 INFO L495 AbstractCegarLoop]: Abstraction has has 391 places, 708 transitions, 15174 flow [2022-11-25 17:23:15,252 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 75.61764705882354) internal successors, (2571), 34 states have internal predecessors, (2571), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:23:15,252 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:23:15,252 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:23:15,259 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff2a69db-f292-4098-8ca3-ff948148af61/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2022-11-25 17:23:15,458 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff2a69db-f292-4098-8ca3-ff948148af61/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2022-11-25 17:23:15,458 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-25 17:23:15,458 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:23:15,459 INFO L85 PathProgramCache]: Analyzing trace with hash -301639945, now seen corresponding path program 21 times [2022-11-25 17:23:15,459 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:23:15,459 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [121328473] [2022-11-25 17:23:15,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:23:15,459 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:23:15,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:23:17,125 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:23:17,125 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:23:17,126 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [121328473] [2022-11-25 17:23:17,126 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [121328473] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:23:17,126 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1462753334] [2022-11-25 17:23:17,126 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-25 17:23:17,126 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:23:17,126 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff2a69db-f292-4098-8ca3-ff948148af61/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:23:17,128 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff2a69db-f292-4098-8ca3-ff948148af61/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:23:17,136 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff2a69db-f292-4098-8ca3-ff948148af61/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2022-11-25 17:23:17,570 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-25 17:23:17,571 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 17:23:17,573 INFO L263 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 79 conjunts are in the unsatisfiable core [2022-11-25 17:23:17,575 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:23:18,049 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 17:23:18,049 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 21 [2022-11-25 17:23:18,440 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 17:23:18,440 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 44 treesize of output 12 [2022-11-25 17:23:18,739 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:23:18,739 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:23:19,511 INFO L321 Elim1Store]: treesize reduction 14, result has 73.6 percent of original size [2022-11-25 17:23:19,511 INFO L350 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 194 treesize of output 172 [2022-11-25 17:23:19,537 INFO L321 Elim1Store]: treesize reduction 15, result has 44.4 percent of original size [2022-11-25 17:23:19,537 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 129 treesize of output 122 [2022-11-25 17:23:19,559 INFO L321 Elim1Store]: treesize reduction 15, result has 44.4 percent of original size [2022-11-25 17:23:19,559 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 109 treesize of output 102 [2022-11-25 17:23:20,431 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:23:20,433 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1462753334] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:23:20,433 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 17:23:20,433 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13, 13] total 37 [2022-11-25 17:23:20,433 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1058855802] [2022-11-25 17:23:20,433 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 17:23:20,433 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-11-25 17:23:20,434 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:23:20,434 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-11-25 17:23:20,435 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=274, Invalid=1204, Unknown=4, NotChecked=0, Total=1482 [2022-11-25 17:23:23,385 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 77 out of 271 [2022-11-25 17:23:23,387 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 391 places, 708 transitions, 15174 flow. Second operand has 39 states, 39 states have (on average 78.43589743589743) internal successors, (3059), 39 states have internal predecessors, (3059), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:23:23,388 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:23:23,388 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 77 of 271 [2022-11-25 17:23:23,388 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:23:34,670 INFO L130 PetriNetUnfolder]: 1721/3428 cut-off events. [2022-11-25 17:23:34,670 INFO L131 PetriNetUnfolder]: For 56782/56782 co-relation queries the response was YES. [2022-11-25 17:23:34,722 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31271 conditions, 3428 events. 1721/3428 cut-off events. For 56782/56782 co-relation queries the response was YES. Maximal size of possible extension queue 188. Compared 23017 event pairs, 161 based on Foata normal form. 39/3467 useless extension candidates. Maximal degree in co-relation 31137. Up to 1386 conditions per place. [2022-11-25 17:23:34,738 INFO L137 encePairwiseOnDemand]: 261/271 looper letters, 415 selfloop transitions, 440 changer transitions 22/878 dead transitions. [2022-11-25 17:23:34,738 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 421 places, 878 transitions, 18758 flow [2022-11-25 17:23:34,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-11-25 17:23:34,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2022-11-25 17:23:34,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 3680 transitions. [2022-11-25 17:23:34,742 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.3017630176301763 [2022-11-25 17:23:34,742 INFO L72 ComplementDD]: Start complementDD. Operand 45 states and 3680 transitions. [2022-11-25 17:23:34,742 INFO L73 IsDeterministic]: Start isDeterministic. Operand 45 states and 3680 transitions. [2022-11-25 17:23:34,743 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:23:34,743 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 45 states and 3680 transitions. [2022-11-25 17:23:34,748 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 46 states, 45 states have (on average 81.77777777777777) internal successors, (3680), 45 states have internal predecessors, (3680), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:23:34,756 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 46 states, 46 states have (on average 271.0) internal successors, (12466), 46 states have internal predecessors, (12466), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:23:34,759 INFO L81 ComplementDD]: Finished complementDD. Result has 46 states, 46 states have (on average 271.0) internal successors, (12466), 46 states have internal predecessors, (12466), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:23:34,759 INFO L175 Difference]: Start difference. First operand has 391 places, 708 transitions, 15174 flow. Second operand 45 states and 3680 transitions. [2022-11-25 17:23:34,759 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 421 places, 878 transitions, 18758 flow [2022-11-25 17:23:35,578 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 394 places, 878 transitions, 18046 flow, removed 220 selfloop flow, removed 27 redundant places. [2022-11-25 17:23:35,601 INFO L231 Difference]: Finished difference. Result has 408 places, 758 transitions, 16744 flow [2022-11-25 17:23:35,602 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=271, PETRI_DIFFERENCE_MINUEND_FLOW=14367, PETRI_DIFFERENCE_MINUEND_PLACES=350, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=698, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=376, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=306, PETRI_DIFFERENCE_SUBTRAHEND_STATES=45, PETRI_FLOW=16744, PETRI_PLACES=408, PETRI_TRANSITIONS=758} [2022-11-25 17:23:35,605 INFO L288 CegarLoopForPetriNet]: 21 programPoint places, 387 predicate places. [2022-11-25 17:23:35,605 INFO L495 AbstractCegarLoop]: Abstraction has has 408 places, 758 transitions, 16744 flow [2022-11-25 17:23:35,606 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 78.43589743589743) internal successors, (3059), 39 states have internal predecessors, (3059), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:23:35,606 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:23:35,606 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:23:35,620 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff2a69db-f292-4098-8ca3-ff948148af61/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2022-11-25 17:23:35,812 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff2a69db-f292-4098-8ca3-ff948148af61/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2022-11-25 17:23:35,812 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-25 17:23:35,813 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:23:35,813 INFO L85 PathProgramCache]: Analyzing trace with hash 1060320937, now seen corresponding path program 22 times [2022-11-25 17:23:35,813 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:23:35,813 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [37721197] [2022-11-25 17:23:35,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:23:35,813 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:23:35,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:23:37,711 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:23:37,711 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:23:37,711 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [37721197] [2022-11-25 17:23:37,712 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [37721197] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:23:37,712 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1811936189] [2022-11-25 17:23:37,712 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-25 17:23:37,712 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:23:37,712 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff2a69db-f292-4098-8ca3-ff948148af61/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:23:37,713 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff2a69db-f292-4098-8ca3-ff948148af61/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:23:37,715 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff2a69db-f292-4098-8ca3-ff948148af61/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2022-11-25 17:23:37,866 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-25 17:23:37,866 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 17:23:37,868 INFO L263 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 62 conjunts are in the unsatisfiable core [2022-11-25 17:23:37,870 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:23:38,309 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 17:23:38,310 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2022-11-25 17:23:38,647 INFO L321 Elim1Store]: treesize reduction 15, result has 44.4 percent of original size [2022-11-25 17:23:38,647 INFO L350 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 58 treesize of output 28 [2022-11-25 17:23:38,864 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:23:38,864 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:23:39,590 INFO L321 Elim1Store]: treesize reduction 12, result has 81.5 percent of original size [2022-11-25 17:23:39,591 INFO L350 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 310 treesize of output 270 [2022-11-25 17:23:39,621 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 17:23:39,622 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 213 treesize of output 208 [2022-11-25 17:23:39,652 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 17:23:39,652 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 181 treesize of output 176 [2022-11-25 17:23:41,437 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:23:41,437 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1811936189] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:23:41,437 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 17:23:41,437 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 12] total 36 [2022-11-25 17:23:41,438 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [12254668] [2022-11-25 17:23:41,438 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 17:23:41,438 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-11-25 17:23:41,438 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:23:41,439 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-11-25 17:23:41,439 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=183, Invalid=1219, Unknown=4, NotChecked=0, Total=1406 [2022-11-25 17:23:42,972 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 74 out of 271 [2022-11-25 17:23:42,974 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 408 places, 758 transitions, 16744 flow. Second operand has 38 states, 38 states have (on average 75.52631578947368) internal successors, (2870), 38 states have internal predecessors, (2870), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:23:42,974 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:23:42,974 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 74 of 271 [2022-11-25 17:23:42,974 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:23:57,142 WARN L233 SmtUtils]: Spent 12.68s on a formula simplification. DAG size of input: 101 DAG size of output: 94 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-25 17:24:06,315 WARN L233 SmtUtils]: Spent 8.55s on a formula simplification. DAG size of input: 110 DAG size of output: 98 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-25 17:24:27,995 WARN L233 SmtUtils]: Spent 20.74s on a formula simplification. DAG size of input: 116 DAG size of output: 107 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-25 17:24:56,095 WARN L233 SmtUtils]: Spent 27.17s on a formula simplification. DAG size of input: 114 DAG size of output: 105 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-25 17:25:09,402 WARN L233 SmtUtils]: Spent 12.63s on a formula simplification. DAG size of input: 106 DAG size of output: 97 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-25 17:25:20,318 WARN L233 SmtUtils]: Spent 10.79s on a formula simplification. DAG size of input: 107 DAG size of output: 97 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-25 17:25:33,131 WARN L233 SmtUtils]: Spent 12.70s on a formula simplification. DAG size of input: 108 DAG size of output: 103 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-25 17:25:57,111 WARN L233 SmtUtils]: Spent 22.84s on a formula simplification. DAG size of input: 96 DAG size of output: 91 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-25 17:25:59,156 INFO L130 PetriNetUnfolder]: 1783/3544 cut-off events. [2022-11-25 17:25:59,156 INFO L131 PetriNetUnfolder]: For 61415/61415 co-relation queries the response was YES. [2022-11-25 17:25:59,201 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33616 conditions, 3544 events. 1783/3544 cut-off events. For 61415/61415 co-relation queries the response was YES. Maximal size of possible extension queue 175. Compared 23691 event pairs, 315 based on Foata normal form. 15/3559 useless extension candidates. Maximal degree in co-relation 33477. Up to 1604 conditions per place. [2022-11-25 17:25:59,216 INFO L137 encePairwiseOnDemand]: 262/271 looper letters, 539 selfloop transitions, 313 changer transitions 24/877 dead transitions. [2022-11-25 17:25:59,216 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 435 places, 877 transitions, 19873 flow [2022-11-25 17:25:59,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-11-25 17:25:59,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2022-11-25 17:25:59,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 2666 transitions. [2022-11-25 17:25:59,218 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.2893423051877578 [2022-11-25 17:25:59,218 INFO L72 ComplementDD]: Start complementDD. Operand 34 states and 2666 transitions. [2022-11-25 17:25:59,219 INFO L73 IsDeterministic]: Start isDeterministic. Operand 34 states and 2666 transitions. [2022-11-25 17:25:59,219 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:25:59,219 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 34 states and 2666 transitions. [2022-11-25 17:25:59,221 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 35 states, 34 states have (on average 78.41176470588235) internal successors, (2666), 34 states have internal predecessors, (2666), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:25:59,225 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 35 states, 35 states have (on average 271.0) internal successors, (9485), 35 states have internal predecessors, (9485), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:25:59,226 INFO L81 ComplementDD]: Finished complementDD. Result has 35 states, 35 states have (on average 271.0) internal successors, (9485), 35 states have internal predecessors, (9485), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:25:59,227 INFO L175 Difference]: Start difference. First operand has 408 places, 758 transitions, 16744 flow. Second operand 34 states and 2666 transitions. [2022-11-25 17:25:59,227 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 435 places, 877 transitions, 19873 flow [2022-11-25 17:26:00,022 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 412 places, 877 transitions, 19227 flow, removed 164 selfloop flow, removed 23 redundant places. [2022-11-25 17:26:00,046 INFO L231 Difference]: Finished difference. Result has 417 places, 770 transitions, 17241 flow [2022-11-25 17:26:00,047 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=271, PETRI_DIFFERENCE_MINUEND_FLOW=15998, PETRI_DIFFERENCE_MINUEND_PLACES=379, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=750, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=285, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=462, PETRI_DIFFERENCE_SUBTRAHEND_STATES=34, PETRI_FLOW=17241, PETRI_PLACES=417, PETRI_TRANSITIONS=770} [2022-11-25 17:26:00,048 INFO L288 CegarLoopForPetriNet]: 21 programPoint places, 396 predicate places. [2022-11-25 17:26:00,048 INFO L495 AbstractCegarLoop]: Abstraction has has 417 places, 770 transitions, 17241 flow [2022-11-25 17:26:00,049 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 75.52631578947368) internal successors, (2870), 38 states have internal predecessors, (2870), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:26:00,049 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:26:00,049 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:26:00,055 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff2a69db-f292-4098-8ca3-ff948148af61/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2022-11-25 17:26:00,255 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff2a69db-f292-4098-8ca3-ff948148af61/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:26:00,255 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-25 17:26:00,255 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:26:00,255 INFO L85 PathProgramCache]: Analyzing trace with hash 1597879902, now seen corresponding path program 23 times [2022-11-25 17:26:00,256 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:26:00,256 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1075091356] [2022-11-25 17:26:00,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:26:00,256 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:26:00,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:26:00,433 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-25 17:26:00,434 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:26:00,434 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1075091356] [2022-11-25 17:26:00,434 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1075091356] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:26:00,434 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2118201567] [2022-11-25 17:26:00,434 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-25 17:26:00,434 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:26:00,434 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff2a69db-f292-4098-8ca3-ff948148af61/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:26:00,435 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff2a69db-f292-4098-8ca3-ff948148af61/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:26:00,437 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff2a69db-f292-4098-8ca3-ff948148af61/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2022-11-25 17:26:00,600 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-11-25 17:26:00,600 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 17:26:00,602 INFO L263 TraceCheckSpWp]: Trace formula consists of 259 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-25 17:26:00,603 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:26:00,802 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-25 17:26:00,802 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:26:01,007 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-25 17:26:01,007 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2118201567] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:26:01,007 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 17:26:01,007 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 9, 9] total 20 [2022-11-25 17:26:01,007 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [729452268] [2022-11-25 17:26:01,007 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 17:26:01,008 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-11-25 17:26:01,008 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:26:01,008 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-11-25 17:26:01,008 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=318, Unknown=0, NotChecked=0, Total=420 [2022-11-25 17:26:01,250 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 108 out of 271 [2022-11-25 17:26:01,252 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 417 places, 770 transitions, 17241 flow. Second operand has 21 states, 21 states have (on average 110.04761904761905) internal successors, (2311), 21 states have internal predecessors, (2311), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:26:01,252 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:26:01,252 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 108 of 271 [2022-11-25 17:26:01,252 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:26:02,975 INFO L130 PetriNetUnfolder]: 1363/2690 cut-off events. [2022-11-25 17:26:02,976 INFO L131 PetriNetUnfolder]: For 50846/50856 co-relation queries the response was YES. [2022-11-25 17:26:02,998 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25456 conditions, 2690 events. 1363/2690 cut-off events. For 50846/50856 co-relation queries the response was YES. Maximal size of possible extension queue 202. Compared 18089 event pairs, 47 based on Foata normal form. 194/2880 useless extension candidates. Maximal degree in co-relation 25317. Up to 1020 conditions per place. [2022-11-25 17:26:03,008 INFO L137 encePairwiseOnDemand]: 264/271 looper letters, 160 selfloop transitions, 280 changer transitions 208/656 dead transitions. [2022-11-25 17:26:03,008 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 410 places, 656 transitions, 15068 flow [2022-11-25 17:26:03,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-11-25 17:26:03,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2022-11-25 17:26:03,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 2270 transitions. [2022-11-25 17:26:03,011 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4188191881918819 [2022-11-25 17:26:03,011 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 2270 transitions. [2022-11-25 17:26:03,011 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 2270 transitions. [2022-11-25 17:26:03,011 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:26:03,011 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 2270 transitions. [2022-11-25 17:26:03,013 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 21 states, 20 states have (on average 113.5) internal successors, (2270), 20 states have internal predecessors, (2270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:26:03,015 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 21 states, 21 states have (on average 271.0) internal successors, (5691), 21 states have internal predecessors, (5691), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:26:03,016 INFO L81 ComplementDD]: Finished complementDD. Result has 21 states, 21 states have (on average 271.0) internal successors, (5691), 21 states have internal predecessors, (5691), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:26:03,016 INFO L175 Difference]: Start difference. First operand has 417 places, 770 transitions, 17241 flow. Second operand 20 states and 2270 transitions. [2022-11-25 17:26:03,016 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 410 places, 656 transitions, 15068 flow [2022-11-25 17:26:03,426 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 360 places, 656 transitions, 14431 flow, removed 96 selfloop flow, removed 50 redundant places. [2022-11-25 17:26:03,435 INFO L231 Difference]: Finished difference. Result has 364 places, 420 transitions, 10162 flow [2022-11-25 17:26:03,436 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=271, PETRI_DIFFERENCE_MINUEND_FLOW=10725, PETRI_DIFFERENCE_MINUEND_PLACES=341, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=490, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=204, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=235, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=10162, PETRI_PLACES=364, PETRI_TRANSITIONS=420} [2022-11-25 17:26:03,436 INFO L288 CegarLoopForPetriNet]: 21 programPoint places, 343 predicate places. [2022-11-25 17:26:03,436 INFO L495 AbstractCegarLoop]: Abstraction has has 364 places, 420 transitions, 10162 flow [2022-11-25 17:26:03,437 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 110.04761904761905) internal successors, (2311), 21 states have internal predecessors, (2311), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:26:03,437 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:26:03,437 INFO L209 CegarLoopForPetriNet]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:26:03,441 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff2a69db-f292-4098-8ca3-ff948148af61/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2022-11-25 17:26:03,639 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff2a69db-f292-4098-8ca3-ff948148af61/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2022-11-25 17:26:03,639 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-25 17:26:03,639 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:26:03,639 INFO L85 PathProgramCache]: Analyzing trace with hash -1143768570, now seen corresponding path program 24 times [2022-11-25 17:26:03,640 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:26:03,640 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [117748190] [2022-11-25 17:26:03,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:26:03,640 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:26:03,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:26:05,299 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:26:05,299 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:26:05,299 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [117748190] [2022-11-25 17:26:05,299 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [117748190] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:26:05,299 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [592443282] [2022-11-25 17:26:05,299 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-25 17:26:05,299 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:26:05,300 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff2a69db-f292-4098-8ca3-ff948148af61/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:26:05,300 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff2a69db-f292-4098-8ca3-ff948148af61/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:26:05,303 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff2a69db-f292-4098-8ca3-ff948148af61/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2022-11-25 17:26:05,620 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-11-25 17:26:05,620 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 17:26:05,621 INFO L263 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 34 conjunts are in the unsatisfiable core [2022-11-25 17:26:05,623 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:26:05,864 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 17:26:05,865 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2022-11-25 17:26:05,938 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 7 [2022-11-25 17:26:06,041 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-11-25 17:26:06,041 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:26:06,302 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 17:26:06,302 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 86 treesize of output 74 [2022-11-25 17:26:06,309 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 57 treesize of output 51 [2022-11-25 17:26:06,323 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 45 [2022-11-25 17:26:06,606 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-11-25 17:26:06,606 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [592443282] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:26:06,606 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 17:26:06,606 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 7, 7] total 27 [2022-11-25 17:26:06,606 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [539680709] [2022-11-25 17:26:06,606 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 17:26:06,607 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-11-25 17:26:06,607 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:26:06,607 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-11-25 17:26:06,607 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=717, Unknown=2, NotChecked=0, Total=812 [2022-11-25 17:26:09,069 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 77 out of 271 [2022-11-25 17:26:09,070 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 364 places, 420 transitions, 10162 flow. Second operand has 29 states, 29 states have (on average 78.75862068965517) internal successors, (2284), 29 states have internal predecessors, (2284), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:26:09,070 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:26:09,070 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 77 of 271 [2022-11-25 17:26:09,070 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:26:11,434 INFO L130 PetriNetUnfolder]: 1056/1983 cut-off events. [2022-11-25 17:26:11,434 INFO L131 PetriNetUnfolder]: For 43467/43470 co-relation queries the response was YES. [2022-11-25 17:26:11,455 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20739 conditions, 1983 events. 1056/1983 cut-off events. For 43467/43470 co-relation queries the response was YES. Maximal size of possible extension queue 131. Compared 11586 event pairs, 137 based on Foata normal form. 6/1989 useless extension candidates. Maximal degree in co-relation 20628. Up to 1690 conditions per place. [2022-11-25 17:26:11,466 INFO L137 encePairwiseOnDemand]: 263/271 looper letters, 372 selfloop transitions, 95 changer transitions 14/482 dead transitions. [2022-11-25 17:26:11,466 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 264 places, 482 transitions, 12094 flow [2022-11-25 17:26:11,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-11-25 17:26:11,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2022-11-25 17:26:11,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 1705 transitions. [2022-11-25 17:26:11,468 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.29959585310138814 [2022-11-25 17:26:11,469 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 1705 transitions. [2022-11-25 17:26:11,469 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 1705 transitions. [2022-11-25 17:26:11,469 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:26:11,470 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 1705 transitions. [2022-11-25 17:26:11,472 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 81.19047619047619) internal successors, (1705), 21 states have internal predecessors, (1705), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:26:11,475 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 271.0) internal successors, (5962), 22 states have internal predecessors, (5962), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:26:11,476 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 271.0) internal successors, (5962), 22 states have internal predecessors, (5962), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:26:11,476 INFO L175 Difference]: Start difference. First operand has 364 places, 420 transitions, 10162 flow. Second operand 21 states and 1705 transitions. [2022-11-25 17:26:11,476 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 264 places, 482 transitions, 12094 flow [2022-11-25 17:26:11,762 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 240 places, 482 transitions, 11049 flow, removed 394 selfloop flow, removed 24 redundant places. [2022-11-25 17:26:11,771 INFO L231 Difference]: Finished difference. Result has 242 places, 435 transitions, 9903 flow [2022-11-25 17:26:11,772 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=271, PETRI_DIFFERENCE_MINUEND_FLOW=9166, PETRI_DIFFERENCE_MINUEND_PLACES=220, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=420, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=76, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=344, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=9903, PETRI_PLACES=242, PETRI_TRANSITIONS=435} [2022-11-25 17:26:11,772 INFO L288 CegarLoopForPetriNet]: 21 programPoint places, 221 predicate places. [2022-11-25 17:26:11,772 INFO L495 AbstractCegarLoop]: Abstraction has has 242 places, 435 transitions, 9903 flow [2022-11-25 17:26:11,773 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 78.75862068965517) internal successors, (2284), 29 states have internal predecessors, (2284), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:26:11,773 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:26:11,773 INFO L209 CegarLoopForPetriNet]: trace histogram [4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:26:11,783 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff2a69db-f292-4098-8ca3-ff948148af61/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Ended with exit code 0 [2022-11-25 17:26:11,979 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff2a69db-f292-4098-8ca3-ff948148af61/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2022-11-25 17:26:11,980 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-25 17:26:11,980 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:26:11,980 INFO L85 PathProgramCache]: Analyzing trace with hash 2023531669, now seen corresponding path program 25 times [2022-11-25 17:26:11,980 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:26:11,980 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1367722133] [2022-11-25 17:26:11,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:26:11,980 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:26:12,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:26:14,066 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:26:14,067 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:26:14,067 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1367722133] [2022-11-25 17:26:14,067 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1367722133] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:26:14,067 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [36489103] [2022-11-25 17:26:14,067 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-25 17:26:14,067 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:26:14,067 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff2a69db-f292-4098-8ca3-ff948148af61/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:26:14,068 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff2a69db-f292-4098-8ca3-ff948148af61/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:26:14,071 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff2a69db-f292-4098-8ca3-ff948148af61/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2022-11-25 17:26:14,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:26:14,232 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 59 conjunts are in the unsatisfiable core [2022-11-25 17:26:14,233 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:26:14,706 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 17:26:14,707 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 30 [2022-11-25 17:26:14,895 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 17:26:14,895 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 48 treesize of output 12 [2022-11-25 17:26:15,012 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-25 17:26:15,012 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:26:15,552 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 17:26:15,553 INFO L350 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 139 treesize of output 140 [2022-11-25 17:26:15,562 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 17:26:15,562 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 79 treesize of output 66 [2022-11-25 17:26:15,570 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 17:26:15,571 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 66 treesize of output 53 [2022-11-25 17:26:15,882 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-25 17:26:15,882 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [36489103] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:26:15,882 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 17:26:15,882 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 9] total 34 [2022-11-25 17:26:15,883 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1123508722] [2022-11-25 17:26:15,883 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 17:26:15,883 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-11-25 17:26:15,883 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:26:15,884 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-11-25 17:26:15,884 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=1153, Unknown=3, NotChecked=0, Total=1260 [2022-11-25 17:26:17,226 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 77 out of 271 [2022-11-25 17:26:17,227 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 242 places, 435 transitions, 9903 flow. Second operand has 36 states, 36 states have (on average 78.61111111111111) internal successors, (2830), 36 states have internal predecessors, (2830), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:26:17,227 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:26:17,228 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 77 of 271 [2022-11-25 17:26:17,228 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:26:21,241 INFO L130 PetriNetUnfolder]: 1121/2154 cut-off events. [2022-11-25 17:26:21,241 INFO L131 PetriNetUnfolder]: For 39417/39420 co-relation queries the response was YES. [2022-11-25 17:26:21,253 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20105 conditions, 2154 events. 1121/2154 cut-off events. For 39417/39420 co-relation queries the response was YES. Maximal size of possible extension queue 149. Compared 13093 event pairs, 86 based on Foata normal form. 10/2164 useless extension candidates. Maximal degree in co-relation 20007. Up to 1499 conditions per place. [2022-11-25 17:26:21,262 INFO L137 encePairwiseOnDemand]: 263/271 looper letters, 328 selfloop transitions, 182 changer transitions 31/542 dead transitions. [2022-11-25 17:26:21,262 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 271 places, 542 transitions, 12257 flow [2022-11-25 17:26:21,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-11-25 17:26:21,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2022-11-25 17:26:21,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 2675 transitions. [2022-11-25 17:26:21,264 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.29911662752991164 [2022-11-25 17:26:21,264 INFO L72 ComplementDD]: Start complementDD. Operand 33 states and 2675 transitions. [2022-11-25 17:26:21,264 INFO L73 IsDeterministic]: Start isDeterministic. Operand 33 states and 2675 transitions. [2022-11-25 17:26:21,265 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:26:21,265 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 33 states and 2675 transitions. [2022-11-25 17:26:21,267 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 34 states, 33 states have (on average 81.06060606060606) internal successors, (2675), 33 states have internal predecessors, (2675), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:26:21,271 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 34 states, 34 states have (on average 271.0) internal successors, (9214), 34 states have internal predecessors, (9214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:26:21,273 INFO L81 ComplementDD]: Finished complementDD. Result has 34 states, 34 states have (on average 271.0) internal successors, (9214), 34 states have internal predecessors, (9214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:26:21,273 INFO L175 Difference]: Start difference. First operand has 242 places, 435 transitions, 9903 flow. Second operand 33 states and 2675 transitions. [2022-11-25 17:26:21,273 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 271 places, 542 transitions, 12257 flow [2022-11-25 17:26:21,488 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 254 places, 542 transitions, 11912 flow, removed 60 selfloop flow, removed 17 redundant places. [2022-11-25 17:26:21,500 INFO L231 Difference]: Finished difference. Result has 264 places, 463 transitions, 10574 flow [2022-11-25 17:26:21,501 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=271, PETRI_DIFFERENCE_MINUEND_FLOW=9572, PETRI_DIFFERENCE_MINUEND_PLACES=222, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=435, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=158, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=270, PETRI_DIFFERENCE_SUBTRAHEND_STATES=33, PETRI_FLOW=10574, PETRI_PLACES=264, PETRI_TRANSITIONS=463} [2022-11-25 17:26:21,501 INFO L288 CegarLoopForPetriNet]: 21 programPoint places, 243 predicate places. [2022-11-25 17:26:21,502 INFO L495 AbstractCegarLoop]: Abstraction has has 264 places, 463 transitions, 10574 flow [2022-11-25 17:26:21,502 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 78.61111111111111) internal successors, (2830), 36 states have internal predecessors, (2830), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:26:21,502 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:26:21,502 INFO L209 CegarLoopForPetriNet]: trace histogram [4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:26:21,508 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff2a69db-f292-4098-8ca3-ff948148af61/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2022-11-25 17:26:21,703 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff2a69db-f292-4098-8ca3-ff948148af61/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:26:21,703 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-25 17:26:21,703 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:26:21,703 INFO L85 PathProgramCache]: Analyzing trace with hash -435006683, now seen corresponding path program 26 times [2022-11-25 17:26:21,703 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:26:21,703 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1538613759] [2022-11-25 17:26:21,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:26:21,704 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:26:21,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:26:22,371 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 3 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:26:22,372 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:26:22,372 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1538613759] [2022-11-25 17:26:22,372 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1538613759] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:26:22,372 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [289600389] [2022-11-25 17:26:22,372 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-25 17:26:22,372 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:26:22,372 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff2a69db-f292-4098-8ca3-ff948148af61/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:26:22,373 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff2a69db-f292-4098-8ca3-ff948148af61/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:26:22,375 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff2a69db-f292-4098-8ca3-ff948148af61/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2022-11-25 17:26:22,528 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-25 17:26:22,528 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 17:26:22,530 INFO L263 TraceCheckSpWp]: Trace formula consists of 267 conjuncts, 46 conjunts are in the unsatisfiable core [2022-11-25 17:26:22,531 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:26:23,108 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:26:23,108 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:26:23,343 INFO L321 Elim1Store]: treesize reduction 5, result has 64.3 percent of original size [2022-11-25 17:26:23,344 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 18 [2022-11-25 17:26:23,905 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:26:23,905 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [289600389] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:26:23,906 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 17:26:23,906 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 37 [2022-11-25 17:26:23,907 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1792549501] [2022-11-25 17:26:23,907 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 17:26:23,907 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-11-25 17:26:23,907 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:26:23,908 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-11-25 17:26:23,908 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=254, Invalid=1152, Unknown=0, NotChecked=0, Total=1406 [2022-11-25 17:26:25,379 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 102 out of 271 [2022-11-25 17:26:25,381 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 264 places, 463 transitions, 10574 flow. Second operand has 38 states, 38 states have (on average 103.55263157894737) internal successors, (3935), 38 states have internal predecessors, (3935), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:26:25,381 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:26:25,381 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 102 of 271 [2022-11-25 17:26:25,381 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:26:32,320 INFO L130 PetriNetUnfolder]: 2486/4569 cut-off events. [2022-11-25 17:26:32,321 INFO L131 PetriNetUnfolder]: For 70369/70382 co-relation queries the response was YES. [2022-11-25 17:26:32,355 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40120 conditions, 4569 events. 2486/4569 cut-off events. For 70369/70382 co-relation queries the response was YES. Maximal size of possible extension queue 295. Compared 30803 event pairs, 73 based on Foata normal form. 275/4841 useless extension candidates. Maximal degree in co-relation 40017. Up to 2576 conditions per place. [2022-11-25 17:26:32,376 INFO L137 encePairwiseOnDemand]: 263/271 looper letters, 464 selfloop transitions, 740 changer transitions 1/1215 dead transitions. [2022-11-25 17:26:32,377 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 340 places, 1215 transitions, 23709 flow [2022-11-25 17:26:32,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2022-11-25 17:26:32,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2022-11-25 17:26:32,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 8793 transitions. [2022-11-25 17:26:32,384 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4005740057400574 [2022-11-25 17:26:32,384 INFO L72 ComplementDD]: Start complementDD. Operand 81 states and 8793 transitions. [2022-11-25 17:26:32,385 INFO L73 IsDeterministic]: Start isDeterministic. Operand 81 states and 8793 transitions. [2022-11-25 17:26:32,386 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:26:32,386 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 81 states and 8793 transitions. [2022-11-25 17:26:32,391 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 82 states, 81 states have (on average 108.55555555555556) internal successors, (8793), 81 states have internal predecessors, (8793), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:26:32,401 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 82 states, 82 states have (on average 271.0) internal successors, (22222), 82 states have internal predecessors, (22222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:26:32,403 INFO L81 ComplementDD]: Finished complementDD. Result has 82 states, 82 states have (on average 271.0) internal successors, (22222), 82 states have internal predecessors, (22222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:26:32,403 INFO L175 Difference]: Start difference. First operand has 264 places, 463 transitions, 10574 flow. Second operand 81 states and 8793 transitions. [2022-11-25 17:26:32,404 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 340 places, 1215 transitions, 23709 flow [2022-11-25 17:26:32,893 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 322 places, 1215 transitions, 23275 flow, removed 123 selfloop flow, removed 18 redundant places. [2022-11-25 17:26:32,918 INFO L231 Difference]: Finished difference. Result has 337 places, 951 transitions, 22058 flow [2022-11-25 17:26:32,919 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=271, PETRI_DIFFERENCE_MINUEND_FLOW=10324, PETRI_DIFFERENCE_MINUEND_PLACES=242, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=463, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=348, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=81, PETRI_DIFFERENCE_SUBTRAHEND_STATES=81, PETRI_FLOW=22058, PETRI_PLACES=337, PETRI_TRANSITIONS=951} [2022-11-25 17:26:32,919 INFO L288 CegarLoopForPetriNet]: 21 programPoint places, 316 predicate places. [2022-11-25 17:26:32,920 INFO L495 AbstractCegarLoop]: Abstraction has has 337 places, 951 transitions, 22058 flow [2022-11-25 17:26:32,920 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 103.55263157894737) internal successors, (3935), 38 states have internal predecessors, (3935), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:26:32,920 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:26:32,921 INFO L209 CegarLoopForPetriNet]: trace histogram [4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:26:32,927 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff2a69db-f292-4098-8ca3-ff948148af61/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Ended with exit code 0 [2022-11-25 17:26:33,126 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff2a69db-f292-4098-8ca3-ff948148af61/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:26:33,127 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-25 17:26:33,127 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:26:33,127 INFO L85 PathProgramCache]: Analyzing trace with hash -2140736395, now seen corresponding path program 27 times [2022-11-25 17:26:33,127 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:26:33,127 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1042530007] [2022-11-25 17:26:33,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:26:33,127 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:26:33,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:26:33,824 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:26:33,824 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:26:33,824 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1042530007] [2022-11-25 17:26:33,824 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1042530007] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:26:33,824 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1638048017] [2022-11-25 17:26:33,825 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-25 17:26:33,825 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:26:33,825 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff2a69db-f292-4098-8ca3-ff948148af61/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:26:33,828 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff2a69db-f292-4098-8ca3-ff948148af61/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:26:33,851 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff2a69db-f292-4098-8ca3-ff948148af61/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2022-11-25 17:26:34,111 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-25 17:26:34,112 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 17:26:34,114 INFO L263 TraceCheckSpWp]: Trace formula consists of 255 conjuncts, 40 conjunts are in the unsatisfiable core [2022-11-25 17:26:34,116 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:26:34,781 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 6 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-25 17:26:34,781 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:26:35,085 INFO L321 Elim1Store]: treesize reduction 22, result has 46.3 percent of original size [2022-11-25 17:26:35,086 INFO L350 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 38 treesize of output 31 [2022-11-25 17:26:35,380 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-25 17:26:35,380 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1638048017] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:26:35,380 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 17:26:35,380 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 12] total 34 [2022-11-25 17:26:35,381 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1269421661] [2022-11-25 17:26:35,381 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 17:26:35,381 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-11-25 17:26:35,381 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:26:35,381 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-11-25 17:26:35,382 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=203, Invalid=987, Unknown=0, NotChecked=0, Total=1190 [2022-11-25 17:26:36,746 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 102 out of 271 [2022-11-25 17:26:36,747 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 337 places, 951 transitions, 22058 flow. Second operand has 35 states, 35 states have (on average 103.57142857142857) internal successors, (3625), 35 states have internal predecessors, (3625), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:26:36,747 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:26:36,747 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 102 of 271 [2022-11-25 17:26:36,747 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:26:44,082 INFO L130 PetriNetUnfolder]: 4176/7741 cut-off events. [2022-11-25 17:26:44,082 INFO L131 PetriNetUnfolder]: For 119081/119098 co-relation queries the response was YES. [2022-11-25 17:26:44,165 INFO L83 FinitePrefix]: Finished finitePrefix Result has 72679 conditions, 7741 events. 4176/7741 cut-off events. For 119081/119098 co-relation queries the response was YES. Maximal size of possible extension queue 434. Compared 57403 event pairs, 488 based on Foata normal form. 185/7922 useless extension candidates. Maximal degree in co-relation 72565. Up to 4687 conditions per place. [2022-11-25 17:26:44,199 INFO L137 encePairwiseOnDemand]: 263/271 looper letters, 1009 selfloop transitions, 842 changer transitions 2/1863 dead transitions. [2022-11-25 17:26:44,199 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 377 places, 1863 transitions, 43502 flow [2022-11-25 17:26:44,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-11-25 17:26:44,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2022-11-25 17:26:44,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 4371 transitions. [2022-11-25 17:26:44,203 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.3933939339393394 [2022-11-25 17:26:44,203 INFO L72 ComplementDD]: Start complementDD. Operand 41 states and 4371 transitions. [2022-11-25 17:26:44,204 INFO L73 IsDeterministic]: Start isDeterministic. Operand 41 states and 4371 transitions. [2022-11-25 17:26:44,204 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:26:44,204 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 41 states and 4371 transitions. [2022-11-25 17:26:44,207 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 42 states, 41 states have (on average 106.60975609756098) internal successors, (4371), 41 states have internal predecessors, (4371), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:26:44,212 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 42 states, 42 states have (on average 271.0) internal successors, (11382), 42 states have internal predecessors, (11382), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:26:44,213 INFO L81 ComplementDD]: Finished complementDD. Result has 42 states, 42 states have (on average 271.0) internal successors, (11382), 42 states have internal predecessors, (11382), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:26:44,213 INFO L175 Difference]: Start difference. First operand has 337 places, 951 transitions, 22058 flow. Second operand 41 states and 4371 transitions. [2022-11-25 17:26:44,213 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 377 places, 1863 transitions, 43502 flow [2022-11-25 17:26:45,499 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 370 places, 1863 transitions, 35048 flow, removed 4212 selfloop flow, removed 7 redundant places. [2022-11-25 17:26:45,536 INFO L231 Difference]: Finished difference. Result has 383 places, 1520 transitions, 30437 flow [2022-11-25 17:26:45,537 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=271, PETRI_DIFFERENCE_MINUEND_FLOW=18088, PETRI_DIFFERENCE_MINUEND_PLACES=330, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=944, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=362, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=478, PETRI_DIFFERENCE_SUBTRAHEND_STATES=41, PETRI_FLOW=30437, PETRI_PLACES=383, PETRI_TRANSITIONS=1520} [2022-11-25 17:26:45,537 INFO L288 CegarLoopForPetriNet]: 21 programPoint places, 362 predicate places. [2022-11-25 17:26:45,537 INFO L495 AbstractCegarLoop]: Abstraction has has 383 places, 1520 transitions, 30437 flow [2022-11-25 17:26:45,538 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 103.57142857142857) internal successors, (3625), 35 states have internal predecessors, (3625), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:26:45,538 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:26:45,538 INFO L209 CegarLoopForPetriNet]: trace histogram [4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:26:45,543 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff2a69db-f292-4098-8ca3-ff948148af61/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2022-11-25 17:26:45,738 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff2a69db-f292-4098-8ca3-ff948148af61/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:26:45,738 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-25 17:26:45,739 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:26:45,739 INFO L85 PathProgramCache]: Analyzing trace with hash 2137901465, now seen corresponding path program 28 times [2022-11-25 17:26:45,739 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:26:45,739 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [261657856] [2022-11-25 17:26:45,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:26:45,739 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:26:45,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:26:46,645 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:26:46,646 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:26:46,646 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [261657856] [2022-11-25 17:26:46,646 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [261657856] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:26:46,646 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [539156368] [2022-11-25 17:26:46,646 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-25 17:26:46,646 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:26:46,646 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff2a69db-f292-4098-8ca3-ff948148af61/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:26:46,660 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff2a69db-f292-4098-8ca3-ff948148af61/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:26:46,683 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff2a69db-f292-4098-8ca3-ff948148af61/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2022-11-25 17:26:46,842 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-25 17:26:46,842 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 17:26:46,844 INFO L263 TraceCheckSpWp]: Trace formula consists of 267 conjuncts, 32 conjunts are in the unsatisfiable core [2022-11-25 17:26:46,845 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:26:47,441 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:26:47,441 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:26:47,584 INFO L321 Elim1Store]: treesize reduction 5, result has 64.3 percent of original size [2022-11-25 17:26:47,584 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 18 [2022-11-25 17:26:48,336 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 1 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:26:48,337 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [539156368] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:26:48,337 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 17:26:48,337 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 37 [2022-11-25 17:26:48,337 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1349578532] [2022-11-25 17:26:48,337 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 17:26:48,338 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-11-25 17:26:48,338 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:26:48,338 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-11-25 17:26:48,339 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=255, Invalid=1151, Unknown=0, NotChecked=0, Total=1406 [2022-11-25 17:26:49,582 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 102 out of 271 [2022-11-25 17:26:49,584 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 383 places, 1520 transitions, 30437 flow. Second operand has 38 states, 38 states have (on average 103.5) internal successors, (3933), 38 states have internal predecessors, (3933), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:26:49,584 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:26:49,584 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 102 of 271 [2022-11-25 17:26:49,584 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:26:59,952 INFO L130 PetriNetUnfolder]: 5434/10179 cut-off events. [2022-11-25 17:26:59,952 INFO L131 PetriNetUnfolder]: For 144697/144717 co-relation queries the response was YES. [2022-11-25 17:27:00,112 INFO L83 FinitePrefix]: Finished finitePrefix Result has 86760 conditions, 10179 events. 5434/10179 cut-off events. For 144697/144717 co-relation queries the response was YES. Maximal size of possible extension queue 594. Compared 80569 event pairs, 432 based on Foata normal form. 375/10550 useless extension candidates. Maximal degree in co-relation 86632. Up to 4399 conditions per place. [2022-11-25 17:27:00,285 INFO L137 encePairwiseOnDemand]: 263/271 looper letters, 1053 selfloop transitions, 1320 changer transitions 30/2413 dead transitions. [2022-11-25 17:27:00,286 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 430 places, 2413 transitions, 50765 flow [2022-11-25 17:27:00,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-11-25 17:27:00,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2022-11-25 17:27:00,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 5174 transitions. [2022-11-25 17:27:00,292 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.39775522755227555 [2022-11-25 17:27:00,292 INFO L72 ComplementDD]: Start complementDD. Operand 48 states and 5174 transitions. [2022-11-25 17:27:00,293 INFO L73 IsDeterministic]: Start isDeterministic. Operand 48 states and 5174 transitions. [2022-11-25 17:27:00,294 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:27:00,295 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 48 states and 5174 transitions. [2022-11-25 17:27:00,299 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 49 states, 48 states have (on average 107.79166666666667) internal successors, (5174), 48 states have internal predecessors, (5174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:27:00,306 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 49 states, 49 states have (on average 271.0) internal successors, (13279), 49 states have internal predecessors, (13279), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:27:00,307 INFO L81 ComplementDD]: Finished complementDD. Result has 49 states, 49 states have (on average 271.0) internal successors, (13279), 49 states have internal predecessors, (13279), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:27:00,308 INFO L175 Difference]: Start difference. First operand has 383 places, 1520 transitions, 30437 flow. Second operand 48 states and 5174 transitions. [2022-11-25 17:27:00,308 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 430 places, 2413 transitions, 50765 flow [2022-11-25 17:27:02,314 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 414 places, 2413 transitions, 48686 flow, removed 997 selfloop flow, removed 16 redundant places. [2022-11-25 17:27:02,360 INFO L231 Difference]: Finished difference. Result has 432 places, 2049 transitions, 44443 flow [2022-11-25 17:27:02,362 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=271, PETRI_DIFFERENCE_MINUEND_FLOW=28534, PETRI_DIFFERENCE_MINUEND_PLACES=367, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1489, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=786, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=596, PETRI_DIFFERENCE_SUBTRAHEND_STATES=48, PETRI_FLOW=44443, PETRI_PLACES=432, PETRI_TRANSITIONS=2049} [2022-11-25 17:27:02,362 INFO L288 CegarLoopForPetriNet]: 21 programPoint places, 411 predicate places. [2022-11-25 17:27:02,362 INFO L495 AbstractCegarLoop]: Abstraction has has 432 places, 2049 transitions, 44443 flow [2022-11-25 17:27:02,363 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 103.5) internal successors, (3933), 38 states have internal predecessors, (3933), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:27:02,363 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:27:02,363 INFO L209 CegarLoopForPetriNet]: trace histogram [4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:27:02,370 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff2a69db-f292-4098-8ca3-ff948148af61/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2022-11-25 17:27:02,569 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff2a69db-f292-4098-8ca3-ff948148af61/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2022-11-25 17:27:02,569 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-25 17:27:02,569 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:27:02,570 INFO L85 PathProgramCache]: Analyzing trace with hash -26139517, now seen corresponding path program 29 times [2022-11-25 17:27:02,570 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:27:02,570 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [957473140] [2022-11-25 17:27:02,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:27:02,570 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:27:02,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:27:03,279 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 3 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:27:03,279 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:27:03,279 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [957473140] [2022-11-25 17:27:03,279 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [957473140] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:27:03,279 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [685371680] [2022-11-25 17:27:03,280 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-25 17:27:03,280 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:27:03,280 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff2a69db-f292-4098-8ca3-ff948148af61/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:27:03,284 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff2a69db-f292-4098-8ca3-ff948148af61/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:27:03,307 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff2a69db-f292-4098-8ca3-ff948148af61/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2022-11-25 17:27:03,475 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-11-25 17:27:03,475 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 17:27:03,478 INFO L263 TraceCheckSpWp]: Trace formula consists of 267 conjuncts, 43 conjunts are in the unsatisfiable core [2022-11-25 17:27:03,479 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:27:03,929 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 1 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:27:03,929 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:27:04,029 INFO L321 Elim1Store]: treesize reduction 5, result has 64.3 percent of original size [2022-11-25 17:27:04,029 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 18 [2022-11-25 17:27:04,506 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 1 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:27:04,506 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [685371680] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:27:04,506 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 17:27:04,506 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 37 [2022-11-25 17:27:04,506 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1305540101] [2022-11-25 17:27:04,507 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 17:27:04,507 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-11-25 17:27:04,507 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:27:04,507 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-11-25 17:27:04,508 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=265, Invalid=1141, Unknown=0, NotChecked=0, Total=1406 [2022-11-25 17:27:05,312 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 102 out of 271 [2022-11-25 17:27:05,314 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 432 places, 2049 transitions, 44443 flow. Second operand has 38 states, 38 states have (on average 103.55263157894737) internal successors, (3935), 38 states have internal predecessors, (3935), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:27:05,314 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:27:05,314 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 102 of 271 [2022-11-25 17:27:05,314 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:27:17,723 INFO L130 PetriNetUnfolder]: 6539/11934 cut-off events. [2022-11-25 17:27:17,723 INFO L131 PetriNetUnfolder]: For 196454/196469 co-relation queries the response was YES. [2022-11-25 17:27:17,940 INFO L83 FinitePrefix]: Finished finitePrefix Result has 109859 conditions, 11934 events. 6539/11934 cut-off events. For 196454/196469 co-relation queries the response was YES. Maximal size of possible extension queue 635. Compared 93893 event pairs, 177 based on Foata normal form. 269/12199 useless extension candidates. Maximal degree in co-relation 109713. Up to 5233 conditions per place. [2022-11-25 17:27:17,990 INFO L137 encePairwiseOnDemand]: 263/271 looper letters, 754 selfloop transitions, 1910 changer transitions 22/2696 dead transitions. [2022-11-25 17:27:17,991 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 480 places, 2696 transitions, 60912 flow [2022-11-25 17:27:17,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-11-25 17:27:17,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2022-11-25 17:27:17,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 5288 transitions. [2022-11-25 17:27:18,001 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.3982227577377815 [2022-11-25 17:27:18,001 INFO L72 ComplementDD]: Start complementDD. Operand 49 states and 5288 transitions. [2022-11-25 17:27:18,001 INFO L73 IsDeterministic]: Start isDeterministic. Operand 49 states and 5288 transitions. [2022-11-25 17:27:18,002 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:27:18,003 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 49 states and 5288 transitions. [2022-11-25 17:27:18,006 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 50 states, 49 states have (on average 107.91836734693878) internal successors, (5288), 49 states have internal predecessors, (5288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:27:18,012 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 50 states, 50 states have (on average 271.0) internal successors, (13550), 50 states have internal predecessors, (13550), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:27:18,013 INFO L81 ComplementDD]: Finished complementDD. Result has 50 states, 50 states have (on average 271.0) internal successors, (13550), 50 states have internal predecessors, (13550), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:27:18,014 INFO L175 Difference]: Start difference. First operand has 432 places, 2049 transitions, 44443 flow. Second operand 49 states and 5288 transitions. [2022-11-25 17:27:18,014 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 480 places, 2696 transitions, 60912 flow [2022-11-25 17:27:21,987 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 464 places, 2696 transitions, 57149 flow, removed 1831 selfloop flow, removed 16 redundant places. [2022-11-25 17:27:22,035 INFO L231 Difference]: Finished difference. Result has 470 places, 2421 transitions, 54113 flow [2022-11-25 17:27:22,037 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=271, PETRI_DIFFERENCE_MINUEND_FLOW=40449, PETRI_DIFFERENCE_MINUEND_PLACES=416, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2000, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1481, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=454, PETRI_DIFFERENCE_SUBTRAHEND_STATES=49, PETRI_FLOW=54113, PETRI_PLACES=470, PETRI_TRANSITIONS=2421} [2022-11-25 17:27:22,037 INFO L288 CegarLoopForPetriNet]: 21 programPoint places, 449 predicate places. [2022-11-25 17:27:22,037 INFO L495 AbstractCegarLoop]: Abstraction has has 470 places, 2421 transitions, 54113 flow [2022-11-25 17:27:22,038 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 103.55263157894737) internal successors, (3935), 38 states have internal predecessors, (3935), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:27:22,038 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:27:22,038 INFO L209 CegarLoopForPetriNet]: trace histogram [4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:27:22,043 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff2a69db-f292-4098-8ca3-ff948148af61/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2022-11-25 17:27:22,238 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff2a69db-f292-4098-8ca3-ff948148af61/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2022-11-25 17:27:22,239 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-25 17:27:22,239 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:27:22,239 INFO L85 PathProgramCache]: Analyzing trace with hash 976388953, now seen corresponding path program 30 times [2022-11-25 17:27:22,239 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:27:22,239 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1633037260] [2022-11-25 17:27:22,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:27:22,239 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:27:22,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:27:22,998 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 3 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:27:22,998 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:27:22,998 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1633037260] [2022-11-25 17:27:22,998 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1633037260] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:27:22,999 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1248159185] [2022-11-25 17:27:22,999 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-25 17:27:22,999 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:27:22,999 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff2a69db-f292-4098-8ca3-ff948148af61/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:27:23,002 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff2a69db-f292-4098-8ca3-ff948148af61/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:27:23,007 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff2a69db-f292-4098-8ca3-ff948148af61/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2022-11-25 17:27:23,186 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-11-25 17:27:23,186 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 17:27:23,189 INFO L263 TraceCheckSpWp]: Trace formula consists of 267 conjuncts, 46 conjunts are in the unsatisfiable core [2022-11-25 17:27:23,190 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:27:23,673 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 17:27:23,674 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 21 [2022-11-25 17:27:23,886 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:27:23,887 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:27:24,273 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 17:27:24,273 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 44 [2022-11-25 17:27:24,278 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 18 [2022-11-25 17:27:25,055 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:27:25,055 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1248159185] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:27:25,055 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 17:27:25,055 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 40 [2022-11-25 17:27:25,055 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [790242043] [2022-11-25 17:27:25,055 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 17:27:25,056 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-11-25 17:27:25,056 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:27:25,056 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-11-25 17:27:25,057 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=227, Invalid=1413, Unknown=0, NotChecked=0, Total=1640 [2022-11-25 17:27:26,137 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 93 out of 271 [2022-11-25 17:27:26,139 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 470 places, 2421 transitions, 54113 flow. Second operand has 41 states, 41 states have (on average 94.4390243902439) internal successors, (3872), 41 states have internal predecessors, (3872), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:27:26,139 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:27:26,139 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 93 of 271 [2022-11-25 17:27:26,139 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:27:56,249 INFO L130 PetriNetUnfolder]: 14885/26330 cut-off events. [2022-11-25 17:27:56,249 INFO L131 PetriNetUnfolder]: For 374996/375011 co-relation queries the response was YES. [2022-11-25 17:27:56,846 INFO L83 FinitePrefix]: Finished finitePrefix Result has 232077 conditions, 26330 events. 14885/26330 cut-off events. For 374996/375011 co-relation queries the response was YES. Maximal size of possible extension queue 957. Compared 206564 event pairs, 442 based on Foata normal form. 381/26707 useless extension candidates. Maximal degree in co-relation 231924. Up to 8827 conditions per place. [2022-11-25 17:27:56,965 INFO L137 encePairwiseOnDemand]: 263/271 looper letters, 2325 selfloop transitions, 3751 changer transitions 1/6087 dead transitions. [2022-11-25 17:27:56,965 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 547 places, 6087 transitions, 132938 flow [2022-11-25 17:27:56,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2022-11-25 17:27:56,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2022-11-25 17:27:56,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 7706 transitions. [2022-11-25 17:27:56,972 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.3645567224903018 [2022-11-25 17:27:56,973 INFO L72 ComplementDD]: Start complementDD. Operand 78 states and 7706 transitions. [2022-11-25 17:27:56,973 INFO L73 IsDeterministic]: Start isDeterministic. Operand 78 states and 7706 transitions. [2022-11-25 17:27:56,975 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:27:56,975 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 78 states and 7706 transitions. [2022-11-25 17:27:56,983 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 79 states, 78 states have (on average 98.7948717948718) internal successors, (7706), 78 states have internal predecessors, (7706), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:27:56,998 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 79 states, 79 states have (on average 271.0) internal successors, (21409), 79 states have internal predecessors, (21409), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:27:57,002 INFO L81 ComplementDD]: Finished complementDD. Result has 79 states, 79 states have (on average 271.0) internal successors, (21409), 79 states have internal predecessors, (21409), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:27:57,002 INFO L175 Difference]: Start difference. First operand has 470 places, 2421 transitions, 54113 flow. Second operand 78 states and 7706 transitions. [2022-11-25 17:27:57,002 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 547 places, 6087 transitions, 132938 flow [2022-11-25 17:28:10,186 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 526 places, 6087 transitions, 126256 flow, removed 2725 selfloop flow, removed 21 redundant places. [2022-11-25 17:28:10,279 INFO L231 Difference]: Finished difference. Result has 564 places, 5332 transitions, 118782 flow [2022-11-25 17:28:10,281 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=271, PETRI_DIFFERENCE_MINUEND_FLOW=50037, PETRI_DIFFERENCE_MINUEND_PLACES=449, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2405, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1495, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=544, PETRI_DIFFERENCE_SUBTRAHEND_STATES=78, PETRI_FLOW=118782, PETRI_PLACES=564, PETRI_TRANSITIONS=5332} [2022-11-25 17:28:10,281 INFO L288 CegarLoopForPetriNet]: 21 programPoint places, 543 predicate places. [2022-11-25 17:28:10,281 INFO L495 AbstractCegarLoop]: Abstraction has has 564 places, 5332 transitions, 118782 flow [2022-11-25 17:28:10,282 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 94.4390243902439) internal successors, (3872), 41 states have internal predecessors, (3872), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:28:10,282 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:28:10,282 INFO L209 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:28:10,289 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff2a69db-f292-4098-8ca3-ff948148af61/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2022-11-25 17:28:10,488 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff2a69db-f292-4098-8ca3-ff948148af61/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2022-11-25 17:28:10,488 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-25 17:28:10,488 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:28:10,488 INFO L85 PathProgramCache]: Analyzing trace with hash -1228638936, now seen corresponding path program 31 times [2022-11-25 17:28:10,488 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:28:10,488 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1293427409] [2022-11-25 17:28:10,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:28:10,489 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:28:10,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:28:12,014 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:28:12,014 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:28:12,014 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1293427409] [2022-11-25 17:28:12,014 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1293427409] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:28:12,015 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1345049037] [2022-11-25 17:28:12,015 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-25 17:28:12,015 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:28:12,015 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff2a69db-f292-4098-8ca3-ff948148af61/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:28:12,016 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff2a69db-f292-4098-8ca3-ff948148af61/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:28:12,018 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff2a69db-f292-4098-8ca3-ff948148af61/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2022-11-25 17:28:12,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:28:12,184 INFO L263 TraceCheckSpWp]: Trace formula consists of 279 conjuncts, 75 conjunts are in the unsatisfiable core [2022-11-25 17:28:12,186 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:28:13,418 INFO L321 Elim1Store]: treesize reduction 86, result has 7.5 percent of original size [2022-11-25 17:28:13,419 INFO L350 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 67 treesize of output 22 [2022-11-25 17:28:13,486 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:28:13,486 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:28:14,292 INFO L321 Elim1Store]: treesize reduction 36, result has 77.1 percent of original size [2022-11-25 17:28:14,293 INFO L350 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 106 treesize of output 150 [2022-11-25 17:28:15,642 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:28:15,643 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1345049037] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:28:15,643 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 17:28:15,643 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14, 14] total 42 [2022-11-25 17:28:15,643 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [857087050] [2022-11-25 17:28:15,643 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 17:28:15,643 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2022-11-25 17:28:15,644 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:28:15,644 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2022-11-25 17:28:15,645 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=245, Invalid=1647, Unknown=0, NotChecked=0, Total=1892 [2022-11-25 17:28:19,334 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 94 out of 271 [2022-11-25 17:28:19,336 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 564 places, 5332 transitions, 118782 flow. Second operand has 44 states, 44 states have (on average 95.52272727272727) internal successors, (4203), 44 states have internal predecessors, (4203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:28:19,336 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:28:19,336 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 94 of 271 [2022-11-25 17:28:19,336 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand